Compare two PDFs

How to compare PDFs

1. Choose the first file (the original) and the second (the new one).
2. Press "Compare".
3. Read the list of changed text and look at the pictures of the pages that differ. To keep them, press "Save the differing pages as a PDF".

Your files stay on your device

This tool opens both files from your device and compares them in your browser. Nothing is uploaded, and neither the files nor the result is kept (close the page and the result is gone).

Good to know

• The text comparison uses the text inside the files. A line that moved or was reordered counts as removed and added. Documents in columns or with tables may be lined up differently from what the eye sees. A scan made of pictures has no text to compare: run OCR first, or use the picture comparison.
• The picture comparison draws the pages. If the two files differ only in the font or are shifted by a few points, almost the whole page can differ. The "% differs" figure is counted over the pixels that have ink in either page. A page of a different size is scaled to match before comparing.
• Only the first 80 pages are compared as pictures (the text is compared for all pages).
• A file locked with a password must be unlocked first.

Report a problem or suggest an idea

Found a problem, or want this tool to do more? Tell us on the feedback page. No sign-up needed.