Guides/Fingerprint PDF
How to fingerprint pdf free — no upload, no watermark
Integrity check with Web Crypto. Any byte change yields a different hash. This guide is for ProMaxPDF on promaxpdf.pro. The file never leaves your browser — students and businesses use the same local engine.
- Open the tool. No account. The page loads the editor in your browser.
- Add files. Drop files onto the page. They are read locally and never uploaded.
- Hash. Copy the fingerprints and store them separately from the file.
- Download. The result is saved to your device. Nothing is stored on a server.
FAQ
Which hash should I use?
SHA-256 for anything serious. MD5/SHA-1 are for legacy comparison only.
Are files uploaded?
No. Hashing uses Web Crypto in this tab.
Is this leak tracking?
This version is cryptographic hashing. Invisible per-recipient marks are not included.