What is the difference between ws and wss?
wss uses TLS encryption. Production should use wss, consistent with HTTPS sites.
WebSocket Tester
DevTools WebSocket Tester connects to ws/wss endpoints, sends and receives text or binary messages, and shows connection status—ideal for chat, push, and realtime API debugging.
WebSocket Tester
Connect to WebSocket endpoints, send and receive messages, and inspect real-time traffic.
Status: Disconnected
No logs yet
About this tool
Validate handshakes, heartbeats, and message formats when building realtime features. Connection state and a message timeline help trace traffic.
How to use
- Enter a WebSocket URL (ws:// or wss://).
- Click Connect.
- Send messages and inspect replies.
FAQ
Why might connection fail?
Invalid certificates, proxies, servers not upgrading the protocol, or firewalls blocking WebSocket ports.
Does the tester store messages?
Messages stay in the current browser session for debugging—they are not uploaded to DevTools servers.
Is this tool free?
Yes. No sign-up required.
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