Fiddler Everywhere

What's New

Keyboard Shortcuts

We’ve reworked Fiddler Everywhere’s keyboard shortcuts to make them easier to remember and use. They follow a logical structure, won’t clash with system shortcuts, and cover key actions to keep you moving without interruption. Capture traffic, filter sessions, and manage rules—all without breaking your flow.

Auth Inspector Tab for Requests

The new Auth Inspector tab in Fiddler Everywhere provides a dedicated space for analyzing authentication details in requests. Easily inspect and debug tokens, headers, and authentication flows to ensure secure and seamless API interactions. This enhancement simplifies troubleshooting auth-related issues, saving time and improving visibility into request security.

Redesigned Rules Logic and UI

We’ve improved how Fiddler Everywhere processes rules to ensure predictable and consistent behavior. Now, match conditions are evaluated only once—before a request is sent or before a response is returned—depending on when all required data is available. Rules execute in order, applying changes step by step, so each rule considers modifications made by previous ones.

Additionally, we’ve made execution clearer by ensuring all actions in a matched rule run as expected. If an action prevents further rule processing (like a “final” action), you’ll get a heads-up. And if request and response actions are mixed in a way that affects visibility in Fiddler, we’ll let you know so you can adjust accordingly. These refinements give you more control over how rules modify traffic while keeping things transparent and easy to manage

Drag-and-Drop Support for Rule Actions

Managing rules in Fiddler Everywhere is now more intuitive with drag-and-drop support for Rule actions. Easily reorder, modify, or organize actions within rules with a simple drag, streamlining rule management and customization. This enhancement improves efficiency, making it faster to fine-tune your debugging and traffic modification processes.

Redesigned Sizes View

The Sizes view has been redesigned for better clarity and real-time accuracy. Now, you can track request and response sizes as they update, even for sessions still in progress. The view reflects the exact sizes of data sent by the client and received by the server, with one exception—the response body. For responses, we also show the decoded size and the compression protocol used, giving you better insight into data transfer efficiency.

This update aligns with the Timings View, which provides detailed performance breakdowns. Together, they give a complete picture of network activity, helping you identify inefficiencies and optimize data transfer more effectively.