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WebSocket Tester

DevNeeds internet · User-entered WS/WSS endpoint

WebSocket Tester connects to any WebSocket endpoint (ws:// or wss://) directly from your browser, letting you send text and binary messages, watch incoming frames in real time, and inspect connection events. Export the complete session log for debugging or documentation. Useful for testing WebSocket APIs, chat servers, and real-time data services. Runs in your browser.

Related: cURL FormatterURLWebhook

Connection

Try:
idle↑ 0 sent · ↓ 0 received

Send a message

0 bytes · ⌘+Enter to send

Frames (0)

No frames yet. Connect and send a message.

WebSocket connections are made directly from your browser to the target server. Some servers reject browser origins (CORS-like behaviour) — if you see an immediate close with code 1006, that's usually why.

What WebSocket Tester does

WebSocket Tester Open a WebSocket to any ws:// or wss:// endpoint, send messages, watch frames in real time, export the session log. It lives in DevBench's Dev collection — open it in any modern browser with JavaScript enabled. There is no install step and no account wall: you get the UI immediately so you can paste input, tweak options, and copy output during real debugging sessions.

Like the rest of DevBench, this workflow runs entirely in your browser by default. Your text and files are processed with client-side JavaScript, which means they are not sent to our servers for routine formatting or conversion — open DevTools → Network and you should see no upload when you use the core controls. That makes these tools practical for internal payloads, configs, and drafts when you want to avoid unnecessary cloud round-trips.

Start from the controls above: paste or type into the labelled fields, upload when the tool supports files, and watch results update as you work. If output looks unexpected, verify encoding (UTF-8), line endings, and whether the tool expects structured input such as JSON, YAML, CSV, or hex. Many utilities include copy buttons or downloadable results so you can drop answers straight back into tickets, CI logs, or documentation.

When to use it

If you need deterministic automation at scale, shell scripts and CI pipelines still win — use DevBench to prototype the transform and validate edge cases, then port the same logic into your stack when you are happy with the behaviour.