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Compare PDF Files

Side-by-side visual diff of two PDFs page by page. Pro feature.

How to use Compare PDF Files

  1. Upload two versions of a PDF — the original and the revised copy.
  2. The tool highlights text that was added, removed, or changed between the two.
  3. Review the diff to spot contract changes, redline edits, or accidental alterations without reading both documents side by side manually.

Limitations

  • Works on the text layer — differences that are purely visual (e.g., a re-flowed layout with identical wording) may show as changed even when the meaning is the same.

About this tool

Compare PDF Files is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.

Category: PDF & Document Tools. Browse more PDF & Document Tools tools.