Fiddler Everywhere

Never Be Confined by Limitations When Debugging HTTP(S) Traffic.

Amplify your debugging efforts with a Web Debugging Proxy for any device or platform. Fiddler Everywhere is a pathway for all, supporting macOS, Linux and Windows.

What is Fiddler Everywhere?

Fiddler Everywhere is a secure and modern web debugging proxy for macOS, Windows, and Linux.
Fiddler Everywhere is a powerful tool to modify the response before it reaches the browser to test and debug web applications.
Fiddler Everywhere integrates with your workflow, and facilitates the mocking of requests, and accelerates the diagnosis of network issues.
Fiddler Everywhere delivers a choreographed approach that is straightforward yet yields measurable time and cost-savings.  

What's Supercharged in Fiddler Everywhere

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Overview Inspector
Robust Request and Response Mocking
  • Powerful Traffic Capturing

    Capture HTTP, HTTPS, including HTTP/2 (now in beta) and WebSocket traffic on Windows, macOS, and Linux right out of the box with Fiddler Everywhere.

  • Sophisticated User Experience

    Style your Fiddler Everywhere application, choosing between the alluring Default Light, Default Dark, Light Blue, or Dark Blue themes.

  • Nimble API Composer

    Fiddler Everywhere's API Composer makes it easy to quickly compose, test, group, and organize your API requests. You can make a new request from scratch or edit a request already captured by Fiddler Everywhere.

  • Insightful Overview Inspector

    Gain a whole new level of visibility when monitoring requests and completing a performance review. The new Overview Inspector comes with a range of widgets designed to up your performance game in a highly visual fashion.

  • Robust Rule Builder

    Your power tool for mocking server responses and simulating real-life scenarios. With Rule Builder, you can create rules and automatically triggering a specific request based on the conditions you specify.

  • Amplified Teamwork

    Rely on user-friendly and secure collaboration within 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 the 4 million developers who are already building, running,
and debugging with Fiddler Everywhere.

Nasa, Visa, Microsoft Fox, Samsung, IBM Continental Airlines, Volvo
Download Free Trial

Where and How to Use Fiddler Everywhere

Fiddler Everywhere is Feature-Rich

Base Features

  • Inspect Web Traffic (HTTP & HTTPS)
  • Inspect Mobile Device traffic
  • Export Captured Traffic
  • Repeat Requests
  • Edit Requests
  • Compose API Requests
  • Find in Requests
  • New UI themes
  • Cross-platform compatible
  • Save Sessions
  • Compose API Requests
  • Unlimited Rules - Rule Builder
  • HTTP/2 Support – Beta
  • Advanced Filters
  • WebSocket Support

Sharing & Collaboration

  • Share Traffic with Collaborators
  • Sharing of Sessions
  • Sharing of Composer Requests
  • Sharing of Rules
  • Add Context with Comments/Notes


  • Bulk Licensing Management
  • Policy-driven Installation
  • SSO

Upcoming Features

  • Bandwidth Simulation
  • Saved Filter
  • Compare Requests
  • Mask/Delete Requests with Sensitive Data
  • Performance Suggestions
  • Security Suggestions
  • Compare Snapshots
4.4 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 provide unbiased user reviews after they objectively access business software.

Additional Tools and Solutions in the Fiddler Family

There’s a Fiddler Product for Every Need

Fiddler Classic

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


Reliable and powerful .NET library allowing 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.

Fiddler Jam

A unified troubleshooting browser extension solution for support teams to report and fix bugs.

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