Certificate utilities

SSL Tools

Secure, focused tools for everyday certificate work.

Inspect validity, issuer, expiry and live TLS details.

Create a certificate signing request and matching private key, with SAN support.

Combine a certificate, private key and optional chain into a password-protected PFX.

Extract certificates and a private key from PFX/P12, with optional CSR generation.

Decode and inspect a certificate signing request.

Inspect X.509 certificate identity, validity, extensions and fingerprints.

Create DNS CAA records from an uploaded certificate and its issuing authority.

Find HTTP mixed-content references on an HTTPS webpage.

Confirm that a certificate, CSR and private key belong together.