Security check
HTTP/2
Records which protocol the server agreed to during the TLS handshake (ALPN).
- Category
- Security
- Importance
- Low importance
- Check id
- http2
How the result is decided
- PassHTTP/2 (h2).
- WarningOnly HTTP/1.1.
- InfoThe page isn’t on HTTPS (HTTP/2 needs it), or the protocol couldn’t be determined.
“Info” results don’t count toward the score.
Why it matters
HTTP/2 loads many files over one connection, which usually makes pages with many assets faster.
How to fix it
Turn on HTTP/2 in your web server (for example listen 443 ssl http2; on older Nginx versions, or http2 on; on newer ones) or put the site behind a CDN, which supports it by default.
After the fix, open the page’s report and choose Run again to confirm it passes.