Compare Two PDFs
See exactly what changed between two versions — removed and added text highlighted right on the page, page by page.
How it works
1. Upload the original and the revised PDF. 2. We compare them page by page. 3. For any page that differs, see the original with removed text boxed in red and the revised page with added text boxed in green, plus a word-by-word text diff.
Does this compare formatting or images too?
The red/green highlighting is text-based, so it catches exact wording changes even when a paragraph reflows. For non-text changes — a swapped image, a color or layout change — open "Highlight what changed on the page", which overlays both pages and flags every pixel that differs.
What if the two files have a different number of pages?
Extra pages in either file are flagged as "only in this file" rather than compared against nothing.
Does this upload my files anywhere?
No — comparison runs entirely in your browser. Neither file ever leaves your device.
What about scanned PDFs with no text layer?
The word-by-word diff needs a text layer, so two scanned pages with no extractable text will show as "same" even if the scans look different. For scanned pages, use "Highlight what changed on the page" instead — it compares pixels, not text, so it works whether or not the PDF has real text underneath.
Can it tell if pages were reordered or inserted?
No — pages are compared by position: page 1 against page 1, page 2 against page 2, and so on. If you insert or reorder a page partway through, every page after that point will show as "different" even if the content itself didn't change, since it's now lined up against the wrong page.
Can I compare a PDF to a Word document, or two Word docs?
No, this tool only compares PDF to PDF. If you have a Word file, export or print it to PDF first, then compare the two PDFs.
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