Compare PDFs
See what changed in a revision, page by page.
Drag in the two PDFs to compare, or click to chooseTap to choose the two PDFs to compare
Sorted by name: previous → new · one at a time works tooExtract text (OCR)
Recognition models download on first use. Images up to 30MB; up to 20 PDF pages per run. Check the result for recognition errors.
Accurate mode downloads a larger model. Check similar characters and URLs against the original. Selectable PDF text is extracted directly.
Compare two PDFs
Compares the same page numbers visually. Inserted or reordered pages are not aligned automatically. Each PDF: up to 50MB and 20 pages. Red highlights visual differences, not semantic meaning.
Open source and model licenses
How to Use
Drag in the previous and new PDF together (sorted by name: previous → new), or one at a time. Comparison starts as soon as there are two.
The page list shows Changed/Same and the share of changed area. Pick a page to see differences highlighted in red on the new PDF.
The changed text range appears side by side below. Save the highlighted view as a PNG to share.
FAQ
What differences does it find?
It overlays pages with the same number, marks differing pixels in red and shows the changed range of extracted text. It does not judge whether the meaning is the same.
What if a page was inserted?
Pages are paired by number, so an inserted page makes every later page show as changed. Split the PDF to compare the relevant range.
How many pages?
Up to 50 MB and 20 pages per PDF.
