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By Kevin Whitley in Engineering1 min read

Itty Sockets: Zero-Config WebSockets.

Itty Sockets offers instant, serverless pub/sub over WebSockets with a 466-byte gzipped client and no accounts, API keys, or deployment required. Channels are private by name, messages are relayed without storage, and optional namespace reservations add access control.

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Itty Sockets: Zero-Config WebSockets.

Author: Kevin Whitley | Published: Unknown | Generated: 2026-03-14 | Domain: ittysockets.com Tags: ‘#websockets’ ‘#realtime’ ‘#pubsub’ ‘#javascript’ ‘#serverless’

TLDR

Itty Sockets is a zero-configuration WebSocket pub/sub service: import the client, choose a channel name, and send JSON-serializable messages to every connected participant. Its fully typed client is 466 bytes minified and gzipped, handles common WebSocket concerns such as race conditions and reconnection, and requires neither a backend nor user accounts. Messages are relayed rather than logged or stored; reserved namespaces provide optional join/send-key access controls.

Key Takeaways

  • Instant channel-based pub/sub: Clients connecting to the same channel receive one another’s messages, supporting strings, arrays, objects, and other JSON-serializable payloads.
  • No operational setup or cost: The service advertises no servers to deploy, accounts or API keys to create, pricing tiers, or credit-card requirement; its base offering is free forever.
  • Tiny client footprint: The itty-sockets package is listed at 466 bytes min+gzip, fully typed, with routing, race-condition handling, and one-line reconnection support.
  • Privacy model: Messages are relayed and forgotten, with no logging, tracking, or storage; applications needing stronger confidentiality can encrypt payloads before sending.
  • Optional access control: Reserved namespaces can restrict who joins or sends to channels through joinKey and sendKey credentials, managed from a dashboard.

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