🔌 WebSocket Online Tester

HTML5 WebSocket-based online debugging tool, supports internal and external connection testing

Connection format: ws://IP-or-domain:port or wss://IP-or-domain:port Example: ws://127.0.0.1:8080

🌍 Used by 50,000+ users ⭐ 4.9/5 rating 🔒 100% Private 🚫 No Ads, No Signup

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100% Free & Private

No ads, no signup, no watermark. Everything runs locally in your browser. Your data never leaves your device.

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Messaging

Supports sending text and JSON format messages, real-time display of server responses

📜

Connection History

Automatically saves connection records for convenient repeated testing of the same WebSocket address

{ }

Message Formatting

Automatically detects and formats JSON messages for clearer and more readable debugging data

🔗 Connection Settings

Disconnected

ws://

WS WSS (SSL)

Sent

Received

Errors

--:--

Duration

📤 Send Message

Text JSON

Quick Messages

ping pong hello {ping} {subscribe}

📋 Message Log

📭

No messages yet

Messages will appear here after connecting to WebSocket

📖 Usage Guide

Supports ws:// (regular) and wss:// (SSL encrypted) protocols
Internal test: ws://192.168.1.100:8080 or ws://localhost:3000
External test: wss://example.com/ws or ws://your-domain.com:8080
Supports sending plain text and JSON format messages, with automatic JSON formatting
Real-time display of sent/received messages with timestamps and content
Real-time connection status monitoring, statistics for sent/received/error counts

❓ FAQ

What is WebSocket?

WebSocket is a full-duplex communication protocol that enables the server to push data to the client proactively. Unlike traditional HTTP request-response mode, WebSocket can communicate bidirectionally in real-time after establishing a connection, suitable for chat, real-time data push, online games, etc.

What is the difference between ws and wss?

ws is the regular WebSocket protocol, wss is the encrypted WebSocket (similar to the relationship between http and https). wss uses TLS/SSL to encrypt data transmission, which is more secure. It is recommended to use wss protocol in production environments.

Why does WebSocket connection fail?

Common reasons include: incorrect address, server not started, firewall blocking, CORS restrictions, SSL certificate issues (wss protocol), port occupied, etc. It is recommended to check the server status and network connection to ensure the WebSocket service is running normally.

Can I test WebSocket that requires authentication?

This tool does not support WebSocket connections that require authentication. It only supports non-authenticated WebSocket connection testing. For authenticated connections, it is recommended to use professional WebSocket client tools like Postman or wscat.

Are there any message format restrictions?

Any text message is supported, JSON format will be automatically formatted for display. The tool automatically detects JSON format and beautifies it for easy API interface debugging. There is no specific message length limit, but it is recommended to keep single messages under 64KB.

Is this tool really free with no ads?

Yes, 100% free with no ads, no registration, no watermark, and no usage limits. All processing happens locally in your browser — your data is never uploaded to any server.

100% Free & Private

Messaging

Connection History

Message Formatting

🔗 Connection Settings

📤 Send Message

Quick Messages

📋 Message Log

📖 Usage Guide

❓ FAQ

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