libwebsockets

{
  "aliases": [],
  "alternatives": [
    "libcurl",
    "nghttp2",
    "OpenSSL"
  ],
  "build_dependencies": [
    "cmake"
  ],
  "categories": [
    "library",
    "networking",
    "web-server"
  ],
  "caveats": null,
  "conflicts_with": [],
  "dependencies": [
    "libevent",
    "libuv",
    "openssl@3"
  ],
  "deprecated": 0,
  "deprecation_reason": null,
  "desc": "C websockets server library",
  "disable_reason": null,
  "disabled": 0,
  "enrichment_fetched_at": "2026-06-20T23:41:12+00:00",
  "first_seen": "2026-06-20T23:34:18+00:00",
  "full_name": "libwebsockets",
  "github_default_branch": "main",
  "github_last_commit_at": "2026-06-20T18:24:38Z",
  "github_readme_excerpt": "[![CI status](https://libwebsockets.org/sai/status/libwebsockets)](https://libwebsockets.org/git/libwebsockets) [![Coverity Scan Build Status](https://scan.coverity.com/projects/3576/badge.svg)](https://scan.coverity.com/projects/3576) [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/2266/badge)](https://bestpractices.coreinfrastructure.org/projects/2266) \n\n# Libwebsockets\n\n** NEW features available on main **\n\n - Support for SChannel (windows native TLS, no need for OpenSSL build!), GnuTLS, and BearSSL added\n - QUIC + H3 + Webtranspoer implementation, using aws-lc, wolfssl, boringssl, libressl, gnutls, and schannel (OpenSSL is h1/h2 -only, mbedtls can do it via a patch)\n\n|LWS version|Platform|Protocols|Default TLS|\n|---|---|---|---|\n|\u003c= 4.5|non-FreeRTOS|any|OpenSSL|\n|\u003c= 4.5|FreeRTOS|any|mbedTLS|\n|5.0+|Windows|any|schannel|\n|5.0+|*nix|h1, h2|OpenSSL|\n|5.0+|*nix|quic/h3|GnuTLS|\n|5.0+|FreeRTOS|any|mbedTLS|\n\nquic/h3 is enabled for build by default... necessitating GnuTLS instead of OpenSSL to make quic/h3 work.\n\n\n| TLS Library | Server TLS | Client TLS | QUIC Transport (TLS 1.3) | WSS / HTTPS | MQTT over TLS | ALPN (HTTP/2) | DTLS (WebRTC) | Session Cache | JIT Trust | GenCrypto |\n| :--- | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: |\n| **GnuTLS**    | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **No** | **Yes** |\n| **OpenSSL**   | **Yes** | **Yes** | **No*** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |\n| **LibreSSL**  | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **No** | **Yes** |\n| **AWS-LC**    | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **No** | **Yes** |\n| **BoringSSL** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **No** | **Yes** |\n| **wolfSSL**   | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **",
  "github_repo": "warmcat/libwebsockets",
  "github_stars": 5299,
  "github_topics": [
    "c",
    "c-library",
    "client-server",
    "embeddable",
    "freertos",
    "http2",
    "libev",
    "libevent",
    "libuv",
    "libwebsockets",
    "lightweight",
    "lws",
    "portable-library",
    "sshd",
    "websockets"
  ],
  "homepage": "https://github.com/warmcat/libwebsockets",
  "homepage_og_description": null,
  "homepage_og_image": null,
  "homepage_title": null,
  "installs_30d": 2220,
  "installs_365d": 29784,
  "installs_90d": 8392,
  "keg_only": 0,
  "keg_only_reason": null,
  "last_seen": "2026-06-20T23:34:18+00:00",
  "license": "MIT",
  "llm_generated_at": "2026-06-20T23:47:55+00:00",
  "llm_model": "claude-haiku-4-5",
  "name": "libwebsockets",
  "oldnames": [],
  "one_liner": "C library for WebSocket servers and clients with HTTP/2, QUIC, and TLS support.",
  "optional_dependencies": [],
  "rank_30d": 929,
  "rank_365d": 885,
  "rank_90d": 884,
  "raw_hash": "c09322e349310959",
  "recommended_dependencies": [],
  "revision": 0,
  "ruby_source_path": "Formula/lib/libwebsockets.rb",
  "tap": "homebrew/core",
  "test_dependencies": [],
  "uses_from_macos": [],
  "version_head": "HEAD",
  "version_stable": "4.5.8",
  "versioned_formulae": [],
  "why_use_this": "Embed WebSocket and HTTP functionality into C/C++ applications with minimal overhead. Supports multiple TLS backends (OpenSSL, GnuTLS, mbed TLS), event loop integration (libevent, libuv), and modern protocols like HTTP/2 and QUIC. Lightweight and portable across embedded, desktop, and server platforms."
}