Prove a PDF hasn't been altered

Need to prove a document is genuine and unchanged since it was signed? Verify it by file or by its verification code against the signed original — free for everyone, including people you send documents to.

Open the Verify page
Upload the PDF, or enter its verification code
We re-hash the file and compare it to the signed original
See whether it matches — and who signed it and when

Confirms the file matches its signed original byte-for-byte
Detects any edits made after signing
Free for everyone — recipients don't need an account
Backed by a SHA-512 tamper-evident hash

How does verification work?

Documents signed on VersoPDF get a SHA-512 hash and a verification code. We re-hash your file and compare it to the original to confirm it wasn't altered.

Is it really free?

Yes. Verifying a document by file or code is free for everyone, with or without an account.