Explore Fiddler's web debugging tools and proxy solutions to debug, mock, capture, and modify web and network traffic.

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

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 …

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

Use Fiddler Everywhere to capture, inspect, debug, mock and export HTTP (s) network traffic on macOS, Linux and Windows.

Nov 17, 2025 · Fiddler Everywhere captures and logs all HTTPS, WebSocket, Server-Sent Events, gRPC, and Socket.IO traffic between your computer and the Internet and enables you to capture …

Fiddler Everywhere allows you to capture and analyze network traffic from macOS, Windows, Linux, inspect web sessions, remote API calls, cookies, and header properties in detail.

Nov 6, 2025 · In Fiddler Classic v2.2.0.5 and later, you can add new columns of your choice. The default text coloring of the Session entries derives from the HTTP Status (red for errors, yellow for …

Fiddler Everywhere allows you to monitor and record HTTP/S traffic, including HTTP/2 and WebSocket sessions for later play back. If needed, you can record and modify request parameters and headers …

Apr 15, 2020 · Learn about Telerik Fiddler, a free web debugging proxy for any browser that’s beloved by countless developers.