Verify a Signed File (.p7m)
Open a digitally signed .p7m file: the signer, codice fiscale, certification authority and dates, whether the document is unchanged since it was signed — and the document itself.
What it does
Verify a Signed File (.p7m) uses the cryptography built into your browser (WebCrypto) — the same standard algorithms your bank's site uses — on a file or a piece of text that never leaves this page.
When you need it
Before sending something sensitive by email or chat, when a file you received must be checked, or when you want to know whether a password or a signature holds up.
Limits and caveats
A strong algorithm is only as safe as the password or certificate behind it, and some checks — whether a certificate was revoked, say — need the issuer's servers, which the page says where it matters. Nothing is stored or logged. Everything happens in your browser, so the file never leaves your device.
How to verify a signed file (.p7m)
- Drop or choose your P7M file.
- KIVO processes it instantly — no waiting for uploads.
- Download the result. That's it.
Frequently asked questions
- Does this make the signature legally valid?
- No. It checks what the file can prove on its own. Whether the certificate was revoked, and whether the authority is on the EU trusted list, needs the authority's servers: use an official verifier for legal purposes.
- Can I get the signed document out?
- Yes: the original file (PDF, Word, XML…) is saved without the .p7m wrapper.
- Do my files get uploaded?
- No. This tool runs entirely in your browser, so the file never leaves your device.