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Find differences between two PDF documents

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Comparison Complete

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Comparison Notes
What gets compared:
  • Text content differences
  • Added text (highlighted in green)
  • Removed text (highlighted in red)
  • Page-by-page analysis
Common uses:
  • Contract revisions
  • Document version comparison
  • Legal document changes
  • Academic paper edits

Compare PDF Files Online — Complete Guide

Find differences between two PDF versions of contracts, specs, and reports. PdfPeaks highlights changes so reviewers can approve revisions faster and avoid missing edits in long documents.

How It Works

Upload the original and revised PDFs, start comparison, and review the diff output. Added, removed, or changed regions appear in the results view depending on document type. Download a comparison report or annotated PDF when available.

  • Step 1 — Upload: Select baseline and updated PDF files.
  • Step 2 — Compare: Run analysis — large files may take longer.
  • Step 3 — Review: Inspect highlighted changes before approval.

Security & Privacy

Files are encrypted in transit and deleted after processing — see our Privacy Policy for details.

Common Use Cases

  • Legal: Track redlines between contract drafts.
  • Engineering: Verify drawing revision marks in PDF exports.
  • Compliance: Confirm policy PDFs match approved text.
  • Publishing: QC layout changes between proof rounds.
  • Software docs: Validate release notes against prior version.

Tips for Best Results

Comparison quality depends on whether PDFs contain real text vs flat scans. Input: two PDF files.

Frequently Asked Questions

Text differences between an Original and a Revised PDF — wording that was added, removed, or changed. It is not a pixel-by-pixel graphic proof for scanned letterhead art.

Yes for a useful diff. Image-only scans should run Make PDF Searchable first, or the comparison will see little or no text.

This page takes exactly two uploads per run. Chain runs if you have a third revision.

Yes for standard use. Files are encrypted in transit and deleted after processing. See the Privacy Policy for details.

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