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Glossary Web & HTTP

HTTPS

HTTPS is HTTP sent over an encrypted TLS connection, which keeps traffic private and confirms the identity of the server.

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In more detail

The browser checks the server's Digital certificate and then encrypts everything with TLS, so people on the same Wi-Fi cannot read or change what you send. The padlock means the connection is secure, not that the site is trustworthy. HTTPS is also required for many browser features and is a minor search ranking signal.

Try these tools

SSL Certificate Checker

Check any domain's SSL/TLS certificate details server-side — issuer, subject, expiry date, and SAN list.

Security Headers Analyzer

Check a website's HTTP security headers (HSTS, Content-Security-Policy, X-Content-Type-Options, Referrer-Policy, Permissions-Policy.

See also

  • Glossary TLS
    TLS (Transport Layer Security) is the cryptographic protocol that encrypts and authenticates connections, including HTTPS, email and VPNs.
  • Glossary Digital certificate
    A digital certificate is a signed file that links a public key to an identity, such as a domain name, so others can trust that key.
  • Glossary HTTP
    HTTP (Hypertext Transfer Protocol) is the protocol browsers and servers use to request and send web pages, files and data.
  • Guide How HTTPS and TLS Work
    How the TLS 1.3 handshake, key exchange and certificate chain make a connection private and authenticated.
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