WebSocket & SSE Client Tester
Processed in your browser
Test WebSockets (WS/WSS) and Server-Sent Events (SSE) directly in your browser with real-time log inspector, message sender, and telemetry.
Status:
Disconnected
00:00:00
Sent: 0 (0 B)
Received: 0 (0 B)
Message Dispatcher
Connect to a WebSocket or SSE endpoint to begin stream inspection.
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Direct In-Browser Handoff
API Testing & HTTP Diagnostics Suite
Chain this tool with complementary private browser utilities for a complete zero-server workflow:
Helpful Examples
Public Echo WebSocket
Connect to a public WebSocket echo endpoint to test round-trip messaging.
wss://echo.websocket.events
Local Dev Server
Connect to your local backend socket during development.
ws://localhost:8080/wsHow to Use the WebSocket & SSE Client Tester
Debug and inspect WebSocket streams and Server-Sent Events endpoints client-side. Connect to ws/wss or http/https event sources, dispatch JSON/text frames, view raw message streams with timestamps, and monitor connection metrics without installing desktop software.
Privacy & Data Processing Notice
No user data leaves your browser. Computation is executed entirely on your device. We do not store, view, or transmit your inputs over our network. Your computation remains on your personal machine.
Frequently Asked Questions
How does this client connect to WebSockets and SSE streams?
Connections are initiated directly from your browser engine using standard native WebSocket and EventSource APIs. No intermediate proxy or server-side relay is involved.
Does it support secure WebSocket (wss://) connections?
Yes! Both ws:// and wss:// secure sockets are supported. Note that modern browsers may require wss:// when loading from HTTPS origins to prevent mixed-content restrictions.
Are private payloads or tokens logged or uploaded anywhere?
No. Under our strict P0 privacy standard, all messages, authentication tokens, and stream payloads remain exclusively within your browser runtime memory.
Can I test local development endpoints like ws://localhost:8080?
Yes! You can connect to localhost, local Docker containers, or LAN IP addresses directly from your machine.
Related Utilities
Frequently paired browser tools in Developer Tools