we would like to test our secure websocket (i.e wss) end point. I am looking for easy tool to test the endpoint. is there browser plugin available for wss protocol?
3 Answers
I used "Simple WebSocket Client" chrome plugin to test wss endpoint. If your websocket is using self signed certificate, you to need add that certificate as a trusted certificated in your browser.
I followed below steps to add the self signed in my chrome browser.
suppose your websocket url is "wss://host1:port1/testSocket" . Then type urls as https:// host1:port1/testSocket and trust the certificate.

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2https://chrome.google.com/webstore/detail/simple-websocket-client/pfdhoblngboilpfeibdedpjgfnlcodoo – Nicholas Blasgen Oct 23 '16 at 03:21
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@NicholasBlasgen, thank you, but it didn't work with a server sharing an untrusted/invalid SSL certificate - threw an internal implicit code exception message. The following worked however: https://chrome.google.com/webstore/detail/hermes-websocket-client/heiclpadccjamigpdpfpbdkcfnglcjgc/related . In addition, you might find https://www.postman.com/ or similar standalone interesting, too. – Artfaith Jun 27 '23 at 16:24
AutobahnTestsuite is an automated WebSocket protocol test suite that supports WSS. It is used by most WebSocket implementors to test their implementations for compliance and interoperability.
The project and third-party Web Application Messaging Protocol (WAMP) clients are also available at: https://crossbar.io/autobahn
Disclosure: I am original author of the testsuite.
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It does show 404 at this moment. We hope you are safe out there... Please do stay! – Artfaith Jun 27 '23 at 16:26
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1above link is dead and won't come back, but you may find the OSS project here https://github.com/crossbario/autobahn-testsuite – oberstet Jul 01 '23 at 00:11
I've run into this issue often enough that I finally created my own barebones GUI for testing websockets. It's called Socket Wrench, it supports
- multiple concurrent connections to servers (with all responses and connections displayed in the same view),
- comprehensive message history to enable easy re-use of messages, and
- custom headers for the initial connection request.
It's available for Mac OS X, Windows and Linux and you can get it from here.

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