Verify a signed PDF
Check that a document signed with Okaysize is authentic and hasn't been changed since everyone signed.
Only its fingerprint (SHA-256) is checked. The file stays on your device.
How it works
When signing is complete, Okaysize records the SHA-256 fingerprint of the signed PDF. Your browser computes the fingerprint of the file you choose and asks whether it matches. Change even one character in the PDF and the fingerprint is completely different, so a match proves the file is exactly what was signed.