🔍 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

Ignore Whitespace

Case Sensitive

Show Line Numbers

Analyzing PDFs... 0%

Comparison Results

Match

Differences

Pages (File 1)

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

Upload the first PDF file (original version)
Upload the second PDF file (modified version)
Select comparison options (whitespace, case sensitivity, line numbers)
Click "Compare PDFs" to analyze both documents
Review the differences highlighted in the results section
View side-by-side page previews and detailed text differences
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.