Review changes

Compare PDFs Online Free

Use Compare PDFs when two files look similar but may have changed pages, moved content, missing sections, altered images, or layout shifts after editing or exporting.

The comparison focuses on visible page appearance. It helps with practical review before sending a final copy, archiving a version, or checking whether an export changed the layout.

What this tool helps with

  • Render two PDF versions
  • Compare visible page differences
  • Spot changed layout or missing content
  • Review changed pages locally

Supported formats

  • Input: two PDF files supported by the browser PDF workflow.
  • Output: visual page comparison and review signals where supported.
  • The workflow compares rendered pages, not every hidden PDF object.

Best for

  • Draft-versus-final checks
  • Export quality review
  • Contract and policy version review
  • Finding missing or moved page content

Limits to know

  • This is visual comparison, not legal redline review.
  • It may not detect hidden metadata changes, bookmarks, invisible text, form logic, or attachments.
  • Different page counts, rotated pages, scans, and very large PDFs can take longer to review.

How it works

  1. Open Compare PDFs.
  2. Add the original PDF and the changed PDF.
  3. Render and compare pages visually.
  4. Review changed pages, then decide whether to keep, fix, or share the updated file.

Open Compare PDFs or browse all PDF tools.

Common questions

Does Compare PDFs compare metadata?

No. It focuses on visible page appearance. Use metadata tools for document information and privacy signals.

Can it catch wording changes?

It can help when wording changes are visible on the rendered page. Invisible or hidden text changes may not appear.

Why use visual comparison?

Visual review can catch layout shifts, missing images, moved content, and export mistakes that plain text comparison can miss.

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