Fiddler Classic

A Web Debugging Proxy Tool for Windows

A Windows-only tool that logs HTTP(s) network traffic.

*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.

Achieve More with Fiddler Everywhere

Fiddler Everywhere is a modern, easy-to-use web debugging proxy tool for Windows, macOS and Linux which captures, logs, monitors and inspects all HTTPS traffic, allowing you detailed visibility into protocol-specific information, enabling thorough debugging and analysis.

Cross-Platform Compatibility

Fiddler Everywhere operates seamlessly across Windows, macOS, and Linux, whereas Fiddler Classic is limited to Windows.

Enhanced Protocol Support

Fiddler Everywhere supports modern protocols such as HTTP/2, gRPC, and Server-Sent Events, which are not available in Fiddler Classic. Thus, streamlining the processes and adding up to major time and cost efficiency.

Enhanced Traffic Rules

Fiddler Everywhere supports advanced traffic manipulation with multi-condition rules and actions, allowing request and response modifications—unlike Fiddler Classic—for greater flexibility in debugging and testing.

Try Fiddler Everywhere

What Can You Do With Fiddler Classic?

Inspector in Fiddler Classic

Skillfully Inspect HTTP/HTTPS Traffic 

Use Fiddler Classic to inspect HTTP/HTTPS traffic to and from browsers and desktop apps. The Traffic Inspector allows you to dive into the details of any specific network request.
Artfully Create HTTP(S) Requests 

You can access everything you need to create a new request from the API Composer tab. Communicate with the web server with precision, thus calling only the resources you want.
Masterfully Mock or Modify Requests

Mock services and help with testing behaviors triggered by responses from external providers. Use the AutoResponder to create mock responses and get closer to testing complete.

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with Fiddler.

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.