Free tools · TLS
SSL certificate checker
See expiry, issuer, subject, days left and SAN names for a public domain’s HTTPS certificate — before browsers start warning visitors.
Why SSL checks matter
Catch expiring HTTPS certificates before customers do
An expired or mismatched SSL certificate is one of the fastest ways to lose trust and sales. Browsers flag “Not secure”, payment flows fail, and SEO crawlers treat the site as unhealthy. This free SSL certificate checker gives you a quick snapshot of expiry, issuer and SAN coverage for any public domain.
Use it after installing Let’s Encrypt, moving hosts, adding a www/non-www pair, or launching a new shop. Pair it with the free HTTP status checker for redirects and HSTS, and the DNS tool if mail or name servers changed at the same time.
Jamie Freeman is a UK web designer and developer — WordPress, WooCommerce, custom PHP and managed hosting. Free tools help you diagnose; paid work is for getting SSL, DNS and the site itself set up cleanly.
FAQ
SSL checker FAQs
What does this free SSL checker show?
It connects to the public HTTPS endpoint for a domain and reports certificate expiry, days remaining, issuer organisation, subject common name, and Subject Alternative Names (SANs). That is the same core data you need before a cert renewal or after a host move.
Why do SSL certificates expire?
Public certificates have a fixed lifetime (often 90 days with Let’s Encrypt, or up to about a year with commercial CAs). When they expire, browsers show scary warnings and many customers leave. Checking days left after launch or a migration avoids surprise downtime.
What are SANs on an SSL certificate?
Subject Alternative Names list the hostnames the certificate is valid for — for example example.com and www.example.com. If a hostname is missing from SANs, browsers will not trust HTTPS for that name even if the cert is not expired.
Is this the same as an A+ SSL Labs grade?
No. This tool is a practical expiry and identity snapshot for site owners. Full protocol and cipher grading (Qualys SSL Labs style) is a deeper lab test. Use this checker for renewals and cutovers; use a full scanner when you need a security audit.
Can you manage SSL on my UK hosting?
Yes. Managed UK hosting from Jamie Freeman includes SSL setup, renewals and monitoring as part of keeping sites online — see hosting services or book a free call.
Need SSL, DNS and hosting handled?
UK hosting with SSL, backups and plain-English support — or a full site build with certificates done properly at launch.
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