🔌 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

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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://
0
Sent
0
Received
0
Errors
--:--
Duration

📤 Send Message

Quick Messages

ping pong hello {ping} {subscribe}

📋 Message Log

📭

No messages yet

Messages will appear here after connecting to WebSocket

📖 Usage Guide

❓ 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.

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About WebSocket Client & Tester

Welcome to the WebSocket Client & Tester, a powerful and 100% free browser-based utility engineered to deliver fast, reliable, and private solutions for websocket tester online free. Whether you are a web developer, digital marketer, student, or business professional, this tool streamlines complex workflows into simple, automated actions without requiring software downloads or account registrations. With full client-side processing, you can work with confidence knowing that your sensitive data, files, and inputs are processed locally in your device memory and never leave your computer.

Optimized for high-volume productivity, our test websocket connection ws wss provides real-time validation, responsive visual feedback, and cross-platform compatibility across desktop, tablet, and mobile devices. Explore the complete functionality of online websocket client browser to speed up daily tasks, eliminate manual human error, and achieve pixel-perfect results in seconds. Built by senior SEO and web strategist TechErics Tools, this tool is part of our suite of 170+ free utilities designed to empower creators and businesses worldwide.

Technical Specifications & RFC Standards

Industry specifications and protocol standards compliant with this tool:

Standard / Specification Protocol Details Compatibility
Data SerializationRFC 8259 / ECMA-404 JSON StandardUniversal API & database support
Character EncodingUnicode UTF-8 / UTF-16 Multi-byteEmojis, multilingual strings & symbols
Execution EngineV8 / SpiderMonkey Client JavaScriptZero latency local runtime execution
Output FormattingConfigurable 2-Space, 4-Space, or Tab IndentationPrettier & ESLint compliant output

How to Use This Tool in 4 Simple Steps

  1. 1Enter your WebSocket URL (e.g. `wss://echo.websocket.events`).
  2. 2Click Connect to establish the live socket connection.
  3. 3Type your payload and click Send to inspect live messages.
  4. 4Copy, download, or share your final output with one-click clipboard integration.

Key Features & Security Highlights

⚡
Instant Processing

Executes locally in your web browser with zero server lag.

🛡️
100% Private & Secure

Your inputs and files never leave your computer or device.

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Unlimited Free Use

No paywalls, no credits, no daily quotas, and no registration.

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Cross-Device Ready

Works smoothly across desktop, tablet, and mobile browsers.

Frequently Asked Questions

Does the tester support secure WSS (TLS) connections?

Yes, both `wss://` (secure) and `ws://` (unencrypted) protocols are supported.

Can I use WebSocket Client & Tester for free commercial and business projects?

Yes, WebSocket Client & Tester is 100% free for both personal and commercial use with zero attribution requirements, licensing fees, or hidden paywalls.

Does WebSocket Client & Tester store or log my sensitive input data?

No. All computational logic executes locally within your browser sandbox. No input strings, files, or parameters are ever uploaded or transmitted across any third-party servers.

What browsers and operating systems support WebSocket Client & Tester?

The tool is compatible with all modern web browsers including Google Chrome, Apple Safari, Mozilla Firefox, Microsoft Edge, and works on Windows, macOS, Linux, Android, and iOS.