Test WebSocket and Socket.IO connections with a lightweight client. Send messages, view history, and save frequently used requests.
Users
3,000
0 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
2
0 in 30 days
Store rank
#18K
#16K among extensions
Version
0.0.3
updated 22 Jul 2026
Users
monthly, 2 years
Latest, 15 Oct 2026:3,000 usersMove the mouse over the chart for any month
Ratings count
monthly, 2 years
Latest, 15 Oct 2026:2 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About WebSocket & Socket.IO Client
## Features
v0.0.3 Release for Socket.IO support.
- 🔌 Easy WebSocket Connection Management
- Quick connect/disconnect with WebSocket endpoints
- Connection status monitoring
- Detailed connection state logging
- 🔌 Support Socket.IO Connection
- Quick connect/disconnect with Socket.IO endpoints
- Support for both event subscription
- Support event and message
- 📝 Advanced Message Handling
- Support for both text and binary messages
- Built-in JSON formatting and validation
- Message history with timestamp and direction
- Save frequently used messages for quick access
- 💾 Persistent Storage
- Auto-save connection history
- Save favorite messages for reuse
- Quick access to recent connections
- 🎨 Modern User Interface
- Clean and intuitive design
- Real-time message updates
- Compact message display
- Dark/Light theme support
## Perfect for
- Web developers testing WebSocket APIs
- Backend developers debugging WebSocket services
- QA engineers validating WebSocket implementations
- Anyone working with WebSocket-based applications
## How to Use
1. Enter your WebSocket URL (e.g., ws://localhost:8080)
2. Click "Connect" to establish connection
3. Send text or binary messages
4. View real-time responses
5. Save frequently used messages for quick access
6. Monitor connection status and history
## Technical Details
- Built with React and TypeScript
- Uses native WebSocket API
- Supports all modern browsers
- Zero external dependencies for core functionality
- Secure local storage for saved data
Perfect for developers who need a reliable, feature-rich WebSocket testing tool right in their browser.
## Test Server
- Web Socket: wss://ws.postman-echo.com/raw
- Socket.IO https://ws.postman-echo.com/socketio