Compare software

WebSocket Kingwebsocat
Free

Free to use in the browser.

 Free

Free and open source.

Web Command line
  • Nothing to install
  • Focused on WebSocket testing and debugging
  • Quick interactive testing of WebSocket endpoints
  • Works in pipes and shell scripts
  • WebSockets only, not a general HTTP client
  • Little public documentation about its features
  • Command line only
  • Advanced options take time to learn
Web application Downloadable app
Closed source Open source
License not stated License not stated
Not stated if an account is needed No account needed
Not stated if it works offline Not stated if it works offline

Checked September 24, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.