Compare PDFs
Compare the text of two PDFs page by page and see which lines were added or removed.
PDF documents Client-side Per-page text / pixel diff
Tool preview
How to use it
- 01
Drop the original.
- 02
Drop the changed version.
- 03
Read the line diff.
Limitations
- ! Only extracted text is compared; layout, images and formatting are ignored.
- ! Scanned PDFs have no text layer, so they compare as empty.
- ! Text is extracted from the first 60 pages only, which keeps the diff readable in a browser.
FAQ
Does it show who changed what?
No, it compares two states; use tracked changes in the authoring tool for attribution.
Why is the diff empty for a scanned file?
A scan is an image; run OCR first to give it a text layer.
Are files uploaded?
No.
Files never leave your device
Processing happens in your browser using the File API, WebAssembly and Web Workers. There is no upload endpoint.
Technical details
- Processing
- Client-side
- Implementation
- Per-page text / pixel diff
- Category
- PDF documents
- Network requests
- None while processing