Fiddler Everywhere: The Web Debugging Proxy Tool Loved by Users Just Got Better

Log all HTTP(S) traffic between your computer and the Internet.
Inspect traffic, set breakpoints, and fiddle with request/response.

Looking for Fiddler Classic? Download it here

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Getting Started With Fiddler Everywhere

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What is Fiddler Everywhere?

Fiddler Everywhere is a web debugging proxy for any browser, any application, any process. Log and inspect all HTTP(S) traffic between your computer and the Internet, mock requests, and diagnose network issues. Fiddler Everywhere is available for macOS, Windows, and Linux.


What Has Improved?

  • Refreshed UI

    Fiddler Everywhere takes Fiddler to a whole new level. We've completely revamped the entire user experience to make your tasks simple and more intuitive.

  • Improved Composer

    The revamped composer makes it easy to quickly compose and test any API requests and easily group and organize the requests.

  • Request and Response Mocking (Auto Responder)

    Auto Responder gets a major update so you can effortlessly create and organize Auto Responder rules into groups.

  • Collaborate With Your Team

    Collaboration is easy in Fiddler Everywhere — no more manually exporting sessions or sending the captured traffic through email. Fiddler Everywhere lets you save captured traffic, add comments and share it with your colleagues — all without switching context.


500,000 Companies Are Using Fiddler Today

Join these companies and more than 10 million developers who are already building, running,
and debugging with Fiddler.

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Nasa, Visa, Microsoft Fox, Samsung, IBM Continental Airlines, Volvo

Where and How to Use Fiddler Everywhere

Web Debugging

Debug traffic from macOS, Windows, or Linux systems and iOS or Android mobile devices. Ensure the proper cookies, headers, and cache directives are transferred between the client and server. Supports any framework, including .NET, Java, Ruby, etc.

Request & Response Mocking

Mock or modify requests and responses on any website. It’s a quick and easy way to change the request and responses to test websites without changing code.

HTTP/S Traffic Recording

Use Fiddler Everywhere 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, Edge, and more.

Team Collaboration

Collaborate with your team by sharing captured traffic with the click of a button. Add more context by marking/highlighting the sessions, adding comments, and sharing the captured sessions over the cloud to collaborate with your teammates.

Additional Fiddler Tools

There’s a Fiddler for Just About Every Need

Fiddler Classic

Original Fiddler Web Debugger tool — feature rich, functional and supported only on Windows


The power of Fiddler in your app. A .NET library that allows you to capture and modify HTTP and HTTPS traffic.

Fiddler Cap

A lightweight companion tool to capture web traffic from end-users or from customer environments.

There’s a Reason Why We’re the
No. 1 Choice for so Many Developers

7.9/10 Ease of Use
7.9/10 Quality of Support
8.6/10 Ease of Setup

G2.com User Reviews


Fiddler is used by tens of thousands of users daily and they love it!

Don’t just take our word for it. G2 Users have consistently rated Fiddler 4.4 out of 5 stars. G2 is a renowned peer-to-peer review site that aggregates user reviews for business software.
Users of G2.com provide unbiased user reviews after they objectively access business software.

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