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🔍 Compare PDFs

Compare two PDF files side-by-side and detect text differences instantly.

📄 PDF File 1 (Original)
📁
Drag & drop or click to upload
PDF only • Max 50MB
📄 PDF File 2 (Modified)
📁
Drag & drop or click to upload
PDF only • Max 50MB
⚙️ Comparison Options
Analyzing PDFs... 0%
Comparison Results
0%
Match
0
Differences
0
Pages (File 1)
0
Pages (File 2)
PDF 1 - Page 1
PDF 2 - Page 1
Detected Differences
💡 Smart Tips
  • For best results, compare PDFs with similar structure and formatting
  • Scanned PDFs may not be accurately compared (text-based PDFs work best)
  • Large files take longer to process and analyze
  • Enable "Ignore Whitespace" to focus on content differences only
  • Case sensitivity matters when comparing technical documents
  • Download the comparison report for detailed documentation and archiving
📖 How to Use This Tool
  1. Upload the first PDF file (original version)
  2. Upload the second PDF file (modified version)
  3. Select comparison options (whitespace, case sensitivity, line numbers)
  4. Click "Compare PDFs" to analyze both documents
  5. Review the differences highlighted in the results section
  6. View side-by-side page previews and detailed text differences
  7. Download the comparison report as a PDF for documentation
✨ Uses & Benefits
  • Track document version changes and revisions
  • Verify contract modifications and edits
  • Quality control for document updates
  • Legal document comparison and auditing
  • Identify unauthorized changes in PDFs
  • Academic paper revision tracking
  • Compare proposal versions before submission
  • Generate professional comparison reports
🔗 Related PDF Tools
❓ Frequently Asked Questions
Is this tool free?
Yes, completely free with no limitations on file size or comparisons.
Are my files safe?
Yes. All processing happens in your browser. Files are never uploaded to our servers. Your documents remain completely private.
What types of PDFs work best?
Text-based PDFs work best. Scanned PDFs or image-only PDFs may not produce accurate text comparison results.
Can I compare scanned PDFs?
Visual comparison works, but text-level comparison requires OCR-processed or text-based PDFs.
Why is the comparison taking long?
Large PDFs with many pages require more processing time. Files over 100 pages may take several minutes.
Can I export the comparison results?
Yes! Click the "Download Comparison Report" button to generate a professional PDF report with all differences documented.
🔒 Privacy & Security: All file processing happens locally in your browser using PDF.js library. No files are uploaded to our servers. Your documents remain completely private and secure.
⚠️ Limitations & Notes
  • Max file size: 50MB per PDF
  • Text-based PDFs produce accurate results
  • Scanned PDFs require OCR for text comparison
  • Browser memory limits may affect very large files
  • Requires modern browser (Chrome, Firefox, Safari, Edge)
  • JavaScript must be enabled
Disclaimer: This tool is provided for general use. Results may vary based on PDF structure and complexity. Always verify comparison results manually for critical documents. Not a substitute for professional document review.