Drop in the old and new versions. This tool lines them up side by side and marks every added, removed, and changed passage — inside your browser, with no server and no account.
or choose a file
or choose a file
Drop the older PDF on the left and the newer one on the right. They open inside the page using your browser's own PDF engine.
Text is read line by line and matched up, then each page is drawn and checked pixel by pixel, all on your device's own processor.
Step through changes in text view, flip to page view to see layout and image differences, and save a report if you need one.
Contracts, proposals, and policy revisions are exactly the files you shouldn't hand to a third-party server just to see what changed.
Page view highlights moved images, changed numbers in scans, and layout shifts that a plain text comparison can't see.
Once this page is loaded, comparing files doesn't need the network again.
No. Both files are read and compared inside your browser tab. Nothing is sent to a server, and closing the tab discards everything.
Two checks run together. Text view extracts the text of each PDF, matches lines, and highlights the exact words that were added or removed. Page view renders every page and flags the pixels that differ, so layout and image changes are caught too.
Yes, through Page view. Scans contain pictures rather than text, so the text comparison has nothing to read, but the visual comparison highlights what changed on each page. It does not run OCR.
Re-exporting can shift line breaks, fonts, or spacing without changing the wording. If text view looks noisy, turn on "Ignore capitalization" and check Page view to confirm whether the pages really look different.
They are still compared. Pages that exist in only one file are shown against a blank page and counted as different, and text on those pages appears as added or removed.
There is no upload limit because nothing is uploaded. The practical limit is your device's memory. Documents of a few hundred pages work on most computers; very large files may be slow on phones.
No. Remove the password in the app that created the file, then compare the unlocked copies.
It works in current versions of Chrome, Edge, Firefox, and Safari. After the page has loaded once, no further network access is needed for comparing files.