Documentation – Convert PDF documents using JavaScript

Javascript-Cpp: Convert PDF to Word documents in JavaScript

Fri, 04 Aug 2023 00:00:00 +0000

Converting operation depends on the number of pages in the document and can be very time-consuming. Therefore, we highly recommend using Web Workers.

This code demonstrates a way to offload resource-intensive PDF file converting tasks to a web worker to prevent blocking the main UI thread. It also offers a user-friendly way to download the converted file.

To edit the content of a PDF file in Microsoft Word or other word processors that support DOC and DOCX formats. PDF files are editable, but DOC and DOCX files are more flexible and customizable.

Try to convert PDF to DOC online

Aspose.PDF for JavaScript presents you online free application “PDF to DOC”, where you may try to investigate the functionality and quality it works.

Convert PDF to DOC


  /*Create Web Worker*/
  const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
  AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
  AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
    (evt.data == 'ready') ? 'loaded!' :
      (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/msword", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;

  /*Event handler*/
  const ffileToDoc = e => {
    const file_reader = new FileReader();
    file_reader.onload = event => {
      /*Convert a PDF-file to Doc and save the "ResultPDFtoDoc.doc" - Ask Web Worker*/
      AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfToDoc', "params": [event.target.result, e.target.files[0].name, "ResultPDFtoDoc.doc"] }, [event.target.result]);
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };

  /*Make a link to download the result file*/
  const DownloadFile = (filename, mime, content) => {
      mime = mime || "application/octet-stream";
      var link = document.createElement("a"); 
      link.href = URL.createObjectURL(new Blob([content], {type: mime}));
      link.download = filename;
      link.innerHTML = "Click here to download the file " + filename;
      document.body.appendChild(link); 
      document.body.appendChild(document.createElement("br"));
      return filename;
    }

The following JavaScript code snippet shows simple example of coverting PDF pages into DOC files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfToDoc function is executed.
The name of the resulting file is set, in this example “ResultPDFtoDoc.doc”.
Next, if the ‘json.errorCode’ is 0, then your result File is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


  var ffileToDoc = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      /*Convert a PDF-file to Doc and save the "ResultPDFtoDoc.doc"*/
      const json = AsposePdfToDoc(event.target.result, e.target.files[0].name, "ResultPDFtoDoc.doc");
      if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
      else document.getElementById('output').textContent = json.errorText;
      /*Make a link to download the result file*/
      DownloadFile(json.fileNameResult, "application/msword");
    }
    file_reader.readAsArrayBuffer(e.target.files[0]);
  }

Try to convert PDF to DOCX online

Aspose.PDF for JavaScript presents you online free application “PDF to Word”, where you may try to investigate the functionality and quality it works.

Convert PDF to DOCX

Aspose.PDF for JavaScript API lets you read and convert PDF documents to DOCX. DOCX is a well-known format for Microsoft Word documents whose structure was changed from plain binary to a combination of XML and binary files. Docx files can be opened with Word 2007 and lateral versions but not with the earlier versions of MS Word which support DOC file extensions.


  /*Create Web Worker*/
    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/vnd.openxmlformats-officedocument.wordprocessingml.document", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffileToDocX = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        /*convert a PDF-file to DocX and save the "ResultPDFtoDocX.docx" - Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfToDocX', "params": [event.target.result, e.target.files[0].name, "ResultPDFtoDocX.docx"] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };
  /// [Code snippet]

    /*make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF pages into DOCX files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfToDocX function is executed.
The name of the resulting file is set, in this example “ResultPDFtoDocX.docx”.
Next, if the ‘json.errorCode’ is 0, then your result File is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


  var ffileToDocX = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      /*convert a PDF-file to DocX and save the "ResultPDFtoDocX.docx"*/
      const json = AsposePdfToDocX(event.target.result, e.target.files[0].name, "ResultPDFtoDocX.docx");
      if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
      else document.getElementById('output').textContent = json.errorText;
      /*make a link to download the result file*/
      DownloadFile(json.fileNameResult, "application/vnd.openxmlformats-officedocument.wordprocessingml.document");
    }
    file_reader.readAsArrayBuffer(e.target.files[0]);
  }

Javascript-Cpp: Convert PDF to Excel in JavaScript

Wed, 01 Nov 2023 00:00:00 +0000

Creating spreadsheets from PDF using JavaScript

Aspose.PDF for JavaScript support the feature of converting PDF files to Excel, and CSV formats.

Try to convert PDF to Excel online

Aspose.PDF for JavaScript presents you online free application “PDF to XLSX”, where you may try to investigate the functionality and quality it works.

Converting operation depends on the number of pages in the document and can be very time-consuming. Therefore, we highly recommend using Web Workers.

Convert PDF to XLSX


  /*Create Web Worker*/
    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffileToXlsX = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        /*convert a PDF-file to XlsX and save the "ResultPDFtoXlsX.xlsx" - Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfToXlsX', "params": [event.target.result, e.target.files[0].name, "ResultPDFtoXlsX.xlsx"] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };
  /// [Code snippet]

    /*make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF pages into XlsX files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfToXlsX function is executed.
The name of the resulting file is set, in this example “ResultPDFtoXlsX.xlsx”.
Next, if the ‘json.errorCode’ is 0, then your result File is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


  var ffileToXlsX = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      /*convert a PDF-file to XlsX and save the "ResultPDFtoXlsX.xlsx"*/
      const json = AsposePdfToXlsX(event.target.result, e.target.files[0].name, "ResultPDFtoXlsX.xlsx");
      if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
      else document.getElementById('output').textContent = json.errorText;
      /*make a link to download the result file*/
      DownloadFile(json.fileNameResult, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
    }
    file_reader.readAsArrayBuffer(e.target.files[0]);
  }

Convert PDF to CSV


    /*Create Web Worker*/
    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? 
          `Files(tables) count: ${evt.data.json.filesCount.toString()}\n${evt.data.params.forEach(
            (element, index) => DownloadFile(evt.data.json.filesNameResult[index], "text/csv", element) ) ?? ""}` : 
          `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffileToCSV = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        /*Convert a PDF-file to CSV (extract tables) with template "ResultPdfTablesToCSV{0:D2}.csv" ({0}, {0:D2}, {0:D3}, ... format page number), TAB as delimiter and save - Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfTablesToCSV', "params": [event.target.result, e.target.files[0].name, "ResultPdfTablesToCSV{0:D2}.csv", "\t"] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };

    /*Make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF into CSV:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfTablesToCSV function is executed.
The name of the resulting file is set, in this example “ResultPdfTablesToCSV{0:D2}.csv”.
Next, if the ‘json.errorCode’ is 0, then your result File is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


  var ffileToCSV = function (e) {
      const file_reader = new FileReader();
      file_reader.onload = (event) => {
        /*Convert a PDF-file to CSV (extract tables) with template "ResultPdfTablesToCSV{0:D2}.csv" ({0}, {0:D2}, {0:D3}, ... format page number), TAB as delimiter*/
        const json = AsposePdfTablesToCSV(event.target.result, e.target.files[0].name, "ResultPdfTablesToCSV{0:D2}.csv", "\t");
        if (json.errorCode == 0) {
          document.getElementById('output').textContent = "Files(tables) count: " + json.filesCount.toString();
          /*Make links to result files*/
          for (let fileIndex = 0; fileIndex < json.filesCount; fileIndex++) DownloadFile(json.filesNameResult[fileIndex], "text/csv");
        }
        else document.getElementById('output').textContent = json.errorText;
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };

Javascript-Cpp: Convert PDF to PPTX in JavaScript

Wed, 01 Nov 2023 00:00:00 +0000

Converting operation depends on the number of pages in the document and can be very time-consuming. Therefore, we highly recommend using Web Workers.

Try to convert PDF to PowerPoint online

Aspose.PDF for JavaScript presents you online free application “PDF to PPTX”, where you may try to investigate the functionality and quality it works.

Convert PDF to PPTX


  /*Create Web Worker*/
  const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
  AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
  AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
    (evt.data == 'ready') ? 'loaded!' :
      (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/vnd.openxmlformats-officedocument.presentationml.presentation", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;

  /*Event handler*/
  const ffileToPptX = e => {
    const file_reader = new FileReader();
    file_reader.onload = event => {
      /*Convert a PDF-file to PptX and save the "ResultPDFtoPptX.pptx" - Ask Web Worker*/
      AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfToPptX', "params": [event.target.result, e.target.files[0].name, "ResultPDFtoPptX.pptx"] }, [event.target.result]);
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };

  /*Make a link to download the result file*/
  const DownloadFile = (filename, mime, content) => {
      mime = mime || "application/octet-stream";
      var link = document.createElement("a"); 
      link.href = URL.createObjectURL(new Blob([content], {type: mime}));
      link.download = filename;
      link.innerHTML = "Click here to download the file " + filename;
      document.body.appendChild(link); 
      document.body.appendChild(document.createElement("br"));
      return filename;
    }

The following JavaScript code snippet shows simple example of coverting PDF to PPTX files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfToPptX function is executed.
The name of the resulting file is set, in this example “ResultPDFtoPptX.pptx”.
Next, if the ‘json.errorCode’ is 0, then your result File is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


  var ffileToPptX = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      /*Convert a PDF-file to PptX and save the "ResultPDFtoPptX.pptx"*/
      const json = AsposePdfToPptX(event.target.result, e.target.files[0].name, "ResultPDFtoPptX.pptx");
      if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
      else document.getElementById('output').textContent = json.errorText;
      /*Make a link to download the result file*/
      DownloadFile(json.fileNameResult, "application/vnd.openxmlformats-officedocument.presentationml.presentation");
    }
    file_reader.readAsArrayBuffer(e.target.files[0]);
  }

Javascript-Cpp: Convert PDF to Image Formats in JavaScript

Wed, 01 Nov 2023 00:00:00 +0000

JavaScript Convert PDF to Image

In this article, we will show you the options for converting PDF to image formats.

Previously scanned documents are often saved in the PDF file format. However, do you need to edit it in a graphic editor or send it further in image format? We have a universal tool for you to convert PDF to images using The most common task is when you need to save an entire PDF document or some specific pages of a document as a set of images. Aspose for JavaScript via C++ allows you to convert PDF to JPG and PNG formats to simplify the steps required to get your images from a specific PDF file.

Aspose.PDF for JavaScript via C++ supports various PDF to image formats conversion. Please checks the section Aspose.PDF Supported File Formats.

Converting operation depends on the number of pages in the document and can be very time-consuming. Therefore, we highly recommend using Web Workers.

Try to convert PDF to JPEG online

Aspose.PDF for JavaScript presents you online free application “PDF to JPEG”, where you may try to investigate the functionality and quality it works.

Convert PDF to JPEG


  /*Create Web Worker*/
    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? 
          `Files(pages) count: ${evt.data.json.filesCount.toString()}\n${evt.data.params.forEach(
            (element, index) => DownloadFile(evt.data.json.filesNameResult[index], "image/jpeg", element) ) ?? ""}` : 
          `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffileToJpg = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        const password = 'owner';
        /*convert a PDF file to jpg-files with template "ResultPdfToJpg{0:D2}.jpg" ({0}, {0:D2}, {0:D3}, ... format page number), resolution 150 DPI and save - Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfPagesToJpg', "params": [event.target.result, e.target.files[0].name, "ResultPdfToJpg{0:D2}.jpg", 150] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };
  /// [Code snippet]

    /*make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF pages into Jpeg files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfPagesToJpg function is executed.
The name of the resulting file is set, in this example “ResultPdfToJpg{0:D2}.jpg”.
Next, if the ‘json.errorCode’ is 0, then your result File is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


  var ffileToJpg = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      /*convert a PDF file to jpg-files with template "ResultPdfToJpg{0:D2}.jpg" ({0}, {0:D2}, {0:D3}, ... format page number), resolution 150 DPI and save*/
      const json = AsposePdfPagesToJpg(event.target.result, e.target.files[0].name, "ResultPdfToJpg{0:D2}.jpg", 150);
      if (json.errorCode == 0) {
        document.getElementById('output').textContent = "Files(pages) count: " + json.filesCount.toString();
        /*make links to result files*/
        for (let fileIndex = 0; fileIndex < json.filesCount; fileIndex++) DownloadFile(json.filesNameResult[fileIndex], "image/jpeg");
      }
      else document.getElementById('output').textContent = json.errorText;
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };

Try to convert PDF to TIFF online

Aspose.PDF for JavaScript presents you online free application “PDF to TIFF”, where you may try to investigate the functionality and quality it works.

Convert PDF to TIFF


  /*Create Web Worker*/
    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? 
          `Files(pages) count: ${evt.data.json.filesCount.toString()}\n${evt.data.params.forEach(
            (element, index) => DownloadFile(evt.data.json.filesNameResult[index], "image/tiff", element) ) ?? ""}` : 
          `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffileToTiff = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        /*Convert a PDF-file to TIFF with template "ResultPdfToTiff{0:D2}.tiff" ({0}, {0:D2}, {0:D3}, ... format page number), resolution 150 DPI and save - Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfPagesToTiff', "params": [event.target.result, e.target.files[0].name, "ResultPdfToTiff{0:D2}.tiff", 150] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };

    /*Make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF pages into Tiff files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfPagesToTiff function is executed.
The name of the resulting file is set, in this example “ResultPdfToTiff{0:D2}.tiff”.
Next, if the ‘json.errorCode’ is 0, then your DownloadFile is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


    var ffileToTiff = function (e) {
      const file_reader = new FileReader();
      file_reader.onload = (event) => {
        /*Convert a PDF-file to TIFF with template "ResultPdfToTiff{0:D2}.tiff" ({0}, {0:D2}, {0:D3}, ... format page number), resolution 150 DPI and save*/
        const json = AsposePdfPagesToTiff(event.target.result, e.target.files[0].name, "ResultPdfToTiff{0:D2}.tiff", 150);
        if (json.errorCode == 0) {
          document.getElementById('output').textContent = "Files(pages) count: " + json.filesCount.toString();
          /*Make links to result files*/
          for (let fileIndex = 0; fileIndex < json.filesCount; fileIndex++) DownloadFile(json.filesNameResult[fileIndex], "image/tiff");
        }
        else document.getElementById('output').textContent = json.errorText;
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };

Try to convert PDF to PNG online

As an example of how our free applications work please check the next feature.

Aspose.PDF for JavaScript presents you online free application “PDF to PNG”, where you may try to investigate the functionality and quality it works.

Convert PDF to PNG


  /*Create Web Worker*/
    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? 
          `Files(pages) count: ${evt.data.json.filesCount.toString()}\n${evt.data.params.forEach(
            (element, index) => DownloadFile(evt.data.json.filesNameResult[index], "image/png", element) ) ?? ""}` : 
          `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffileToPng = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        const password = 'owner';
        /*convert a PDF file to png-files with template "ResultPdfToPng{0:D2}.png" ({0}, {0:D2}, {0:D3}, ... format page number), resolution 150 DPI and save - Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfPagesToPng', "params": [event.target.result, e.target.files[0].name, "ResultPdfToPng{0:D2}.png", 150] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };
  /// [Code snippet]

    /*make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF pages into PNG files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfPagesToPng function is executed.
The name of the resulting file is set, in this example “ResultPdfToPng{0:D2}.png”.
Next, if the ‘json.errorCode’ is 0, then your DownloadFile is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


  var ffileToPng = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      /*convert a PDF file to png-files with template "ResultPdfToPng{0:D2}.png" ({0}, {0:D2}, {0:D3}, ... format page number), resolution 150 DPI and save*/
      const json = AsposePdfPagesToPng(event.target.result, e.target.files[0].name, "ResultPdfToPng{0:D2}.png", 150);
      if (json.errorCode == 0) {
        document.getElementById('output').textContent = "Files(pages) count: " + json.filesCount.toString();
        /*make links to result files*/
        for (let fileIndex = 0; fileIndex < json.filesCount; fileIndex++) DownloadFile(json.filesNameResult[fileIndex], "image/png");
      }
      else document.getElementById('output').textContent = json.errorText;
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };

Try to convert PDF to SVG online

Aspose.PDF for JavaScript presents you online free application “PDF to SVG”, where you may try to investigate the functionality and quality it works.

Scalable Vector Graphics (SVG) is a family of specifications of an XML-based file format for two-dimensional vector graphics, both static and dynamic (interactive or animated). The SVG specification is an open standard that has been under development by the World Wide Web Consortium (W3C) since 1999.

Convert PDF to SVG


  /*Create Web Worker*/
    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? 
          `Files(pages) count: ${evt.data.json.filesCount.toString()}\n${evt.data.params.forEach(
            (element, index) => DownloadFile(evt.data.json.filesNameResult[index], "image/svg", element) ) ?? ""}` : 
          `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffileToSvg = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        /*Convert a PDF-file to SVG - Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfPagesToSvg', "params": [event.target.result, e.target.files[0].name, "ResultPdfToSvg.svg"] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };

    /*Make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF pages into SVG files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfPagesToSvg function is executed.
The name of the resulting file is set, in this example “ResultPdfToSvg.svg”.
Next, if the ‘json.errorCode’ is 0, then your DownloadFile is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


    var ffileToSvg = function (e) {
      const file_reader = new FileReader();
      file_reader.onload = (event) => {
        /*Convert a PDF-file to SVG*/
        const json = AsposePdfPagesToSvg(event.target.result, e.target.files[0].name, "ResultPdfToSvg.svg");
        if (json.errorCode == 0) {
          document.getElementById('output').textContent = "Files(pages) count: " + json.filesCount.toString();
          /*Make links to result files*/
          for (let fileIndex = 0; fileIndex < json.filesCount; fileIndex++) DownloadFile(json.filesNameResult[fileIndex], "image/svg");
        }
        else document.getElementById('output').textContent = json.errorText;
      }
      file_reader.readAsArrayBuffer(e.target.files[0]);
    }

Convert PDF to zipped SVG


  /*Create Web Worker*/
    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/zip", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffileToSvgZip = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        /*Convert a PDF-file to SVG(zip) and save the "ResultPdfToSvgZip.zip" - Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfPagesToSvgZip', "params": [event.target.result, e.target.files[0].name, "ResultPdfToSvgZip.zip"] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };

    /*Make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF pages into SVG(zip) files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfPagesToSvgZip function is executed.
The name of the resulting file is set, in this example “ResultPdfToSvgZip.zip”.
Next, if the ‘json.errorCode’ is 0, then your DownloadFile is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


    var ffileToSvgZip = function (e) {
      const file_reader = new FileReader();
      file_reader.onload = (event) => {
        /*Convert a PDF-file to SVG(zip) and save the "ResultPdfToSvgZip.zip"*/
        const json = AsposePdfPagesToSvgZip(event.target.result, e.target.files[0].name, "ResultPdfToSvgZip.zip");
        if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
        else document.getElementById('output').textContent = json.errorText;
        /*Make a link to download the result file*/
        DownloadFile(json.fileNameResult, "application/zip");
      }
      file_reader.readAsArrayBuffer(e.target.files[0]);
    }

Convert PDF to DICOM


  /*Create Web Worker*/
  const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
  AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
  AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
    (evt.data == 'ready') ? 'loaded!' :
      (evt.data.json.errorCode == 0) ?
        `Files(pages) count: ${evt.data.json.filesCount.toString()}\n${evt.data.params.forEach(
          (element, index) => DownloadFile(evt.data.json.filesNameResult[index], "application/dicom", element) ) ?? ""}` :
        `Error: ${evt.data.json.errorText}`;

  /*Event handler*/
  const ffileToDICOM = e => {
    const file_reader = new FileReader();
    file_reader.onload = event => {
      /*Convert a PDF-file to DICOM with template "ResultPdfToDICOM{0:D2}.dcm" ({0}, {0:D2}, {0:D3}, ... format page number), resolution 150 DPI and save - Ask Web Worker*/
      AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfPagesToDICOM', "params": [event.target.result, e.target.files[0].name, "ResultPdfToDICOM{0:D2}.dcm", 150] }, [event.target.result]);
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };

  /*Make a link to download the result file*/
  const DownloadFile = (filename, mime, content) => {
      mime = mime || "application/octet-stream";
      var link = document.createElement("a"); 
      link.href = URL.createObjectURL(new Blob([content], {type: mime}));
      link.download = filename;
      link.innerHTML = "Click here to download the file " + filename;
      document.body.appendChild(link); 
      document.body.appendChild(document.createElement("br"));
      return filename;
    }

The following JavaScript code snippet shows simple example of coverting PDF pages into DICOM files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfPagesToDICOM function is executed.
The name of the resulting file is set, in this example “ResultPdfToDICOM{0:D2}.dcm”.
Next, if the ‘json.errorCode’ is 0, then your result File is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


  var ffileToDICOM = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      /*Convert a PDF-file to DICOM with template "ResultPdfToDICOM{0:D2}.dcm" ({0}, {0:D2}, {0:D3}, ... format page number), resolution 150 DPI and save*/
      const json = AsposePdfPagesToDICOM(event.target.result, e.target.files[0].name, "ResultPdfToDICOM{0:D2}.dcm", 150);
      if (json.errorCode == 0) {
        document.getElementById('output').textContent = "Files(pages) count: " + json.filesCount.toString();
        /*Make links to result files*/
        for (let fileIndex = 0; fileIndex < json.filesCount; fileIndex++) DownloadFile(json.filesNameResult[fileIndex], "application/dicom");
      }
      else document.getElementById('output').textContent = json.errorText;
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };

Convert PDF to BMP


    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? 
          `Files(pages) count: ${evt.data.json.filesCount.toString()}\n${evt.data.params.forEach(
            (element, index) => DownloadFile(evt.data.json.filesNameResult[index], "image/bmp", element) ) ?? ""}` : 
          `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffileToBmp = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        /*Convert a PDF-file to BMP with template "ResultPdfToBmp{0:D2}.bmp" ({0}, {0:D2}, {0:D3}, ... format page number), resolution 150 DPI and save - Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfPagesToBmp', "params": [event.target.result, e.target.files[0].name, "ResultPdfToBmp{0:D2}.bmp", 150] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };

    /*Make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF pages into BMP files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfPagesToBmp function is executed.
The name of the resulting file is set, in this example “ResultPdfToBmp{0:D2}.bmp”.
Next, if the ‘json.errorCode’ is 0, then your DownloadFile is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


    var ffileToBmp = function (e) {
      const file_reader = new FileReader();
      file_reader.onload = (event) => {
        /*Convert a PDF-file to BMP with template "ResultPdfToBmp{0:D2}.bmp" ({0}, {0:D2}, {0:D3}, ... format page number), resolution 150 DPI and save*/
        const json = AsposePdfPagesToBmp(event.target.result, e.target.files[0].name, "ResultPdfToBmp{0:D2}.bmp", 150);
        if (json.errorCode == 0) {
          document.getElementById('output').textContent = "Files(pages) count: " + json.filesCount.toString();
          /*Make links to result files*/
          for (let fileIndex = 0; fileIndex < json.filesCount; fileIndex++) DownloadFile(json.filesNameResult[fileIndex], "image/bmp");
        }
        else document.getElementById('output').textContent = json.errorText;
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };

Javascript-Cpp: Convert PDF to EPUB, TeX, Text, XPS in JavaScript

Wed, 01 Nov 2023 00:00:00 +0000

Converting operation depends on the number of pages in the document and can be very time-consuming. Therefore, we highly recommend using Web Workers.

Try to convert PDF to EPUB online

Aspose.PDF for JavaScript presents you online free application “PDF to EPUB”, where you may try to investigate the functionality and quality it works.

Convert PDF to EPUB

EPUB is a free and open e-book standard from the International Digital Publishing Forum (IDPF). Files have the extension .epub. EPUB is designed for reflowable content, meaning that an EPUB reader can optimize text for a particular display device. EPUB also supports fixed-layout content. The format is intended as a single format that publishers and conversion houses can use in-house, as well as for distribution and sale. It supersedes the Open eBook standard.


    /*Create Web Worker*/
    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/epub+zip", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffileToEPUB = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        /*Convert a PDF-file to ePub and save the "ResultPDFtoEPUB.epub" - Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfToEPUB', "params": [event.target.result, e.target.files[0].name, "ResultPDFtoEPUB.epub"] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };

    /*Make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF pages into EPUB files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfToEPUB function is executed.
The name of the resulting file is set, in this example “ResultPDFtoEPUB.epub”.
Next, if the ‘json.errorCode’ is 0, then your result File is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


    var ffileToEPUB = function (e) {
      const file_reader = new FileReader();
      file_reader.onload = (event) => {
        /*Convert a PDF-file to EPUB and save the "ResultPDFtoEPUB.epub"*/
        const json = AsposePdfToEPUB(event.target.result, e.target.files[0].name, "ResultPDFtoEPUB.epub");
        if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
        else document.getElementById('output').textContent = json.errorText;
        /*Make a link to download the result file*/
        DownloadFile(json.fileNameResult, "application/epub+zip");
      }
      file_reader.readAsArrayBuffer(e.target.files[0]);
    }

Try to convert PDF to LaTeX/TeX online

Aspose.PDF for JavaScript presents you online free application “PDF to LaTeX”, where you may try to investigate the functionality and quality it works.

Convert PDF to TeX

Aspose.PDF for JavaScript support converting PDF to TeX. The LaTeX file format is a text file format with the special markup and used in TeX-based document preparation system for high-quality typesetting.


  /*Create Web Worker*/
    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/x-tex", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffileToTeX = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        /*Convert a PDF-file to TeX and save the "ResultPDFtoTeX.tex" - Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfToTeX', "params": [event.target.result, e.target.files[0].name, "ResultPDFtoTeX.tex"] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };

    /*Make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF pages into TEX files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfToTeX function is executed.
The name of the resulting file is set, in this example “ResultPDFtoTeX.tex”.
Next, if the ‘json.errorCode’ is 0, then your result File is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


    var ffileToTeX = function (e) {
      const file_reader = new FileReader();
      file_reader.onload = (event) => {
        /*Convert a PDF-file to TeX and save the "ResultPDFtoTeX.tex"*/
        const json = AsposePdfToTeX(event.target.result, e.target.files[0].name, "ResultPDFtoTeX.tex");
        if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
        else document.getElementById('output').textContent = json.errorText;
        /*Make a link to download the result file*/
        DownloadFile(json.fileNameResult, "application/x-tex");
      }
      file_reader.readAsArrayBuffer(e.target.files[0]);
    }

Try to convert Convert PDF to Text online

Aspose.PDF for JavaScript presents you online free application “PDF to Text”, where you may try to investigate the functionality and quality it works.

Convert PDF to TXT


    /*Create Web Worker*/
    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "text/plain", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffileToTxt = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        /*Convert a PDF-file to Txt and save the "ResultPDFtoTxt.txt" - Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfToTxt', "params": [event.target.result, e.target.files[0].name, "ResultPDFtoTxt.txt"] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };

    /*Make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF pages into TXT files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfToTxt function is executed.
The name of the resulting file is set, in this example “ResultPDFtoTxt.txt”.
Next, if the ‘json.errorCode’ is 0, then your result File is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


    var ffileToTxt = function (e) {
      const file_reader = new FileReader();
      file_reader.onload = (event) => {
        /*Convert a PDF-file to Txt and save the "ResultPDFtoTxt.txt"*/
        const json = AsposePdfToTxt(event.target.result, e.target.files[0].name, "ResultPDFtoTxt.txt");
        if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
        else document.getElementById('output').textContent = json.errorText;
        /*Make a link to download the result file*/
        DownloadFile(json.fileNameResult, "text/plain");
      }
      file_reader.readAsArrayBuffer(e.target.files[0]);
    }

Try to convert PDF to XPS online

Aspose.PDF for JavaScript presents you online free application “PDF to XPS”, where you may try to investigate the functionality and quality it works.

Convert PDF to XPS

The XPS file type is primarily associated with the XML Paper Specification by Microsoft Corporation. The XML Paper Specification (XPS), formerly codenamed Metro and subsuming the Next Generation Print Path (NGPP) marketing concept, is Microsoft’s initiative to integrate document creation and viewing into the Windows operating system.

Aspose.PDF for JavaScript gives a possibility to convert PDF files to XPS format. Let try to use the presented code snippet for converting PDF files to XPS format with JavaScript.


    /*Create Web Worker*/
    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/vnd.ms-xpsdocument", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffileToXps = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        /*Convert a PDF-file to Xps and save the "ResultPDFtoXps.xps" - Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfToXps', "params": [event.target.result, e.target.files[0].name, "ResultPDFtoXps.xps"] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };

    /*Make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF pages into XPS files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfToXps function is executed.
The name of the resulting file is set, in this example “ResultPDFtoXps.xps”.
Next, if the ‘json.errorCode’ is 0, then your result File is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


    var ffileToXps = function (e) {
      const file_reader = new FileReader();
      file_reader.onload = (event) => {
        /*Convert a PDF-file to Xps and save the "ResultPDFtoXps.xps"*/
        const json = AsposePdfToXps(event.target.result, e.target.files[0].name, "ResultPDFtoXps.xps");
        if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
        else document.getElementById('output').textContent = json.errorText;
        /*Make a link to download the result file*/
        DownloadFile(json.fileNameResult, "application/vnd.ms-xpsdocument");
      }
      file_reader.readAsArrayBuffer(e.target.files[0]);
    }

Convert PDF to Grayscale PDF

Convert PDF to black and white with Aspose.PDF for JavaScript via C++ Web toolkit. Why should I convert PDF to Grayscale? If the PDF file contains many color images and the file size is important instead of color, the conversion saves space. If you print a PDF file in black and white, converting it will allow you to visually check what the end result looks like.


  /*Create Web Worker*/
    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/pdf", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffileConvertToGrayscale = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        /*convert a PDF-file to grayscale and save the "ResultConvertToGrayscale.pdf" - Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfConvertToGrayscale', "params": [event.target.result, e.target.files[0].name, "ResultConvertToGrayscale.pdf"] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };
  /// [Code snippet]

    /*make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF pages into Grayscale PDF:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfConvertToGrayscale function is executed.
The name of the resulting file is set, in this example “ResultConvertToGrayscale.pdf”.
Next, if the ‘json.errorCode’ is 0, then your DownloadFile is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


  var ffileConvertToGrayscale = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      /*convert a PDF-file to grayscale and save the "ResultConvertToGrayscale.pdf"*/
      const json = AsposePdfConvertToGrayscale(event.target.result, e.target.files[0].name, "ResultConvertToGrayscale.pdf");
      if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
      else document.getElementById('output').textContent = json.errorText;
      /*make a link to download the result file*/
      DownloadFile(json.fileNameResult, "application/pdf");
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };

Javascript-Cpp: Convert PDF to PDF/A formats

Wed, 01 Nov 2023 00:00:00 +0000

Aspose.PDF for JavaScript allows you to convert a PDF file to a PDF/A compliant PDF file.

Converting operation depends on the number of pages in the document and can be very time-consuming. Therefore, we highly recommend using Web Workers.

Try to convert PDF to PDF/A online

Aspose.PDF for JavaScript presents you online free application “PDF to PDF/A-1A”, where you may try to investigate the functionality and quality it works.

Convert PDF to PDF/A format


  /*Create Web Worker*/
    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/pdf", evt.data.params[0])}\n${DownloadFile(evt.data.json.fileNameLogResult, "application/xml", evt.data.params[1])}` : `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffilePdfConvertToPDFA = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        const pdfFormat = 'Module.PdfFormat.PDF_A_1A';
        /*convert a PDF-file to PDF/A(1A) and save the "ResultConvertToPDFA.pdf"*/
        /*during conversion process, the validation is also performed, "ResultConvertToPDFA.xml"- Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfConvertToPDFA', "params": [event.target.result, e.target.files[0].name, pdfFormat, "ResultConvertToPDFA.pdf", "ResultConvertToPDFA.xml"] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };
  /// [Code snippet]

    /*make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF to PDF/A files:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfConvertToPDFA function is executed.
The name of the resulting file is set, in this example “ResultConvertToPDFA.pdf”. During conversion process, the validation is also performed, “ResultConvertToPDFA.xml”.
Next, if the ‘json.errorCode’ is 0, then your DownloadFile is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file, and link to download the Log (xml) file to the user’s operating system.


  var ffilePdfConvertToPDFA = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      /*convert a PDF-file to PDF/A(1A) and save the "ResultConvertToPDFA.pdf"*/
      /*during conversion process, the validation is also performed, "ResultConvertToPDFA.xml"*/
      const json = AsposePdfConvertToPDFA(event.target.result, e.target.files[0].name, Module.PdfFormat.PDF_A_1A, "ResultConvertToPDFA.pdf", "ResultConvertToPDFA.xml");
      if (json.errorCode == 0)
      {
        document.getElementById('output').textContent = json.fileNameResult + "\nLog file (xml format): " + json.fileNameLogResult;
        /*make a link to download the result file*/
        DownloadFile(json.fileNameResult, "application/pdf");
      }
      else document.getElementById('output').textContent = json.errorText + "\nLog file (xml format): " + json.fileNameLogResult;
      /*make a link to download the Log (xml)*/
      DownloadFile(json.fileNameLogResult, "application/xml");
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };

Javascript-Cpp: Convert PDF/A to PDF format

Wed, 01 Nov 2023 00:00:00 +0000

Convert PDF/A to PDF format


  /*Create Web Worker*/
    const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
    AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
    AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
      (evt.data == 'ready') ? 'loaded!' :
        (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/pdf", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;

    /*Event handler*/
    const ffilePdfAConvertToPDF = e => {
      const file_reader = new FileReader();
      file_reader.onload = event => {
        /*convert a PDF/A-file to PDF and save the "ResultConvertToPDF.pdf" - Ask Web Worker*/
        AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfAConvertToPDF', "params": [event.target.result, e.target.files[0].name, "ResultConvertToPDF.pdf"] }, [event.target.result]);
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };
  /// [Code snippet]

    /*make a link to download the result file*/
    const DownloadFile = (filename, mime, content) => {
        mime = mime || "application/octet-stream";
        var link = document.createElement("a"); 
        link.href = URL.createObjectURL(new Blob([content], {type: mime}));
        link.download = filename;
        link.innerHTML = "Click here to download the file " + filename;
        document.body.appendChild(link); 
        document.body.appendChild(document.createElement("br"));
        return filename;
      }

The following JavaScript code snippet shows simple example of coverting PDF/A to PDF:

Select a PDF file for converting.
Create a ‘FileReader’.
The AsposePdfAConvertToPDF function is executed.
The name of the resulting file is set, in this example “ResultConvertToPDFA.pdf”.
Next, if the ‘json.errorCode’ is 0, then your DownloadFile is given the name you specified earlier. If the ‘json.errorCode’ parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the ‘json.errorText’ file.
As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.


    var ffilePdfAConvertToPDF = function (e) {
      const file_reader = new FileReader();
      file_reader.onload = (event) => {
        /*convert a PDF/A-file to PDF and save the "ResultConvertToPDF.pdf"*/
        const json = AsposePdfAConvertToPDF(event.target.result, e.target.files[0].name, "ResultConvertToPDF.pdf");
        if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
        else document.getElementById('output').textContent = json.errorText;
        /*make a link to download the result file*/
        DownloadFile(json.fileNameResult, "application/pdf");
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };