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Tools / WebSocket client & frame inspector

WebSocket client & frame inspector

Test ws:// and wss:// connections directly in your browser. Send formatted text or JSON messages, inspect bidirectional frames with latency and byte counters, and run auto-heartbeat pings.

Runs entirely in your browser

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About this tool

WebSockets provide a persistent, two-way connection between a browser and a server, used for chat, live dashboards, games and collaborative apps. This tester connects to ws:// or wss:// endpoints directly in your browser, lets you send formatted text or JSON messages, and inspects the frames flowing in both directions with latency and byte counters, plus optional heartbeat pings.

Debugging a WebSocket without a client of your own is difficult; this gives you an interactive one. You can confirm a connection opens, send test messages, watch the server’s responses frame by frame, and check that keep-alive pings behave — all without writing code.

It runs in your browser. Use it to verify a WebSocket server, debug the message format, test reconnection and heartbeats, or explore an unfamiliar real-time API.

Frequently asked questions

What can the WebSocket tester do?
Connect to ws:// or wss:// endpoints, send text or JSON messages, inspect incoming and outgoing frames with latency and byte counts, and run heartbeat pings.
What is the difference between ws:// and wss://?
wss:// is the encrypted (TLS) version of the WebSocket protocol, the secure equivalent of https. Use wss for production endpoints.
Why send heartbeat pings?
Periodic pings keep a connection alive through proxies and detect dropped connections. The tester can send them automatically so you can check that behaviour.
Is it done in the browser?
Yes. It connects and exchanges frames directly from your browser.

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