Log all HTTP(S) traffic between your computer and the Internet.
Inspect traffic, set breakpoints, and fiddle with request/response.
Looking for Fiddler Classic? Download it here
Fiddler Everywhere is a web debugging proxy for any browser, any application, any process. Log and inspect all HTTP(S) traffic between your computer and the Internet, mock requests, and diagnose network issues. Fiddler Everywhere is available for macOS, Windows, and Linux.
Fiddler Everywhere takes Fiddler to a whole new level. We've completely revamped the entire user experience to make your tasks simple and more intuitive.
The revamped composer makes it easy to quickly compose and test any API requests and easily group and organize the requests.
Auto Responder gets a major update so you can effortlessly create and organize Auto Responder rules into groups.
Collaboration is easy in 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.
Join these companies and more than 10 million developers who are already building, running,
and debugging with Fiddler.
Debug traffic from macOS, Windows, or Linux systems and iOS or Android mobile devices. Ensure the proper cookies, headers, and cache directives are transferred between the client and server. Supports any framework, including .NET, Java, Ruby, etc.
Mock or modify requests and responses on any website. It’s a quick and easy way to change the request and responses to test websites without changing code.
Use Fiddler Everywhere to log all HTTP/S traffic between your computer and the Internet. Debug traffic from virtually any application that supports a proxy—Chrome, Safari, Firefox, Opera, Edge, and more.
Collaborate with your team by sharing captured traffic with the click of a button. Add more context by marking/highlighting the sessions, adding comments, and sharing the captured sessions over the cloud to collaborate with your teammates.
There’s a Fiddler for Just About Every Need
Original Fiddler Web Debugger tool — feature rich, functional and supported only on Windows
The power of Fiddler in your app. A .NET library that allows you to capture and modify HTTP and HTTPS traffic.
A lightweight companion tool to capture web traffic from end-users or from customer environments.
Fiddler is used by tens of thousands of users daily and they love it!
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.
Users of G2.com provide unbiased user reviews after they objectively access business software.