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Browser-based PDF diff

Diff PDFs without Acrobat

Pixel-perfect PDF diff with word-level text view, metadata + form-field compare, ruler, and exclusion zones.

Launch Compare PDF
  • Visual diff
  • Text diff
  • Form fields
  • Exclusion zones
  • Files stay local
Compare PDF showing two engineering blueprints side by side. Rev A on the left, Rev B on the right. Red highlights mark regions where dimension callouts and hole counts changed.
Pictured: blueprint Rev A vs Rev B, every changed region highlighted at pixel level.

How it stacks up

FeatureLoft Compare PDFAdobe Acrobat ProDraftable
Pricing
Annual cost Free $280 $199
Core diff
Visual diff with pixel matching
Word-level text diff modal
Flattened / scanned PDF diff
Form-field comparison
Image / non-text content diff
Metadata / bookmarks / fonts compare
Drag-rect exclusion zones
View modes
Side-by-side overlay slider
Apple-style transparent ruler
Privacy
Files never uploaded
Trade-offs · what we don't do
Annotated diff PDF export
Diff for Word, Excel, PowerPoint

We list trade-offs explicitly. Browser-based + privacy-first means some features that need a server (cloud sync, named-account workflows) won't ship here.

Frequently asked

Text additions, deletions, and modifications are highlighted. Layout and image changes are also shown.

Yes — pick AEC / Blueprint mode. It runs a word-level text pass (dimensions, callouts, title-block revisions) alongside a masked pixel pass for geometry, so a relocated detail reads as "moved" and an in-place dimension change (Ø8 → Ø10) reads as one "modified" entry rather than a delete plus an insert. Each change is tagged with its sheet region and X/Y position.

Yes. The output PDF inherits bookmarks and form fields from the chosen base document; the diff overlay is added as annotations.

PDF 1.0 through 2.0 are diffed page-for-page. Encrypted files need to be unlocked first.

Ready when you are.

Free forever · No sign-up · Files never leave your device.