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Fiddler (software)

From Wikipedia, the free encyclopedia
Fiddler
Original authorEric Lawrence
Stable release
6.0.20261 / 2.6.2.3 / 26 June 2026; 2 months ago (2026-06-26)[1]
LicenseFreeware / Shareware[1]
Websitewww.fiddler2.com/docs
Repositorygithub.com/telerik/fiddler-docs

Fiddler is a web debugging proxy and tool that logs all HTTP and HTTPS traffic between your device and the internet.[2] It is created by Eric Lawrence in 2003 as a separate project when he was still working in Microsoft.[3]

On September 2012, Telerik announced its acquisition of Fiddler and still maintained by Telerik as of present.[4]

Description

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Fiddler is a light application that once installed and enabled, creates a local proxy, monitoring all the data exchanged with another HTTP or HTTPS web service. This is a tool which does not encumber installed system and provide detailed logs, showing it is there any issue on the desktop-web service communication.[3] It will allow you to inspect traffic, set breakpoints thoroughly, and "fiddle" with the incoming or outgoing data, includes a powerful event-based scripting subsystem, and be extended using any .NET language.[1]

fiddler's other features include web session manipulation, web debugging and security testing for any networking related. Fiddler can debug traffic from virtually any application that supports a proxy, including Internet Explorer, Google Chrome, Apple Safari, Mozilla Firefox, Opera, and thousands more. You can also debug traffic from popular devices like Windows Phone, iPod/iPad, and others.[5]

References

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  1. 1 2 3 "Fiddler Web Debugger 6.0.20261 / 2.6.2.3". Major Geeks.com. Retrieved 28 August 2026.
  2. "Using Fiddler to inspect web service calls - Microsoft Game Development Kit". learn.microsoft.com.
  3. 1 2 "SAP Help Portal | SAP Online Help". help.sap.com. Retrieved 2026-08-18.
  4. "Telerik Buys Fiddler Debugging Tool". September 13, 2012.
  5. "Fiddler 5.0.2". TechSpot. Retrieved 28 August 2026.
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