websockets/ws

Health v2 · maintenance only

Adoption not part of the score

22793 stars · 2578 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

ws is a fast, thoroughly tested WebSocket client and server library for Node.js implementing RFC 6455. It passes the extensive Autobahn test suite and supports features like permessage-deflate compression and optional native performance addons.

Use cases

• build a websocket server in node.js
• connect to a websocket server from node.js backend
• implement real-time push messaging over websockets
• broadcast messages to connected websocket clients
• add websocket support to an existing http server
• send and receive binary data over websockets
• enable websocket compression for faster payloads

When to choose

• you need a battle-tested, RFC 6455 compliant WebSocket implementation for Node.js
• you want a lightweight library without heavy framework dependencies
• you need to share an HTTP/S server between web and WebSocket traffic
• performance matters and you can use optional native addons like bufferutil

When to avoid

• your code runs in the browser - use the native WebSocket API instead
• you need a full real-time framework with rooms, reconnection, and fallbacks (e.g. Socket.IO)
• you are not using Node.js or a Node-compatible runtime

Facets

library · maturity stable

websocket http-server middleware web-development backend networking developer-tools cross-platform rfc-6455 websocket-client websocket-server websocket-compression real-time autobahn-tested nodejs

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markdown · JSON · MCP: product_card(name="websockets/ws")