WebSocket Playground

Connect to any WebSocket server, send and receive messages in real time. JSON auto-formatting, timestamps, message templates, binary support, and log export. No server upload.

Try:

Disconnected

Connect to a WebSocket server to start sending and receiving messages.

About this tool

A browser-based WebSocket client that connects to any ws:// or wss:// endpoint — useful for testing APIs, IoT device streams, chat servers, or any real-time service. All traffic stays between your browser and the target server; nothing passes through this site.

Features

JSON mode — auto-formats received messages; validates + pretty-prints outgoing JSON
Binary mode — send raw hex bytes (e.g. FF 01 02 03); binary frames shown as hex dump
Timestamps — every message line is timestamped to the millisecond
Templates — one-click boilerplate for common WebSocket message patterns
Log export — download the full session as a .txt file
Reconnect — automatically updates status if the server closes the connection

Tips

Use Ctrl+Enter to send without reaching for the mouse
Browsers block ws:// (plain, non-TLS) connections from HTTPS pages; use wss:// echo servers for quick tests
The URL hash updates each time you connect — bookmark it to restore the server URL