Tools / Certificate decoder

Certificate decoder

See what is inside a certificate: names, validity, issuer, validation type and fingerprints.

A certificate is public. We do not store what you paste here.

By API or with AI assistants. This check is available in the public API (certificate/decode) and on the MCP server as decode_certificate.

curl -X POST https://digitaltrust.pt/api/v1/certificate/decode -H "Content-Type: application/json" -d @request.json

API and MCP documentation.

Other tools

More checks, no sign-up.

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Check your certificate request before you send it: names, organisation, key and signature.

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Create the private key and the CSR in your browser, or copy a ready-made OpenSSL command.

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Tell us where the certificate is going (Plesk, nginx, Windows, HAProxy, Java) and get the right files. PEM, DER, P7B and PFX, without the key leaving your computer.

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Check SPF, DKIM, DMARC, BIMI, MTA-STS and TLS-RPT for your domain in one test.