Connect to a WebSocket server to send and receive raw JSON messages.
Browser WebSocket Client is an extension for Chrome and Firefox that provides a simple method for testing a WebSocket server. It allows you to send and receive raw JSON messages as well as save server URLs, protocols, and messages for later use.
Advantages
Intuitive Bootstrap 4 user interface
Save server URLs, protocols, and messages for later use
Login to Chrome or Mozilla and your saved settings will be synced across different devices
Pretty-print incoming JSON messages and saved message bodies
Export and import the plugin settings so you can easily backup and share them with colleges