To see secure traffic, go to Tools > Options > HTTPS and check the box for "Decrypt HTTPS traffic." You will be prompted to install a root certificate; accept this to enable decryption. Fiddler 4 vs. Fiddler Everywhere

Fiddler 4 is the classic version of the Fiddler proxy, built specifically for the .NET 4 framework on Windows. While Telerik has since released "Fiddler Everywhere" for cross-platform use, Fiddler 4 (often called Fiddler Classic) remains the preferred choice for power users who require extensive scripting capabilities and a deep Windows integration. Key Features and Benefits

Below is a comprehensive guide on why you should download Fiddler 4, its core features, and how to get started. Why Download Telerik Fiddler 4?

If your mobile app or frontend isn't receiving the correct data, Fiddler 4 lets you see exactly what the API is returning. You can pinpoint if the issue is a 404 error, a malformed JSON body, or a slow response time. 2. Security Auditing

Fiddler acts as a man-in-the-middle proxy, allowing you to decrypt and inspect encrypted HTTPS traffic to see what’s happening inside secure sessions.

Best for macOS and Linux users. It features a modern UI, collaborative features for teams, and a streamlined interface, though some advanced features require a subscription. Common Use Cases 1. API Debugging