WebSocket Tester
Test WebSocket connections in-browser.
🔌WebSocket Tester
All processing happens locallyWhat this tool does
WebSocket Tester is a WebSocket Tester with live preview and copy-ready CSS output., everything is generated inside your browser, so you can copy the CSS straight into your project.
Change any value and both the code and the preview update instantly.
How to use it
- Paste or type your content into the input field at the top, or press the sample button to load demo data.
- Adjust the options below the input, such as output format, separators, letter case or precision.
- Press the main button to run the conversion. Results appear instantly in the output panel without a page reload.
- When the result looks right, use the copy button in the corner, or download it as a local file.
Tips and notes
Clean up stray spaces and line breaks before pasting for more accurate results.
FAQ
The browser refuses invalid or self-signed certificates, and the server may reject the Origin header.
Yes, but if this site is served over https the browser blocks ws:// as mixed content. Open the tool over http or file:// for local debugging.
Milliseconds from clicking send to the first reply, i.e. one round trip; it does not separate server-side processing time.
Yes. The tool is completely free with no usage limits, and you never need an account or a sign-in.
No. All processing runs locally in your browser, so the input never reaches a server and is never logged or stored.
Yes. The layout is mobile-first, so inputs and buttons stay comfortable on phones and tablets in both orientations.
Yes. A copy button in the output panel puts the result on your clipboard, and you can also download it as a text file.