Bugs. Happen. Debugging and Troubleshooting Reimagined

We believe in a holistic debugging and troubleshooting approach that is radically straightforward and intuitive. Fiddler is committed to delivering you successful outcomes and solving your pain points without sacrifice.

Which Fiddler Do I Need?

Five Products, One Family, Endless Debugging and Troubleshooting Capabilities.

Web debugging proxy for MacOS, Windows, and Linux

  • The most powerful web debugging proxy tool for MacOS, Windows and Linux with an enhanced UI.
  • Effectively share your findings and add context with built-in team collaboration.
  • Customize, save, and share rules to handle complicated requests with ease.
  • Unlimited sharing of saved sessions and requests for impressive efficiency gains and receive dedicated email support to stay on track.
  • Debugging features are supercharged in Fiddler Everywhere, allowing you to take debugging and testing to the next level without any added effort.

Web debugging proxy for Windows

  • The original trusted and secure (free) debugging proxy server tool for Windows.
  • Successfully log, inspect, and alter HTTP(s) network requests and server responses. Go from error to fix in record time.
  • Easily import/export requests in various format and take out the guess work.
  • Write custom scripts to speed up your troubleshooting efforts.
  • Debug at rapid speed and develop web communication code faster, leaving you more time for other tasks.

Web-based troubleshooting solution

  • A web-based end to end troubleshooting solution for support teams who need to get from error to fix in less time.
  • Capture web traffic, web console logs, and web app screenshots in three simple steps. Easy set-up and requires no programming.
  • Securely share all captured logs within your teams to quickly deliver valuable data for finding a solution.
  • Provide end-users a resolution with one shot, no more back and forth or hindered communications.

Desktop-based Capture App for Windows

  • A Windows only lightweight version of Fiddler designed for data-capture by non-technical users.
  • Capture web traffic and quickly send to your tech team for debugging. Eliminating the annoyances derived from hindered communications.
  • Share network traffic logs within your teams to jump-start the resolution process.
  • Provide end-users a more delightful analysis, communication, and resolution experience.

Embeddable .NET library

  • Reliable and powerful .NET library allowing you to capture and modify HTTP and HTTPS traffic to ensure everything works smoothly and securely.
  • Harness the power of a stable proxy engine to develop best-in-class features for your .NET solutions and stand out for your ingenuity.
  • Discover delays, missing services and threats in minutes not days.

How It Works


1 Try the Fiddler product(s) that aligns with your needs.

2 Integrate Fiddler into your workflow for rapid, elegant debugging and troubleshooting.

3 You’ll start realizing the high value of benefits of Fiddler through the acceleration of both your time and cost savings.

Hundreds of Thousands of Organizations
are Using Fiddler

Join these companies and the 4 million developers who are already building, running, and debugging with Fiddler.

Nasa, Visa, Microsoft Fox, Samsung, IBM World Bank Group, Volvo
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.

Fiddler Monthly Digest

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A Trial of Any of the Fiddler Products Gives You:​​

  • A fully functional version of the software.
  • Strict data privacy protection. Your data remains with you, it will never be shared.​
  • Easy upgrade path to a licensed product.
  • Full access to all online documentation, community forums and tutorials.