hyperium/h2

Health v2 · maintenance only

Adoption not part of the score

1544 stars · 374 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

H2 is a Tokio-based HTTP/2 client and server implementation for Rust that implements the full HTTP/2 specification. It serves as the low-level protocol layer used by the hyper HTTP library, leaving connection management, TLS, and HTTP/1 upgrades to higher-level crates.

Use cases

• implement http/2 protocol in rust
• build an http/2 server on tokio
• make http/2 client requests in rust
• low-level http/2 framing and streams
• embed http/2 support in a custom http library
• conformance-test compliant http/2 implementation

When to choose

• you need direct, spec-complete control over HTTP/2 in a Tokio application
• you are building an HTTP library or framework on top of HTTP/2
• you need a well-tested implementation that passes h2spec

When to avoid

• you want a full-featured HTTP client/server with TLS and connection pooling - use hyper instead
• you need HTTP/1.x support or upgrade handling
• you are not using the Tokio async runtime

Facets

library · maturity stable

http-server http-client concurrency web-development backend networking developer-tools rust cross-platform http2 tokio async protocol-implementation

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