Private spreadsheet comparison

Compare Excel Files Online with WorkbookDiff

Compare Excel files online for value, stored-formula and hidden-content changes in aligned XLSX versions. Export a free CSV. Your files stay in your browser.

Pricing: free tools and proposed plans. Subscription plans are demo only.

Free comparison
No signup
Files stay local
XLSX up to 20 MB

Start a comparison

Choose two Excel files

XLSX only / 20 MB per file

Best fit: two versions of the same workbook with stable row and column positions. Rows moved? Reconcile rows by ID locally (XLSX or CSV beta).

Repeat this workflow? Explore monthly workflow plans. No live subscription billing yet / demo intent only. Free compare and CSV remain unlimited.

Original Excel file

Select the earlier version

Select original XLSX

No file selected

Updated Excel file

Select the version you want to check

Select updated XLSX

No file selected

Select two XLSX files to compare.

Choose the right comparison job

What do you need to compare?

Choosing a task helps us improve the right workflow. No workbook data is collected.

Available nowSame-layout workbook versions

Compare values, stored formulas, sheets, visibility, hidden rows and columns.

Use version compare Available nowFormula changes

Focus on changed formula expressions between two aligned XLSX versions.

Review formula mode Local betaMatch rows by ID or key

For reordered rows, missing records, invoices, SKUs, orders, or migration checks.

Reconcile XLSX or CSV

Your comparison result

0 detected changes

Change	Worksheet	Location	Before	After

Filter by worksheet, formula transitions or search text to focus your review. Filters change the table view only: CSV and the full handoff report still include all supported changes. This comparison is not a forensic or compliance audit.

Optional handoff report · preview

Turn differences into a review handoff

Reviewing files every month? Explore subscription plans. No live subscription billing yet / demo intent only. The one-time report purchase below is unchanged.

Comparison, filters and CSV remain free. Add your review notes and preview the report locally. The optional paid private audit handoff report covers one workbook pair, with repeat exports of the same report. No subscription.

This starts a private draft download before opening checkout in a new tab. Keep the draft and both XLSX files. Already paid? Use your purchase code below instead.

Report title Prepared by (optional)

Handoff note

Review individual changes

Restore a saved draft for these same files

Checkout is shown only when the payment service is available. Save your private draft first.

Before purchasing: Terms · Privacy · Refunds & Support · Contact. Payments are processed by Creem as merchant of record.

Drafts contain comparison content and notes. Save your draft and keep both original XLSX files before leaving; we cannot recover them for you. Review marks are your own assessment, not an independent audit or signature. Maximum 10,000 changes and an 8 MB draft; no silent truncation.

Example comparison result

See exactly what changed

Each difference includes its worksheet, cell or range, change type, previous content, and current content.

Example

ChangeLocationBeforeAfter

Value changedBudget / B12$24,000$26,500

Formula changedForecast / F8=SUM(F2:F7)=SUM(F2:F7)*1.05

Row visibilityInputs / Row 14VisibleHidden

Why WorkbookDiff

Review two aligned XLSX versions locally, separate stored formula edits from value changes, and export a free CSV. For reordered records, use the separate reconcile-by-ID beta; version comparison does not align rows.

Optional private audit handoff reports add your review notes and a paid HTML / print export, not an independent audit. See the one-time report option.

Workflow comparison. “Varies” means capabilities depend on the tool or edition; no universal claims about other tools.
Feature	WorkbookDiff	Typical free online diff	Microsoft Spreadsheet Compare
Two aligned XLSX versions for audit review	Yes; compares the same cell addresses	Varies	Varies by workflow
Stored formula changes separated from value changes	Yes; stored expressions, not recalculation	Varies	Varies by workflow
Hidden rows/columns, sheet visibility and used-range structural signals	Yes; structural signals, not row alignment	Varies	Varies by workflow
Filterable change list and free CSV export	Yes; CSV includes all supported changes	Varies	Varies
Local reconcile-by-ID beta for reordered rows	Separate beta; matches records by chosen ID/key	Varies	Varies
Files stay in the browser	Yes; workbook content is processed locally	Varies	Desktop application; not browser-based
Works on Mac / without Inquire	Yes; modern browser, no Inquire required	Varies	Windows only; requires an eligible Office Professional Plus or Microsoft 365 enterprise edition
Optional paid private audit handoff report	One-time HTML / print export with your review notes	Varies	Varies

Version comparison requires aligned layouts. It does not compare formatting or VBA.

Workbook-level comparison

Find more than changed cell values

Compare Excel sheets inside two workbook versions and review each supported difference by type and location.

Cell values

See added, removed, and edited cell content by worksheet and address.

Formula expressions

Review formula-expression changes separately from ordinary values.

Workbook structure

Detect added or removed sheets, visibility changes, and used-range changes.

Hidden rows and columns

Surface hidden row and column changes as dedicated comparison entries.

Three local steps

How to compare two Excel files

Choose the original XLSX file

Select the earlier workbook version from your device.

Choose the updated XLSX file

Select the workbook version you want to check.

Compare, filter, and export the differences

Review supported changes and download the result as CSV.

Common workbook checks

Check workbook versions before they cause mistakes

Review a revised budget before approval.
Verify changes in a recurring report.
Check a client or vendor workbook update.
Create a CSV record of detected differences.

Excel comparison guides

Choose the comparison task that matches your workbook

Open the guide for the result you need: a full workbook comparison, formula review, browser-local workflow, or CSV difference report.

Compare two Excel files online Main comparison page

Use this for the broad task of checking two workbook versions side by side.

Detect formula replaced by value Expression diff page

Use this when the real question is what changed in formulas, not just values.

Compare Excel files without uploading No upload workflow

Use this for privacy-led searches that want browser-local processing.

Excel difference report CSV Difference report page

Use this when the user needs a reviewable CSV trail of workbook changes.

Clear product boundary

Supported comparison and current limits

WorkbookDiff currently supports `.xlsx` files up to 20 MB each. It does not support `.xls`, `.xlsm`, `.xlsb`, CSV, ODS, or password-protected files.

This version comparer does not compare formatting, charts, pivot tables, comments, named ranges, macros, formula recalculation, external-link resolution, author identity or timestamps. For reordered rows, use the separate local beta for reconciliation by ID.

Privacy by architecture

Your Excel files stay in your browser

The selected files are read into browser memory for comparison. WorkbookDiff does not upload workbook bytes or persist them in cookies, local storage, IndexedDB, or page URLs.

WorkbookDiff sends allow-listed anonymous counters for broad traffic source, selected comparison task, comparison start/completion, CSV export, private-draft download, checkout opening, and successful report authorization. Cloudflare stores daily aggregates without filenames, worksheet names, cell addresses or values, formulas, workbook bytes, notes, report IDs, purchase codes, email addresses, or user profiles.

Frequently asked questions

Before you compare Excel files

How do I compare two Excel files online?

Choose the original XLSX file, choose the updated XLSX file, then select Compare Excel Files. WorkbookDiff lists the supported differences so you can filter them and export a CSV record.

Are my Excel files uploaded?

No. WorkbookDiff reads and compares the selected XLSX files in your browser. The comparison workflow does not upload workbook bytes.

What differences does WorkbookDiff find?

WorkbookDiff detects cell value and formula expression changes, added or removed worksheets, worksheet visibility changes, hidden row and column changes, and used-range changes.

Which Excel file formats are supported?

WorkbookDiff currently supports .xlsx files up to 20 MB each. It does not support .xls, .xlsm, .xlsb, CSV, ODS, or password-protected workbooks.

Does WorkbookDiff compare formatting, charts, or pivot tables?

No. The current comparison focuses on workbook content and structural signals. Formatting, charts, pivot tables, comments, named ranges, macros, and external-link resolution are outside the current scope.

Convert, merge, or split spreadsheet data

Need to prepare data rather than review version changes? Use these browser-local tools. No workbook upload is required.

Excel to JSON Converter CSV to JSON JSON to Excel Merge Excel Files Online Split Excel File Online

After preparing your files, return to the comparison tool or explore the one-time audit handoff report.

Learn how to compare two Excel files online, detect formula replaced by value changes, or match reordered rows by ID in the local beta. See free features and proposed plans before choosing a recurring workflow.

Compare Excel files · CSV to JSON Converter · JSON to Excel Converter · Excel to JSON · Merge Excel Files · Excel Splitter

Compare guides

Choose the guide for your comparison task: Compare Excel files without uploading · Compare Excel formulas and detect formula replaced by value changes · Export an Excel difference report CSV · Compare two Excel files · Excel diff for XLSX workbooks · Compare Excel files on Mac.