Compare PDF Files Online

Find what changed between two versions of a PDF. DiffNow extracts the text of both files and shows them side by side, with changed lines, words, and characters highlighted.

How to use it

  1. Click Upload First File and Upload Second File, and pick the two PDF files.
  2. Click Compare to see both versions side by side with the differences highlighted.
  3. Use Share to send a link to the comparison, or download it as an HTML report.

Questions

Does DiffNow compare images and layout in PDFs?

No. DiffNow compares the text of the PDF files. Changes to images or page layout alone are not shown, and scanned PDFs without a text layer can't be compared.

Is there a size limit?

Free comparisons accept files up to 2 MB each; DiffNow Premium raises the limit to 8 MB.

Can I compare PDF files on my own computer?

Yes, with ExamDiff Pro, the desktop tool that powers DiffNow, with no file size limits. It also compares Word, Excel, and PowerPoint files.