Capture HTTP, HTTPS, including HTTP/2 (now in beta) and WebSocket traffic on Windows, macOS, and Linux right out of the box with Fiddler Everywhere.
Fiddler Everywhere's API Composer makes it easy to quickly compose, test, group, and organize your API requests. You can make a new request from scratch or edit a request already captured by Fiddler Everywhere.
Gain a whole new level of visibility when monitoring requests and completing a performance review. The new Overview Inspector comes with a range of widgets designed to up your performance game in a highly visual fashion.
Your power tool for mocking server responses and simulating real-life scenarios. With Rule Builder, you can create rules and automatically triggering a specific request based on the conditions you specify.
Rely on user-friendly and secure collaboration within Fiddler Everywhere — no more manually exporting sessions or sending the captured traffic through email. Fiddler Everywhere lets you save captured traffic, add comments and share it with your colleagues — all without switching context.
Avoid the risk of costly oversights.
Debug traffic from macOS, Windows, or Linux systems and iOS or Android mobile devices. Ensure cookies, headers and cache directives are transferred between the client and server.
Deliver better outcomes.
Mock or modify requests and responses from any app. It is an uncomplicated way to change the request and responses to test any app without changing the code.
Access network logs in seconds.
Use Fiddler Everywhere to log all HTTP/S traffic between your computer and the Internet, including WebSocket communication. Debug traffic from any app that supports a proxy.
Create a brilliant, efficient team.
Collaborate with your team by sharing captured traffic with the click of a button. Accurately add comments and safely share them with your colleagues. Designed to be secure.
Inspect Requests Behavior with HTTP/2 Version
Quickly debug issues without having to worry about the responses varying based on the protocol version. Now when using an HTTP/2 connection, you can rely on Fiddler Everywhere.
Optimize your development and testing process.
Expertly capture, debug, inspect, and modify mobile traffic with ease in a few simple steps! Utilize a single proxy setup on macOS, Linux, Windows, Android, and iOS.
With Fiddler Everywhere you can capture, inspect, alter, and replay network traffic - on any browser, any device, and any platform.
Test new features and legacy code by inspecting network traffic and composing rules to diagnose potential problem scenarios, before they occur in production.
Use Fiddler Everywhere to quickly inspect and diagnose customer issues faster than ever before.
Don’t just take our word for it. G2 Users have consistently rated Fiddler 4.4 out of 5 stars. G2 is a renowned peer-to-peer review site that aggregates user reviews for business software.
For individual and smaller teams that need to
securely debug without sacrifices
There’s a Fiddler Product for Every Need
Original Fiddler Web Debugger tool — feature rich, functional and supported only on Windows.
Reliable and powerful .NET library allowing you to capture and modify HTTP and HTTPS traffic.
A lightweight companion tool to capture web traffic from end-users or from customer environments.
A unified troubleshooting browser extension solution for support teams to report and fix bugs.