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Fiddler VS Tests.ws

Compare Fiddler VS Tests.ws and see what are their differences

Flagsmith
Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source. featured
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Fiddler logo Fiddler

Fiddler is a debugging program for websites.

Tests.ws logo Tests.ws

WebSocket Proxy is a browser based extension for testing and debugging. Monitor, inspect, and modify WebSocket traffic in real-time.
  • Fiddler Landing page
    Landing page //
    2023-09-19
  • Tests.ws Landing page
    Landing page //
    2025-03-30
  • Tests.ws Find websocket proxy tab in devtools
    Find websocket proxy tab in devtools //
    2025-04-14
  • Tests.ws Monitor messages and data
    Monitor messages and data //
    2025-04-14
  • Tests.ws Use javascript to modify data on a fly
    Use javascript to modify data on a fly //
    2025-04-14

WebSocket Proxy is a powerful browser extension for testing and debugging WebSocket connections. It lets you monitor, inspect, and modify WebSocket traffic in real time - right from your browser. Ideal for developers, QA engineers, and anyone working with WebSocket APIs.

Fiddler

Website
telerik.com
$ Details
-
Platforms
-
Release Date
-
Edit details

Tests.ws

Website
tests.ws
$ Details
free
Platforms
Google Chrome
Release Date
2025 February
Edit details

Fiddler features and specs

  • Comprehensive Debugging
    Fiddler allows for detailed HTTP/HTTPS traffic inspection and debugging, making it invaluable for diagnosing and troubleshooting web applications.
  • Cross-Platform Compatibility
    Works on Windows, macOS, and Linux, providing flexibility to developers working in different environments.
  • Custom Scripting
    Supports custom scripts using FiddlerScript, enabling advanced functionalities and automation of repetitive tasks.
  • User-Friendly Interface
    Provides an intuitive and easy-to-use interface that helps users navigate and utilize its features effectively.
  • Web Debugging Proxy
    Acts as a proxy server that captures traffic between your computer and the internet, which is essential for debugging web applications.

Possible disadvantages of Fiddler

  • Learning Curve
    May require a period of learning and adaptation for users new to the tool or those who are not familiar with HTTP/HTTPS concepts.
  • Resource Intensive
    Can be resource-heavy, especially when capturing and storing large amounts of traffic data, which may slow down your computer.
  • Limited Mobile Support
    Although it can work with mobile devices, setup can be cumbersome and less straightforward compared to desktop debugging.
  • Documentation and Community
    While there is good documentation available, it may not cover all niche use cases, and community support can be hit or miss.
  • SSL Decryption
    Decrypting HTTPS traffic requires additional setup and can introduce security risks if not handled properly.

Tests.ws features and specs

  • Real-time traffic monitoring
    View live WebSocket messages as they are sent and received.
  • Message editing
    Modify WebSocket messages directly in the UI and resend them using injected JavaScript. Perfect for testing custom scenarios, error handling, or backend responses.

Fiddler videos

+ Add

Fiddler On The Roof, Faith on Film review

More videos:

  • Review - FIDDLER ON THE ROOF WEST END REVIEW | Georgie Ashford
  • Review - Fiddler on the Roof Review

Tests.ws videos

No Tests.ws videos yet. You could help us improve this page by suggesting one.

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Category Popularity

0-100% (relative to Fiddler and Tests.ws)

Fiddler

Tests.ws

Developer Tools
92 92%
Developer Tools
8% 8
Security
100 100%
Security
0% 0
Testing
0 0%
Testing
100% 100
Monitoring Tools
100 100%
Monitoring Tools
0% 0

Questions and Answers

As answered by people managing Fiddler and Tests.ws.

What makes your product unique?

Tests.ws's answer:

Websocket Proxy provides browser-native tools specifically tailored for modern WebSocket workflows. Unlike traditional debugging tools, it integrates directly into the browser, offering real-time insights and control over WebSocket traffic with zero setup. It's lightweight, developer-focused, and designed to feel like a natural extension of your dev tools.

Why should a person choose your product over its competitors?

Tests.ws's answer:

Because WebSockets Proxy is purpose-built for WebSocket debugging. While most dev tools treat WebSockets as a side feature, we put it front and center. With a clean UI, message editing/resending via JavaScript, and upcoming features like a built-in client, it's the most focused and intuitive tool for real-time app developers.

How would you describe your primary audience?

Tests.ws's answer:

Developers, QA engineers, and tech teams who work with real-time web apps using WebSocket connections. Especially useful for those building chat apps, live dashboards, games, or collaborative tools.

What's the story behind your product?

Tests.ws's answer:

Websocket Proxy was born out of frustration with clunky, generic network tools that barely support WebSockets. Honestly, I was just too lazy to set up Burp Suite for quick checks. I needed something simple, fast, and browser-native, so I built it. What started as a side project to speed up internal debugging turned into a tool I realized others needed too.

Which are the primary technologies used for building your product?

Tests.ws's answer:

JavaScript / TypeScript, WebExtension APIs, Chrome DevTools Protocol, Vite for bundling, TailwindCSS (for UI), WebSocket protocol (obviously 🙂)

Who are some of the biggest customers of your product?

Tests.ws's answer:

While we're still early in our journey, Websocket Proxy already has 77 users in just the first couple of months. Many of them are developers from early-stage startups, QA engineers, and real-time app builders. One of them even reached out with a feature request - which is now in development. We're building based on real feedback from real users.

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Fiddler and Tests.ws

Fiddler Reviews

Top 10 HTTP Client and Web Debugging Proxy Tools (2023)
Next right up is Fiddler. It is one of the most powerful and popular web debugging proxy tools. it can debug and troubleshoot endlessly. What you would come to like is that Fiddler is free and has lots of plug-ins you can use. Knowing it captures, analyze and record HTTP traffic between your device and the server, handling any embedded issues becomes easy.
Source: www.bestproxyreviews.com
12 HTTP Client and Web Debugging Proxy Tools
Fiddler is a cross-platform web debugging proxy. It can help manipulate web sessions, inspect HTTPS traffic, and monitor traffic between your computer and the Internet.
Source: geekflare.com
Comparing Charles Proxy, Fiddler, Wireshark, and Requestly
Fiddler is another popular web debugging proxy that runs on Windows. It provides developers with a range of features, such as HTTP/HTTPS traffic capturing, request modification, and performance testing. In addition to these features, Fiddler has a scripting engine called FiddlerScript, which allows for customizing the tool’s behavior. This scripting engine enables developers...
Source: dev.to
73 Best SEO tools 2021 – The Most Epic List You Shouldn’t Miss
The answer is simple – if you are looking for an SEO site tool that won’t freeze your browser (a common problem with most plugins), then Fiddler is your ultimate debugging tool.
Source: blog.linkody.com

Tests.ws Reviews

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What are some alternatives?

When comparing Fiddler and Tests.ws, you can also consider the following products

Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy

Warp - Warp (Windows Advanced Rasterization Platform) is a high-speed software rasterizer tool designed for the accurate reproduction of bitmap graphics on modern microprocessor-based systems.

Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.

Burp Suite - Burp Suite is an integrated platform for performing security testing of web applications.

Postman - The Collaboration Platform for API Development

Zed Attack Proxy - The Zed Attack Proxy (ZAP) is an easy to use integrated penetration testing tool for finding...

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