Verify your SSL certificate, check TLS versions and cipher suites, detect Heartbleed, POODLE, and other vulnerabilities.
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An SSL/TLS checker connects to a website over HTTPS and inspects its certificate and encryption setup — whether the certificate is valid and unexpired, whether the chain is trusted, which TLS versions and ciphers the server allows, and whether any deprecated, insecure options are still enabled. Secably's checker runs all of this instantly, free, with no signup.
SSL/TLS is the encryption that turns http:// into https://. A certificate proves the site is who it claims to be, and the TLS handshake negotiates how the connection is encrypted. An SSL/TLS checker connects the way a browser would and reports back on both: the certificate's identity and validity, and the strength of the encryption the server is willing to use.
That matters because the weak spots are invisible from a browser's padlock icon. A site can show a valid padlock while still accepting TLS 1.0, offering weak ciphers, or serving an incomplete chain that breaks on some devices — problems a checker surfaces before your users hit them.
An expired certificate throws a full-page browser warning that stops visitors cold and erodes trust instantly. A weak or outdated TLS configuration exposes traffic to downgrade and interception attacks. And certificate lifetimes are only getting shorter: in 2025 the CA/Browser Forum voted to cut the maximum TLS certificate lifetime to 47 days by 2029 (CA/Browser Forum ballot SC-081), which makes manual tracking impractical and monitoring essential.
Secably opens a real TLS connection to the host and inspects what the server presents, then grades the certificate and encryption configuration.
Reads the certificate's subject, issuer, and validity dates, verifies the chain up to a trusted root, and flags expiry, hostname mismatch, and self-signed certificates.
Determines which protocol versions the server accepts, from TLS 1.0 to TLS 1.3, and inspects the negotiated cipher suite for strength.
Highlights insecure settings — deprecated TLS 1.0/1.1, weak ciphers, and the outdated protocols behind downgrade-class attacks like POODLE and BEAST.
Type the hostname you want to check, like example.com. Secably connects over HTTPS automatically.
Secably completes a TLS handshake and reads the certificate, chain, supported versions, and cipher configuration.
See days-to-expiry, chain status, and any deprecated protocols or weak ciphers flagged. Save reports and set expiry alerts with a free account.