Drop two PDFs
Keep both versions in view from the first click.
Private document review
See every PDF change.
Compare text and visual changes for free. Your files stay in this browser tab, so sensitive documents remain yours.
01 / Start here
Add two versions
No document history.
Source PDF
The earlier version
Modified PDF
The version to review
Browser-only Visual results first English OCR
Why ComparePDF
A calmer way to review documents.
No file uploads.
No cloud history or share links. The comparison lives only in your active tab.
Start with visual certainty.
Text changes and OCR arrive progressively without blocking the review.
02 / Workflow
Clarity in three moves.
Designed for contracts, reports, and any PDF where the smallest change matters.
Review the page
Use side-by-side, overlay, slider, or difference-map views.
Confirm text
Use selectable text or English OCR as a guide, then confirm against the rendered pages.
03 / Use cases
For the documents that deserve a second look.
Keep the context, remove the guesswork, and make the final human check faster.
01
Contracts
Spot changed clauses, dates, payment terms, and signatures before review.
02
Reports
See layout changes and new figures without sending a document to a server.
03
Scanned archives
Pair visual pages first, then use English OCR to find searchable text changes.
Questions, answered
A private tool should be easy to understand.
Do my PDFs leave the browser?
No. ComparePDF renders pages and extracts text in your browser tab. Clearing or leaving the page releases the comparison state.
Can I compare scanned PDFs?
Yes, for English scans. Visual comparison works for every rendered page; OCR runs on the first 20 pages and may need human verification.
What is the file size limit?
Each PDF can be up to 25 MB. Encrypted PDFs, handwriting, and semantic table comparison are not supported in the MVP.
Is this legal advice?
No. ComparePDF helps you review document changes, but results require human verification and are not legal advice.
