Fiddler Web Debugger

Download Fiddler, a free web debugging proxy tool for inspecting and manipulating HTTP/HTTPS traffic across multiple platforms.

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6,076+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

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About This Tool

Fiddler is a powerful web debugging proxy tool that allows developers and testers to inspect, debug, and manipulate HTTP/HTTPS traffic between their computer and the internet. This tool provides a free download for Windows, macOS, and Linux systems, enabling real-time traffic monitoring, request/response inspection, performance testing, and security analysis. With Fiddler, you can debug web applications, test APIs, simulate network conditions, and analyze traffic patterns to optimize your web projects.

Save your calculation history with a free account

How to Use

Select your operating system (Windows, macOS, or Linux) from the options.
Choose your preferred download method (direct download or alternative mirror).
Click the 'Download Fiddler' button to start the download.
Once downloaded, run the installer and follow the on-screen instructions.
Launch Fiddler and configure your browser or system to use the proxy for debugging.

Frequently Asked Questions

Find Quick Answers

Is Fiddler completely free to download and use?

Yes, Fiddler is free to download and use for personal and commercial purposes. There are no subscription fees or hidden costs.

What are the system requirements for Fiddler?

Fiddler requires Windows 7 or later, macOS 10.12 or later, or Linux with .NET Core 3.1 or later. At least 2GB RAM and 200MB disk space are recommended.

Can I use Fiddler to debug HTTPS traffic?

Yes, Fiddler can decrypt and inspect HTTPS traffic by installing a trusted root certificate on your system, allowing you to see encrypted content for debugging purposes.

Does Fiddler work on mobile devices?

Fiddler primarily runs on desktop operating systems, but you can configure mobile devices to route traffic through Fiddler running on your computer for debugging mobile apps and websites.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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