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New Release! Sign up for the Telerik 2024 Q2 embedded reporting, mocking and
debugging tools release webinar on June 7 to find out what’s new.  

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DEBUGGING AND TROUBLESHOOTING MADE SIMPLE

Uncover software bugs when HTTP communication is involved. The Fiddler set of
tools helps you promptly identify errors to effectively fix them. Easily.

Try for Free
Fiddler Everywhere Fiddler Classic Fiddler Jam FiddlerCap FiddlerCore


WHICH FIDDLER DO I NEED?

Five Products, One Family, Extensive Debugging and Troubleshooting Tools.

Fiddler Everywhere Fiddler Classic Fiddler Cap Fiddler Core

--------------------------------------------------------------------------------

Web debugging proxy tool for MacOS, Windows, and Linux

 * Multiple options for capturing, including system proxy, preconfigured browser
   instance, and preconfigured terminal process
 * Support for multiple protocols, including HTTP(S), HTTP/2, WebSocket, and
   gRPC communication
 * Extensive Rules options for modifying traffic
 * Advanced filters for precisely narrowing down traffic
 * Composer functionality for creating, editing, and saving API requests
 * Sharing, saving, and collaboration options
 * Regular release cadence and dedicated support
 * SOC 2 certified


Try for Free
Learn more

Web debugging proxy for Windows

 * System proxy option for traffic capturing
 * Decoding and inspection of HTTP(S) requests and WebSocket communication
 * AutoResponder rules for modifying traffic
 * Basic filter options for narrowing down traffic
 * Basic composer functionality for quick API calls and requests edits
 * Community support


Try for Free*
Learn more

*Please be aware that Fiddler Classic is not in active development and offers no
commitments for releases, patches or tech support. By using this product, you
assume all associated risks. We recommend upgrading to Fiddler Everywhere.

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.


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Learn more

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.

Try for Free
Learn more


HOW TO START YOUR FIDDLER JOURNEY



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.




4.4 OUT OF 5 OVERALL USER RATING

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.


SUPPORT & LEARNING

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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.

Try for Free
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