WebSocket Tester
Connect to WebSocket and SSE endpoints, send messages, and inspect frames in real time.
About WebSocket Tester
Test WebSocket and Server-Sent Events (SSE) endpoints directly in your browser — no install required. Connect, send messages, and inspect every frame in real time. Supports subprotocols, auto-ping, and JSON pretty-printing.
WebSocket Tester
WebSocket Tester is a free, client-side tool designed to help developers with connect to websocket and sse endpoints, send messages, and inspect frames in real time..
How to Use
- Input your data into the primary editor or upload a file.
- Adjust any necessary configuration options.
- View the output in real-time or click the action button to process.
- Copy or download the results securely.
Privacy First
All processing happens directly in your browser. We never send your sensitive data to our servers.
Frequently asked
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