What this tool does
SSL Certificate Checker inspects certificate and HTTPS details for a public hostname.
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🔒 SSL Certificate Checker
Check public HTTPS/TLS certificate status through Utilito's serverless SSL Labs proxy. See expiry, issuer, endpoint grades, and copy troubleshooting commands.
Network disclosure
- This check sends the public hostname to a Utilito Cloudflare Function and SSL Labs for certificate analysis.
- Use public hostnames only. Do not enter private internal systems, staging hosts, or names that reveal confidential infrastructure.
Enter a public hostname to inspect its certificate.
Privacy and limitations
This tool sends the public hostname to a Utilito Cloudflare Function, which asks SSL Labs for certificate analysis. It does not inspect localhost, private networks, or arbitrary ports. Initial SSL Labs scans can take a minute; use Refresh if the status is queued or in progress.
Why it is useful
It helps verify certificate validity, expiration, issuer, hostname coverage, and deployment issues before users hit browser warnings.
How it works
The tool performs a network-backed check for the hostname and reports certificate-related details exposed by the lookup path.
Best input
Enter a public HTTPS hostname that can be reached from the internet.
Maintenance tip
Check certificates after DNS changes, CDN changes, renewals, and origin migrations.
Privacy note
This network tool sends the hostname for certificate inspection. Do not use it for private internal systems unless you are comfortable with that lookup.
Important limitation
Results can differ for private networks, regional CDNs, mutual TLS, or systems that serve different certificates by client location.
Quick answers
Why does my browser show something different?
CDNs, SNI, redirects, and regional edges can present different certificates.
Does this renew certificates?
No. It only checks information.
Common Use Cases
Check certificate expiry before a launch
Confirm that a public domain has a valid certificate and enough days remaining before shipping a site or API.
Debug browser HTTPS warnings
Inspect issuer, alternate names, and endpoint grades when users report TLS or certificate errors.
Copy local troubleshooting commands
Grab OpenSSL and curl commands for deeper command-line verification.
Network troubleshooting workflow
Pair subnet planning with DNS, headers, redirects, status codes, SSL checks, and webhook debugging.