Compare PDFs
Visual & text diff · 100% on-device
Drop PDF here
or click to browse · max 150 MB
Drop PDF here
or click to browse · max 150 MB
Fully local. Both PDFs stay on your device — rendering and diffing happen entirely in-browser via WebAssembly. No server, no upload, no telemetry.
Pixel Diff
Every changed pixel highlighted in red, so visual tweaks — moved logos, colour shifts — jump out.
Word Diff
LCS-based word-level diff, page by page, with additions in green and deletions struck through in red.
Side-by-Side
Three-up layout: original, revised, and diff overlay for a full visual audit.
100% Private
Runs entirely in your browser. Neither PDF is ever uploaded.
Frequently Asked Questions
Visual or text diff — which should I pick?
Visual for contracts, marketing collateral, invoices and anything where layout matters. Text for prose changes where you care about the words, not the pixels.
What if the PDFs have different page counts?
Extra pages are shown on their own with a 'missing' marker on the other side and counted as 100% changed.
Do you upload my files?
No. Both files are rendered and compared entirely in your browser. Nothing is sent to a server.
Any size limit?
Each PDF up to 150 MB. Very large PDFs will take longer to render.