- 1Upload
- 2Configure
- 3Download
Compare PDF
Spot the differences between two versions of a document.
Original
Drop the original PDF
Revised
Drop the revised PDF
How to compare two PDFs
- 1Upload the two versions of the PDF you want to compare.
- 2PaperJamm lines up each page and highlights what's different between them.
- 3Review the differences on screen, page by page.
Frequently asked questions
Can I download a marked-up version showing the differences?
Not currently — Compare PDF is an on-screen diff viewer, so you review changes in the browser rather than exporting a combined file.
What kind of changes does it detect?
It compares the text content of each page and highlights additions and removals, so it's best for spotting wording changes rather than purely visual or layout differences.
What if the two PDFs have a different number of pages?
Pages are compared by position, so if pages were inserted or removed partway through, later pages may line up incorrectly — this works best when the two versions are closely aligned.
Can I compare PDFs with scanned pages?
Only text is compared — a page with no extractable text (like a pure scan) won't show meaningful differences. Run it through OCR PDF first if you need to compare scanned pages.