Compare PDF Online Free
Show a side-by-side document comparison and pinpoint every text addition, deletion, or modification between two PDFs. 100% private client-side processing in your browser with zero server uploads.
Click to select files or drag & drop here
Supported formats: application/pdf • Processed 100% locally in your browser
How to Use Compare PDF Online
Select Original & Revised PDFs
Upload the two PDF versions you want to compare.
Run Page-by-Page Diff Analysis
Our engine extracts and compares every line across both documents.
Inspect Highlighted Changes & Export Report
Review added (green) and removed (red) lines side by side and download a Diff Report PDF.
Frequently Asked Questions — Compare PDF
How do I select both PDF files?
Select 2 PDF files at once (or upload them one after another) to run the comparison.
Does it show which page a change occurred on?
Yes, differences are grouped page by page with exact counts of added, removed, and unchanged lines.
Can I download the comparison report?
Yes, you can export a clean PDF Comparison Report summarizing all changes.