Compare two PDF files
VS renders both PDFs the way your browser’s PDF engine does, matches the text on each page and highlights what was inserted, removed or rewritten. Pages without extractable text are compared pixel by pixel instead.
Features & FAQ
- Real PDF rendering with selectable text, not a plain text dump
- Text changes highlighted in place on each page
- Pixel fallback for scanned or image-only pages
- CJK documents supported out of the box
Frequently asked questions
- Do my PDFs get uploaded?
- No. Pages are rendered locally with PDF.js; the file never leaves the browser.
- How are scanned PDFs handled?
- When a page has no extractable text, VS compares the rendered page images, so stamps, signatures and other visual edits still show up.
- How large can the files be?
- Multi-megabyte PDFs are fine. Only the pages you scroll to are rendered, so long documents stay usable.