All New Fiddler Now available for Mac, Windows, and Linux

Goodness of Fiddler, built from scratch to work everywhere

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Any Browser

Telerik Fiddler web debugging proxy helps you record, inspect and debug traffic from any browser.

Any System

Debug web traffic from any Windows-based PC, Mac or Linux system and mobile devices alike.

Any Platform

Use Telerik Fiddler with any platform and language. Now supporting .NET Standard 2.0.

What is Fiddler Everywhere?

The web debugging proxy for any browser, system or platform. Fiddler is a web debugging tool which logs all HTTP(S) traffic between your computer and the internet. Inspect traffic, set breakpoints, and fiddle with incoming and outgoing data.


What Can You Use It For

HTTP/S traffic Inspection & Analysis

Use Fiddler to log all HTTP(S) traffic between your computer and the internet. Debug traffic from virtually any application that supports a proxy – chrome, Safari, Firefox, Opera and more.

Request and Response Mocking

Mock or Modify request and responses on any website. It’s a quick and easy way to change the request and responses to test websites without changes in the code.

API Composing

User Fiddler API Composer to quickly test APIs by creating and sending requests. Useful while developing new APIs or when testing existing APIs.

Capture network traffic

Capture live traffic between your computer and internet or export it to popular formats. The captured traffic can be used to debug issues, find performance bottlenecks or share it with your teammates.

What has Improved?

  • Refreshed UI

    Fiddler Everywhere is completely built from ground up, we have completely revamped the entire user experience to make your tasks simple and more intuitive.

  • Improved API Composer

    The Improved API composer makes it easy to quickly compose and test any API requests, we have also made it easy to group and organize the requests.

  • Request and Response Mocking (Autoresponder)

    AutoResponder gets a major update which makes it easy to create and organize AutoResponder rules into groups.

  • Collaborate with team

    Now collaboration is made easy in Fiddler. You no longer have to manually export the session or send the captured traffic through email, You can use Fiddler Everywhere to save the captured traffic, add comments and share it with your colleagues all without switching context from within Fiddler Everywhere.

Fiddler Insider Program

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It’s time to make the next step – to build Fiddler for Linux and Mac to be as good as Fiddler for Windows. And we need your help. Try it out and help us bring the most used features and scenarios faster to you.


Next Steps