GF.dev HTTP/2 Compatibility Check

A free web tool that checks whether a server negotiates HTTP/2 via ALPN.

FreeProprietaryWeb

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About GF.dev HTTP/2 Compatibility Check

The HTTP/2 Compatibility Check is one of the GF.dev Geek Tools. It connects to your server and checks whether it successfully negotiates the h2 protocol through ALPN during the TLS handshake.

Because browsers only use HTTP/2 over HTTPS, the check applies to encrypted sites. A short FAQ explains the benefits of multiplexing, and the page links to a guide on enabling HTTP/2 and HTTP/3. It suits a quick confirmation after configuring a web server or CDN.

Strengths

  • Tests real ALPN negotiation rather than headers
  • Nothing to install
  • Linked guide on enabling HTTP/2

Limitations

  • Single-purpose check with a simple result
  • Only checks servers reachable from the internet

Details

Pricing
FreeFree to use in the browser.
License
Proprietary
Developer
GF.dev
Platforms
Web
How it runs
Web application
Works offline
No
Best suited for
Confirming a web server supports HTTP/2
Categories
Website testing
Last verified
Added
Provenance
Selected from the TechWalrus Resource Hub (Website Checkers & Audit Tools); facts checked against the developer's own pages, 2 sources on file.

Report a wrong fact or a dead link on this listing