Verify a document

Local integrity check — nothing is uploaded.

A Foolscap signing certificate prints a SHA-256 fingerprint of the exact document text both parties signed. To check that a document in front of you is unaltered, paste its text below and paste the fingerprint from the certificate. Your browser recomputes the SHA-256 and compares — entirely on this page, with no server and no upload. We never see the document or the result.

1. The document text

Paste the contract text exactly as it was signed (the body, not the certificate block), or load a .txt file.

2. The fingerprint from the certificate

What this does and does not tell you

If the fingerprints match, the text you pasted is byte-for-byte the text that was signed — it has not been altered. If they do not match, the text differs from what was signed (even one changed character changes the whole fingerprint), or it was not pasted exactly.

This is a technical integrity check only. It does not verify identities, confirm that a signature is legally valid or enforceable, or prove who signed — Foolscap is not a law firm and gives no legal advice. There is no central registry: because Foolscap runs no server, verification is something anyone can do locally with the document and its certificate, not a lookup against us.

Foolscap provides general document templates and tooling for convenience only. It is not a law firm and does not provide legal advice. · Back to app · Privacy · Terms