Compare two PDFs

Check which pages belong together

Choose the original first and the revision second. The tool matches likely page pairs and lists unmatched pages as additions or removals.

Confirm any uncertain pair before relying on its findings. A missing page should not make every later page appear changed simply because its page number has shifted.

Read the findings in context

Text findings show added, removed or replaced words. Layout findings cover moved text or changed page sizes and rotation. Visual findings show differences in pictures, colour and other page artwork.

Open the paired pages and inspect each relevant area. Small rendering differences can resemble a visual change, and a change in position can matter even when the wording is the same.

Treat scan recognition as a reading aid

Pages without a text layer are compared visually. You can choose a language and run local OCR on up to ten matched page pairs to help identify wording changes.

OCR may misread names, numbers, dates, handwriting or faint print. Check the page images even if the recognised words appear equal. Pages where recognition is unavailable remain visual-only.

Open and acknowledge each pair marked for review before exporting the report. This records that you have reviewed the pair, not that OCR was accurate.

Keep the report with both PDFs

The job accepts two unlocked PDFs, up to 100 pages each and 40 MB together. Neither source is overwritten. Export a PDF report to read or share, or JSON for use in another system.

The report identifies both source files and the page pairs, findings, settings and limitations. Keep those sources beside it so someone else can check a finding. The comparison does not authenticate a document or validate a digital signature.