Fiddler Help

Getting Started

You can read a quick introduction to Fiddler on MSDN.  Or learn about Performance Tuning with Fiddler.

Get started quickly with Fiddler Demonstration Videos.

Consider subscribing to the Fiddler Blog.  Developer.com wrote a quick summary of getting started with Fiddler.

References

The User Interface Guide explains the overall Fiddler interface.

• Use the Options Dialog to configure Fiddler.
• Use the AutoResponder Tab to configure Fiddler to return local content for client requests.
• Use the Filters Tab to easily filter and perform lightweight traffic modifications.
• Use the QuickExec Box to more effectively use Fiddler from the keyboard.
• Learn hotkeys in the Keyboard Reference.

Problems? Check Known Issues and the FAQ.

Want to have Fiddler automatically used by your web client?  See Configuring clients.

Want to have Fiddler automatically rewrite requests and responses, add or remove headers, or flag/ignore sessions based on rules you specify?  Check out the FiddlerScript Cookbook.

Want to use Fiddler to store a log which can be viewed on another computer, for instance to troubleshoot problems at a customer site?  Check out Logging with Fiddler.

Want to use Fiddler to generate a WebTest file for playback with Visual Studio 2005? Check out Generating WebTests.

Need to use Fiddler with a client that can't use a proxy?  Try Configuring Fiddler as a Reverse Proxy.

Learn more about Decrypting HTTPS traffic with Fiddler2.

Books

Use of Fiddler is covered in the following books:

The following books were consulted during the development of Fiddler:

Training

Fiddler Sandbox - Learn to use Fiddler without the risk of damaging your data.

Advanced Fiddling - Learn how to use JScript Rules and Fiddler Inspectors to mark, breakpoint, view and edit traffic.

Useful Information

• HTTP References
• Unicode and Character Sets
• Regular Expressions Tutorial
• Fiddler License Agreement