Fiddler - Extensions

This page contains useful extensions for Fiddler.  For best results, please ensure that you're running the latest version of Fiddler2. 

You can develop your own extensions using the IFiddlerExtension interface.

neXpert Performance Report Generator

neXpert is an add-on to Fiddler which aids in performance testing web applications. Learn more...

Syntax-Highlighting Addons

Three popular addons for formatting FiddlerScript, HTML, Javascript XML, etc, in one installer (437 kb).

• The RulesTab2 extension is a powerful way to edit your Rules script directly within Fiddler2.
• The FiddlerScript Editor is a standalone text editor that helps you edit script rules for Fiddler.  It offers syntax highlighting and a Class Explorer to help you author scripts. 
• The SyntaxView Inspector offers syntax-highlighting for HTML, JScript, XML, and other web formats.

JavaScript Formatter

Watcher - Passive Security Auditor

Watcher is a runtime passive-analysis tool for Web applications. It detects Web-application security issues as well as operational configuration issues. Watcher provides pen-testers hotspot detection for vulnerabilities, developers quick sanity checks, and auditors PCI and OWASP compliance auditing. It looks for issues related to mashups, user-controlled payloads (potential XSS), cookies, comments, HTTP headers, SSL, Flash, Silverlight, referrer leaks, information disclosure, Unicode, and more.  Learn more...

SAZ Clipboard

The SAZClipboard is a simple extension that allows you to open a .SAZ file outside of the main Fiddler UI.  You can then drag sessions between this clipboard from the Fiddler UI. Learn more...

Gallery

The Gallery extension displays thumbnails of all images found among the selected sessions.

RulesTab (sample)

The RulesTab extension is a lightweight way to tweak your Rules script directly within Fiddler2. This extension is not as powerful as the RulesTab2 extension above (no syntax highlighting or Intellisense), but it requires less memory.

Content-Blocking (sample)

The Content Blocker sample is a simple example of using IAutoTamper to block traffic based on URI.

Image-Flipper (sample)

The Image Flipper sample is a simple example of using IAutoTamper to automatically flip all downloaded images 180 degrees.

This list is provided for informational purposes only, and Microsoft makes no representations or warranties, either expressed, implied or statutory, regarding the items, manufacturers, or compatibility of the items available within. Some of the links below send you to sites that are not under the control of Microsoft. Microsoft is not responsible for the contents of any linked site or any link contained in a linked site or any changes or updates to such sites. Microsoft is providing these links to you only as a convenience, and the inclusion of any link does not imply endorsement of Microsoft.  Report a problem.

WCF Binary-Encoded Message Inspector

This inspector allows you to view WCF binary-encoded messages in a plaintext XML format. Learn more...

Chad Sowald's Request-To-Code

This extension converts a captured request into the C# or VB.NET code necessary to issue that request: http://www.chadsowald.com/software/fiddler-extension-request-to-code

Eyal's Extensions

- Eyal has written two extensions:

• Custom Columns & Latency Extension  (now somewhat obsoleted by Custom Columns feature of Fiddler v2.2.0.5)
• JSON Inspector (with Source)

XML Request Inspector