Microsoft Download Center Archive

Microsoft neXpert Performance Analysis Plugin

  • Published:
  • Version:
  • Category: Application
  • Language: English

neXpert is a Fiddler add-on which helps identify common web performance issues.

  • neXpert is an add-on to Fiddler which automates the classic performance best practice checks and produces a HTML report on the issues found in a Fiddler capture. neXpert adds the ability to insert step markers in Fiddler sessions to associate network objects together (create transactions). Using these steps, neXpert looks for performance issues and generates a HTML report based on the findings. A TCP model provided by Microsoft Research as well as a rudimentary algorithm to mimic web browser is used to generate response time predictions (Still considered Beta). More information can be found at the neXpert blog:


Status: Deleted

This download is no longer available on The downloads below are archives provided by the Internet Archive Wayback Machine from the Microsoft Download Center prior to August 2020.

FileSHA1 HashSize
neXpertV1.2.msia5275dd758ee29c22b9cfd5102500a30779dfb7c230 KB

System Requirements

Operating Systems: Windows 7, Windows Server 2003, Windows Server 2008, Windows Server 2008 R2, Windows Vista, Windows XP

  • Microsoft .NET Framework v2.0 or laterFiddler v2.2.9.4

Installation Instructions

  • 1. Download the file by clicking on the "Download" button.2. Select "Save” and specify a directory on your local disk.3. Install the package by running the self-extracting executable file. This will place the neXpert DLL and help file in the Fiddler2\Scripts directory of the user's My Document folder.