Fiddler

desktop Free

www.telerik.com

🇺🇸 United States

Quick Facts

Open Source

Yes

Platforms

windowsmaclinux

API Available

limited

Account

Required

Skill Level

intermediate

Offline Capable

Yes

Output Formats

jsonxmltxthtml

What it does

Web debugging proxy by Progress/Telerik for capturing and analyzing HTTP/HTTPS traffic. Fiddler Everywhere (current) supports Windows, macOS, Linux with advanced filtering, traffic modification, and SOC 2 certification. Fiddler Classic (legacy) for Windows only. FiddlerCore library available for .NET integration. Used by NASA, Microsoft, Samsung, and IBM.

Video Tutorial

When to use it

Cross-platform HTTP debugging
.NET application integration (FiddlerCore)
Enterprise environments needing SOC 2
When familiar with Fiddler ecosystem

When not to use it

Security penetration testing
When you need completely free tool
macOS-first workflows (consider Proxyman)

Limitations

Fiddler Everywhere requires license for full features
Classic version Windows-only and legacy
Less security-focused than Burp

Frequently Asked Questions

Is Fiddler free to use?

Yes, Fiddler is completely free to use with no subscription required.

What platforms does Fiddler support?

Fiddler is available on Windows, macOS, Linux.

Does Fiddler require an account?

Yes, Fiddler requires an account to use.

Is Fiddler open source?

Yes, Fiddler is open source.

What are the limitations of Fiddler?

Fiddler Everywhere requires license for full features Classic version Windows-only and legacy Less security-focused than Burp

What does Fiddler do?

Fiddler is a desktop tool for http traffic interception. Web debugging proxy by Progress/Telerik for capturing and analyzing HTTP/HTTPS traffic. Fiddler Everywhere (current) supports Windows, macOS, Linux with advanced filtering, traffic modification, and S

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