SSL Tools · Check SSL Certificate
Look up any site’s certificate
Read the issuer, the validity dates and every name a live certificate covers.
- Free
- No sign-up
- Nothing you paste is stored
Read the certificate a live site is serving right now - who issued it, when it expires, and every name it covers.
You get back
- Common name and any additional names on the certificate
- Issuing authority and certificate type
- Valid-from and valid-to dates
- Whether the chain your server sends is complete
Checking before you renew
Run this against a site a few weeks before its certificate expires and you will know exactly what you are replacing: which authority issued it, which names it covers, and whether the existing installation had a chain problem worth fixing at the same time.
Checking someone else's server
Everything this reads is public - it is the same information any browser sees when it connects. You can point it at any host without permission, and nothing you check is recorded.
Other tools
All seven →- SSL Checker Is the certificate installed, trusted, and served with the right chain?
- Certificate Decoder Paste a certificate and read what is actually inside it.
- CSR Generator Build a certificate signing request without touching OpenSSL.
- CSR Decoder Check the details in a CSR before you send it to the CA.
- Key Matcher Confirm a certificate, its CSR and its private key belong together.
- Server Checker What software your server runs, and which protocols it accepts.
Found a problem you would rather not fix yourself?
Send us the domain and the error. Our engineers install and troubleshoot certificates on any platform we sell for.