Run the installer by double-clicking the .exe file. Accept the license agreement after reading the terms. Choose the installation directory; the default path in Program Files is generally recommended. Click Install and wait for the progress bar to finish. Once completed, you can launch Fiddler directly from the installation wizard or your Start menu. Initial Configuration and HTTPS Decryption
Before you click a download link, it is important to understand that Telerik now offers two primary versions of the tool. Choosing the right one ensures you have the features necessary for your specific operating system and workflow. download fiddler setup
Downloading and installing Fiddler is the first step toward mastering web debugging and network analysis. Whether you are a software developer troubleshooting API calls or a system administrator monitoring web traffic, Fiddler is the industry-standard tool for inspecting HTTP and HTTPS protocols. This guide provides a comprehensive walkthrough on how to safely download the Fiddler setup, install the software, and configure it for your first session. Understanding the Different Fiddler Versions Run the installer by double-clicking the
Fiddler Classic is the original Windows-only version. It is a robust, feature-rich proxy server used for debugging traffic from virtually any application that supports a proxy. It remains a favorite for power users who require extensive scripting capabilities through FiddlerScript. Click Install and wait for the progress bar to finish
Open Fiddler and navigate to Tools, then Options. Select the HTTPS tab. Check the box that says Decrypt HTTPS traffic. Fiddler will ask to generate and trust a root certificate. Click Yes to allow this; this step is necessary for the proxy to "manually" decrypt the traffic for your viewing. Once this is set, you will be able to see full request and response headers, cookies, and JSON payloads for secure sites. Why Fiddler is Essential for Your Toolkit
Click the Download button to receive the executable file (for Windows) or the DMG/AppImage (for Mac and Linux). Installing Fiddler on Windows