SSL Certificate Checker: Verify HTTPS, Expiry & Chain of
Currently searching our recent dataset of pre-crawled domains to guarantee instant, reliable results without CORS limitations.
Recent SSL Scans
| Domain | Grade | Issuer | Expiry | Protocol |
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Frequently Asked Questions
What is an ssl checker and why do I need one?
An SSL checker is a tool that analyzes your website's SSL/TLS certificate to ensure it is correctly installed, valid, and trusted by browsers. You need it to prevent security warnings that deter visitors, protect user data via encryption, and maintain search engine rankings, as search engines penalize sites without secure HTTPS connections.
How do I check ssl certificate expiry?
To perform an ssl expiry check, simply enter your domain name into an SSL certificate checker tool. The tool will parse the certificate's 'valid_to' date and display exactly how many days are remaining until expiration, allowing you to renew it before it lapses and causes an outage.
Why does my ssl certificate checker show a 'mismatched domain' error?
A mismatched domain error occurs when the domain name you are visiting does not match the Subject Alternative Name (SAN) or Common Name (CN) listed on the SSL certificate. This often happens if the certificate is issued for 'www.example.com' but you visit 'example.com', or if the site is sharing an IP address with another domain without proper SNI configuration.
What does 'chain of trust' mean when I check ssl certificate details?
The chain of trust is a sequence of certificates that links your server's certificate back to a trusted Root Certificate Authority (CA) pre-installed in browsers. A complete chain includes your certificate, one or more intermediate certificates, and the root CA. If intermediate certificates are missing from your server configuration, browsers will display a 'not trusted' warning.
Why is my SSL grade low despite having a valid certificate?
A valid certificate is only part of a secure HTTPS setup. A low grade in an ssl checker usually indicates underlying server configuration issues, such as supporting outdated protocols (like TLS 1.0 or 1.1) or weak cipher suites (like RC4 or DES). Disabling these legacy settings and enforcing TLS 1.2 or 1.3 will improve your grade.
How to Check an SSL Certificate Chain
An SSL/TLS certificate chain includes: your server certificate, one or more intermediate certificates, and a root certificate trusted by browsers. Our checker validates the complete chain — identifying missing intermediates, expired certificates, and misconfigured servers. Enter any domain above to view the full certificate details: issuer, expiration date, Subject Alternative Names (SANs), key type, and chain validity.
Frequently Asked Questions
How do I view an SSL certificate online?
Enter any domain name in our SSL Certificate Checker above. It connects to the server, retrieves the certificate chain, and displays: certificate issuer, validity dates, SANs (Subject Alternative Names), key algorithm, and chain status. No software installation required.