Cryptography & Transport

HTTP/2

HTTP/2 is the second major version of the HTTP network protocol, designed to improve web performance through multiplexing, header compression, and server push. Unlike HTTP/1.1, it allows multiple requests to be sent over a single TCP connection simultaneously, reducing latency. HTTP/2 requires HTTPS in practice, as all major browsers only support it over TLS. Enabling HTTP/2 typically requires no application changes and provides measurable performance improvements.

Why it matters for your website

  • 1Affects your HTTPS rating and SSL grade on security scanners
  • 2Required for PCI-DSS and SOC 2 compliance
  • 3Browsers block insecure connections and show warnings to users

Check your site for HTTP/2 issues

Run a free scan to see if your domain has any HTTP/2-related vulnerabilities or misconfigurations.

Related Terms

Browse Glossary

View all 85 terms

Free Security Scan

See your SSL, headers, CORS, DNS, and email security score in seconds.