SSL / TLS Certificate Checker & Expiry Inspector
Verify SSL validity, remaining days, certificate authority, TLS protocol versions, and full trust chain.
What this SSL & TLS Inspector validates
This SSL/TLS inspector initiates a secure cryptographic handshake with your domain to assess certificate validity, expiration dates, protocol versions, cipher suites, and the intermediate certificate chain. An expired or misconfigured certificate breaks browser trust, triggers interstitial security warnings, causes instant traffic drops, and harms search engine rankings. Monitoring your certificates continuously protects your business from unexpected lapses.
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Frequently Asked Questions
Most automated certificate authorities (such as Let’s Encrypt) renew at 30 days before expiration. If your certificate expires in fewer than 14 days, automated renewal may be failing and requires immediate inspection.
The certificate chain connects your domain’s leaf certificate to a trusted root certificate authority via intermediate certificates. If an intermediate is missing from your server configuration, mobile devices or older browsers will reject the connection.
TLS 1.3 eliminates obsolete cipher algorithms, mandates forward secrecy, and completes handshakes in a single round trip (1-RTT or 0-RTT), significantly accelerating page speed and improving security.
Yes. Modern browsers display full-screen warning interstitials when a certificate expires, blocking crawlers and visitors alike. If downtime persists, search engines de-index pages or drop rankings.