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Fiddler Everywhere is a web debugging proxy tool which logs/capture all HTTP(S) traffic between your computer and the internet. Fiddler allows you to inspect traffic, set breakpoints, and “fiddle” with incoming or outgoing data. Fiddler includes a powerful event-based scripting subsystem, and can be extended using any .NET language. It is written by Eric Lawrence, formerly a Program Manager on the Internet Explorer development team at Microsoft.

Fiddler Web Debugger will 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.

Fiddler Everywhere Main Interface Screenshot

Depending on your company’s technology policy and requirements, it may be challenging to install and trust Fiddler’s HTTPS certificate. Fiddler now offers an alternative method for capturing and inspecting HTTPS traffic without trusting fiddler’s root certificate. However, you are still able to set up a Fiddler Root Certificate the old way, so you can capture traffic automatically when you start Fiddler Everywhere.

Easily manipulate and edit web sessions. All you need to do is set a breakpoint to pause the processing of the session and permit alteration of the request/response. You can also compose your own HTTP requests to run through Fiddler.

Fiddler lets you see the “total page weight,” HTTP caching and compression at a glance. Isolate performance bottlenecks with rules like “Flag any uncompressed responses larger than 25kb”.Ensure the proper cookies, headers and cache directives are transferred between the client and server. It supports any framework, including .NET, Java, Ruby.

Use Fiddler for security testing your web applications — decrypt HTTPS traffic, and display and modify requests using a man-in-the-middle decryption technique. Configure Fiddler to decrypt all traffic, or only specific sessions. For web traffic capture only you can download Telerik FiddlerCap. Usually, this action is performed to track down a bug in your web browser or a website.

Fiddler Everywhere Session Screenshot

What is the differance between Fiddler Everywhere and Fiddler Classic?

Fiddler is available in two main editions: Classic, and Everywhere. Everywhere edition includes all features of the original Fiddler Classic, plus a secure collaborative troubleshooting baked-in and a new modern user interface. Not to mention it’s adds support for macOS, and Linux too!

Fiddler Everywhere is offered in two versions: Free, and Pro. Fiddler Everywhere Pro adds extended sharing and collaboration options to the Free edition, such as capturing unlimited traffic, unlimited auto responder rules, creating unlimited saved sessions entries, can save unlimited sessions, up to 50MB shared session size, and email support. Compare.

Key Features:

  • Modern user interface
  • Web Debugging
  • HTTP(S) traffic recording and analysis
  • Share captured traffic with collaborators
  • Works seamlessly with any browser, application or process
  • Decrypt secure traffic (HTTPS)
  • Request and response mocking
  • Web Session Manipulation
  • Sharing and collaboration options
  • Security and performance testing
  • Customizing Fiddler
  • Compose API requests
  • HTTP2 Support

Download Fiddler Everywhere

Download for Windows

Download for Mac OS X

Last Update: June 06, 2024

Current Version:

License: Freeware / Shareware

Languages: Multiple Languages

Supported Operating Systems:
Windows XP / Vista / 7 / 8 / 8.1 / 10 (32-Bit, 64-Bit)
Mac OS X 10.9 or later

Developer: Telerik


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