PDF Compare is a free, privacy-first tool for spotting changes between two PDF documents.
Drop two PDF files — an original and a revised version — and get a clear, page-by-page diff with added text highlighted green and removed text highlighted red.
Your files never leave your device. All text extraction and comparison happens entirely in your browser. No files are uploaded, no data is stored, no account is required.
This makes it safe to use with confidential documents: contracts, legal briefs, financial filings, medical records, or anything you would not want to hand to a third-party server.