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PDF Compare

Compare two PDFs side-by-side. See text differences and visual changes instantly — 100% client-side.

↔ Side-by-Side ✎ Text Diff 👁 Visual Overlay
Upload PDFs
Original PDF
📄
Drop original PDF here
or click to browse
Modified PDF
📄
Drop modified PDF here
or click to browse
Comparison Results
0 additions 0 deletions 0 / 0 pages changed 100% similar
Page 1 / 1
Original
Modified
How to Use
1. Upload your original PDF on the left and the modified version on the right.

2. Compare — the tool extracts text and renders pages for both documents.

3. Text Diff highlights additions (green) and deletions (red) side-by-side.

4. Visual Diff overlays rendered pages to show pixel-level differences.
Tips
  • ✓ Works best with text-based PDFs (not scanned images)
  • ✓ Visual diff shows layout and formatting changes
  • ✓ Text diff shows content-level additions and deletions
  • ✓ Use page navigation to step through multi-page documents
  • ✓ 100% client-side — nothing is uploaded

Compare PDFs Online for Free

The AfroTools PDF Compare tool lets you diff two PDF documents side-by-side directly in your browser. Whether you need to review contract changes, compare document drafts, or verify edits, this tool highlights every addition, deletion, and modification at both the text and visual level.

Everything runs locally in your browser. Your PDF files are never uploaded to any server, ensuring complete privacy and security for sensitive documents.

Frequently Asked Questions

How does the text diff work?
The tool extracts text from each page of both PDFs, then uses a diff algorithm to find additions, deletions, and unchanged sections. Results are displayed side-by-side with color-coded highlights.
What does the visual diff show?
Visual diff renders both PDF pages as images and uses pixel-level comparison to highlight areas that differ between the two documents. You can also use a slider to blend between original and modified versions.
Is my PDF uploaded to a server?
No. All processing happens entirely in your browser using JavaScript. Your PDFs never leave your device.
Can I compare PDFs with different page counts?
Yes. The tool compares pages that exist in both PDFs. Extra pages in either document are flagged as entirely added or removed.