Compare PDF Online for Free
Find what changed between two PDF documents using ToolMint. Use semantic text diff to spot word-level insertions and deletions, or switch to visual overlay mode to compare pages pixel by pixel. Download a full change report when done.
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How to Compare Two PDFs
1
Upload two PDFs
Load the original PDF and the revised PDF you want to compare.
2
Choose comparison mode
Select text diff to see semantic changes, or overlay mode to spot visual page differences.
3
Review changes
Browse the highlighted differences side by side across all pages.
4
Download report
Export a change report summarizing all detected insertions, deletions, and modifications.
Frequently Asked Questions
- What types of changes can this tool detect?
- The text diff engine detects word-level insertions, deletions, and substitutions. The overlay mode highlights pixel-level visual differences between pages.
- Does it work on scanned PDFs?
- Text diff requires selectable text in the PDF. Scanned image-only PDFs will not yield text differences, but the visual overlay mode still works for them.
- Can I compare PDFs with different page counts?
- Yes. Pages are matched by order. Extra pages in either document are flagged as entirely added or removed.
- Can I download the comparison results?
- Yes. Export a change report as a PDF or plain text document summarizing all differences found between the two files.
- Are my PDFs uploaded to a server?
- No. Both PDFs are processed entirely in your browser. Your documents never leave your device.