Fiddler is a web debugging proxy tool for Windows, macOS and Linux. It has evolved from Fiddler Classic into a more robust and versatile product - Fiddler Everywhere.

May 14, 2025 · Fiddler, free download for Windows. Tool that intercepts and analyzes HTTP and HTTPS traffic to help diagnose and debug web application issues.

Install and configure Fiddler Everywhere on Windows and learn how to capture, inspect, and modify the HTTPS traffic to analyze data effectively. This tutorial describes how to install and start using Fiddler …

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.

Fiddler Web Debugger is a serviceable web debugging proxy for logging all HTTP (S) traffic linking your computer to the internet, allowing for traffic inspection, breakpoint setting, and more.

Download and install Fiddler Classic web debugging tool. Watch a quick tutorial to get started.

Welcome to the GitHub repo for Fiddler Documentation. This repository contains the source content--written in Markdown--that we use to power the Fiddler Classic Documentation at …

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 …

Upon booting, Fiddler will check for new versions by hitting a web service on this server. If you'd prefer to only check for updates manually, select the option in Tools | Fiddler Options.

Download Fiddler Everywhere, the professionally built and supported web debugging proxy tool for Windows, macOS, and Linux. Free and fully-functional trial.