SSL Certificate Inspector

Enter any domain name and retrieve the live SSL/TLS certificate details straight from the server. The tool shows the full certificate chain, expiry countdown, issuer and subject information, all Subject Alternative Names (SANs), SHA-256 fingerprint, signature algorithm, and a clear validity status. Unlike AI tools, this fetches real-time data from the actual server — making it indispensable for developers, sysadmins and security engineers who need to verify certificate deployments, debug HTTPS issues, or monitor upcoming expirations.
Live Certificate Fetch Full Chain Inspection Expiry Countdown SANs Overview SHA-256 Fingerprint
Quick Examples 
CHECK: Inspect github.com to see its full certificate chain
EXPIRY: Check how many days before your domain certificate expires
SANS: Verify which subdomains are covered by a wildcard certificate

SSL Certificate Inspector

Enter any domain name and retrieve the live SSL/TLS certificate details straight from the server. The tool shows the full certificate chain, expiry countdown, issuer and subject information, all Subject Alternative Names (SANs), SHA-256 fingerprint, signature algorithm, and a clear validity status. Unlike AI tools, this fetches real-time data from the actual server — making it indispensable for developers, sysadmins and security engineers who need to verify certificate deployments, debug HTTPS issues, or monitor upcoming expirations.

Domain Settings
Enter a hostname — no https:// needed.
Quick Examples
What is inspected?
  • Certificate validity & expiry date
  • Issuer & certificate authority
  • Subject Alternative Names (SANs)
  • SHA-256 & SHA-1 fingerprints
  • Full certificate chain
  • Key type, size & algorithm

Help & Related Tools

Everything you need to know

FAQ Frequently Asked Questions

What information does the SSL Certificate Inspector show?
The tool retrieves and displays the full certificate chain including the end-entity certificate, intermediate CA, and root CA. For each certificate you see the subject (Common Name, Organisation), issuer, validity period with expiry countdown, all Subject Alternative Names (SANs), the SHA-256 fingerprint, signature algorithm, key size, and serial number.
How do I use the SSL Certificate Inspector?
Simply type or paste a domain name (e.g. github.com or sub.example.com) into the input field and click Inspect, or press Enter. The tool connects to the live server and retrieves the actual certificate in real time. You can also check a specific port by appending a colon and port number (e.g. example.com:8443).
Why is this better than asking an AI chatbot?
AI language models cannot make live network connections and have no access to real-time certificate data. They can only describe how SSL works in general terms. This tool fetches the actual certificate from the real server at the moment you click Inspect, giving you accurate, up-to-date information including the exact expiry date and current chain status.
Is this tool safe to use with internal or sensitive domains?
The tool queries publicly accessible domains over standard HTTPS port 443. No certificate data is stored or logged. For internal domains that are not reachable from the public internet, the lookup will time out — those require an on-network tool.
What does the expiry status colour coding mean?
Green means the certificate is valid and expires in more than 30 days. Yellow means it expires within 30 days and should be renewed soon. Red means the certificate has already expired or expires within 7 days and requires immediate action. Grey means the check could not be completed.

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