TLS is the modern protocol used to secure HTTPS traffic. A TLS check helps confirm whether a site has working encryption and whether certificate handling is set up properly.
TLS secures data exchanged between a browser and a website. It protects logins, forms, payments, and other sensitive interactions.
Use a TLS check during security reviews, after moving hosting, after certificate changes, or when users report warnings or connection issues.
Review whether the certificate is valid, whether the hostname matches, and whether the domain is serving encrypted traffic correctly.
Common issues include expired certificates, hostname mismatch, incomplete intermediate chains, and incorrect server-side certificate deployment.
Once you understand what to look for, run a live check using the tool below.
Launch SSL CheckerTLS is the protocol used to secure data in transit and is the modern successor to SSL.
SSL is still commonly used as a general term even though most modern secure sites actually use TLS.
This page explains the purpose of the check, what results mean, and what problems to watch for before you run the live tool.
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