Upload a document signed with GhostSign to confirm it hasn't been altered since signing and to check the signing order. The check runs entirely on your device.
GhostVerify checks whether a signed PDF has been tampered with. Every document signed with GhostSign carries a SHA-256 audit certificate; multi-signer documents add a chain-hash that links each signer's contribution to the previous one. Upload the signed file and GhostVerify recomputes the hash in your browser — if a single byte was changed, the hashes won't match. The verification is entirely client-side, so the document you're checking is never uploaded to a server.
Upload the signed PDF
Add a document that was signed with GhostSign. It's read in your browser only.
We recompute the hash
GhostVerify recalculates the SHA-256 hash and compares it to the embedded audit certificate.
See the result
A match confirms integrity and, for multi-signer docs, the signing order. Any change breaks the hash.
What does verification prove?
That the signed PDF hasn't been altered since it was signed. The embedded SHA-256 hash is recomputed and compared; if any byte changed, the check fails.
Is my document uploaded to verify it?
No. The hash is recomputed entirely in your browser, so the document you're checking never leaves your device.
Can I verify the order multiple people signed in?
Yes. Multi-signer documents include a chain-hash linking each contribution to the previous one, so reordering or insertion is detectable.
Everything runs in your browser. Your files are never uploaded — for the single-file tools there's no upload endpoint to send them to.
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