Visual diff for two PDFs · side-by-side with changes highlighted
Side-by-side visual diff of two PDFs. Renders both, highlights changed pixels per page in red, surfaces a mean-delta %. Great for contract revisions, design reviews, spec change tracking. Browser-only.
Drop your files
Old version (PDF A)
Up to 100 MBFiles stay in your browser
Drop your files
New version (PDF B)
Up to 100 MBFiles stay in your browser
How to visual pdf diff
Three steps. Start to finish in under a minute.
1
Drop both PDFs
One on each side. Order matters: left is the 'old' version, right is the 'new'.
2
Tune sensitivity
Threshold slider controls what counts as a change. Default 20/255 catches real changes while ignoring anti-aliasing noise.
3
Review per-page
Each page shows old | diff overlay | new with the diff % for that page.
Why LovedPDF
Why use LovedPDF for visual pdf diff
Catches what text-diff misses
Layout shifts, image swaps, font changes — pixel-diff catches them all.
Browser-only
Neither PDF ever uploads. Both rendered locally via pdf.js.
Handles different page counts
Pages present in only one PDF are flagged as added/removed.