Compare PDF
Spot the differences between two versions of a PDF, word by word or visually overlaid.
How to compare two PDF files
- Drop the original PDF and the revised PDF; drag to swap them if the order is wrong.
- Click Compare PDFs. Removed words are tinted red and added words green, page by page.
- Switch to Visual to overlay the pages, then download the report as a .txt file.
Frequently asked questions
What kinds of differences does it find?
Text changes down to the word: added, removed and changed words on every page, plus a visual overlay that reveals moved images, layout shifts and changes in scanned pages.
Can I compare scanned PDFs?
The text comparison needs a text layer, so run scans through OCR PDF first. The Visual view works on any PDF, scanned or not.
What if the two PDFs have different page counts?
Pages are compared by position: page 3 against page 3. Extra pages are reported as present in only one file. If a page was inserted early on, everything after it will show as changed.
What is in the report?
A plain-text summary with the number of changed pages, words added and removed, and for every page the exact words that were removed (−) and added (+).
Are my files uploaded anywhere?
No. The whole tool runs inside your browser using JavaScript. Your files stay on your device, nothing is sent to a server, and nothing is stored. You can even use it offline once the page has loaded.