What kinds of differences does this detect?

Visual diff highlights any pixel-level change (moved elements, added/removed images, layout shifts). Text diff highlights added or removed words, useful for catching wording changes that a visual scan might miss.

What happens if the two PDFs have a different number of pages?

You can still navigate to any page in either document — a page missing from one file is shown as empty in the comparison instead of causing an error.

Does this tool upload my PDFs anywhere?

No — both files are rendered and compared entirely in your browser with pdfjs-dist; nothing is sent to a server.

Compare PDF Files

Compare two PDF files side by side and see exactly what changed, page by page.

Document A

Drop a file, paste, or click to browse

Up to 50 MB.

Document B

Drop a file, paste, or click to browse

Up to 50 MB.

Files never leave your device — both PDFs are rendered and compared entirely in your browser.

Related tools

How it works

1
Choose Document A and Document B
Two separate PDFs, up to 50 MB each.
2
Pages render side by side
Differences are highlighted in red on a visual overlay.
3
Switch to Text Diff for wording changes
See exactly which words were added or removed on each page.

FAQ

What kinds of differences does this detect?: Visual diff highlights any pixel-level change (moved elements, added/removed images, layout shifts). Text diff highlights added or removed words, useful for catching wording changes that a visual scan might miss.
What happens if the two PDFs have a different number of pages?: You can still navigate to any page in either document — a page missing from one file is shown as empty in the comparison instead of causing an error.
Does this tool upload my PDFs anywhere?: No — both files are rendered and compared entirely in your browser with pdfjs-dist; nothing is sent to a server.
Is there a file size limit?: Each PDF can be up to 50 MB.