SSL certificate check
Check certificate chain, domain matching, and TLS configuration.
The live check sends the domain and port to Nyttio's server for the TLS connection. The result is not stored. Local certificate files do not leave the browser.
1. Enter domain and settings
Quick selection
2. Certificate status
Results appear after an SSL check.
3. Certificate information
Results appear after an SSL check.
4. Certificate chain (CA chain)
Results appear after an SSL check.
5. TLS-configuration
Results appear after an SSL check.
6. Security tests
Validity, domain match, chain, TLS version, cipher, and ALPN are checked.
7. Practical tips
Renew early, use TLS 1.2 or 1.3, and monitor the certificate expiry date.
Common use cases
Websites, mail services, APIs, intranets, and load balancers.
Upload certificate (optional)
Identify a local PEM, CRT, or CER container. The file is not uploaded.