PDF Merger
Combine multiple PDF documents in your chosen order.
PDFPDF tools
Compare PDFs
View rendered pages and highlight visual differences.
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How to use compare pdfs
- Upload the earlier PDF and a second PDF, up to ten page pairs.
- Compare pages to render before, after and highlighted differences.
- Review each highlighted area and download the difference images.
Work through an example
View rendered pages and highlight visual differences.
Compare PDFs: a practical guide →Formats, privacy, and practical limits
Compares up to 10 page pairs at preview resolution. It does not prove document identity, detect hidden data or provide a legal redline.
Files and generated results exist only for this tab session. Download any result you want to keep before leaving the page. Browsers may use temporary memory or disk cache while processing.
Frequently asked questions
What should I check before using Compare PDFs?
Compares up to 10 page pairs at preview resolution. It does not prove document identity, detect hidden data or provide a legal redline.
Are my uploaded files sent to a server?
This tool processes files in your browser. Its processing libraries and any required OCR language model are downloaded when needed; document contents are not uploaded to ERITHRA.