PDF Comparison
Compare two PDF files visually and textually, jump through changed pages, and ex...Compare two PDF files visually and textually, jump through changed pages, and export a local comparison report.
Diff Studio
Compare two PDFs visually and textually before sharing the new version.
Render pages side by side, flag changed pages, inspect text deltas, and export a lightweight comparison report locally.
Compared
Run
Changed
0
Max diff
0%
Comparison mode
Choose the review lens before running the diff.
PDF pair
Upload the original and revised files. PDF bytes stay here.
Original PDF
Drop or browse a PDF
Revised PDF
Drop or browse a PDF
Difference board
Preview the current page, diff heatmap, and detected change counts.
Page 1 of 1
Original
Upload PDFs to preview this page.
Revised
Upload PDFs to preview this page.
Diff heatmap
Upload PDFs to preview this page.
PDF Comparison Features
Why Use PDF Comparison?
Completely Free
No limits, no signup, no premium tiers. Use PDF Comparison as much as you need, forever.
100% Private
All processing happens in your browser. Your data never leaves your device.
Instant Results
Get results in seconds with no waiting, no queues, and no file uploads to slow servers.
Works Everywhere
Fully responsive — works on desktop, tablet, and mobile with no app download needed.
No Installation
Works directly in your browser. No software to install, no plugins required.
Always Available
Available 24/7 from anywhere in the world. Bookmark it and use it whenever you need.
Who Uses PDF Comparison?
For Students
Compare draft submissions, handouts, and research PDFs before turning in final copies.
For Professionals
Review revised contracts, reports, invoices, and client packets without uploading sensitive files.
For Product Teams
Catch spec, screenshot, and export changes before shipping PDF deliverables.
For Everyone
Spot changed pages in manuals, forms, tickets, and shared documents.
How It Works
Upload Pair
Upload the original and revised PDFs. Files are rendered and inspected locally.
Compare Pages
Choose visual, text, review, or audit mode and scan page-by-page differences.
Export Report
Download a lightweight PDF report with changed pages, text counts, and heatmap proof.
Tips
Use Thresholds
Raise the visual threshold when tiny antialiasing or export noise creates too many page flags.
Review Page Counts
When page counts differ, verify inserted or removed pages before trusting page-to-page matches.
Scans Need Visual
Scanned PDFs often have no selectable text, so visual mode is the right first pass.