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PDF Compare

Spot differences between PDFs

Free forever — no sign-up, nothing uploaded. Files never leave your device.

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PDF Compare

Spot differences between PDFs

Drop your file here

or browse from your device

Browse files

document.pdf

1.2 MB

report.pdf

860 KB

100% private

Nothing is uploaded — everything runs in your browser.

Free forever

No account or payment required.

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Open the tool and start using it right away.

Local processing

Processing time depends on your input and device.

About this tool

Upload two PDFs and get a page-by-page pixel diff with changed regions highlighted in red.

PDF Compare is a side-by-side document comparison tool that highlights the differences between two PDF files. Essential for legal professionals reviewing contract revisions, editors checking document changes, or anyone who needs to identify what's different between two versions of a PDF, this tool provides a clear, visual diff that shows additions, deletions, and modifications between documents.

The tool performs a detailed comparison of both text content and visual layout, presenting changes in an easy-to-read format with highlighted differences. Whether you're verifying that only intended changes were made, checking for unauthorized modifications, or simply need to see what changed between document versions, PDF Compare delivers accurate, comprehensive results entirely within your browser. No sensitive documents are ever uploaded to external servers.

Key features

Everything you get with PDF Compare — no premium upsell.

Compare two PDFs and highlight all differences

Detect text changes: additions, deletions, and modifications

Visual layout comparison for formatting changes

Side-by-side and overlay comparison views

Generate a summary report of all changes found

100% client-side comparison with no file uploads

How to use PDF Compare

Follow the steps below to use the tool.

  1. 1

    Upload Original PDF

    Drag and drop the original or base version of your PDF document.

  2. 2

    Upload Modified PDF

    Upload the second version of the PDF that you want to compare against the original.

  3. 3

    Run Comparison

    Click compare to analyze both documents and identify all differences.

  4. 4

    Review Changes

    Examine the highlighted differences in the side-by-side comparison view.

Still free, still private — your files never leave your device.

Launch PDF Compare

Frequently asked questions

Quick answers before you launch the tool.