Fiddler
WindowsPowerful web debugging proxy for Windows developers
Overview
Fiddler is a leading web debugging proxy for Windows, capturing HTTP/HTTPS traffic between local apps and the internet. It integrates seamlessly with Windows 10/11, Visual Studio, Edge DevTools, and other native tools. Features include real-time request/response inspection, breakpoint editing, performance profiling, and session replay. Ideal for developers troubleshooting APIs, optimizing web app load times, or testing cross-platform traffic via Windows. Supports extensions for custom workflows and uses Windows security to enable safe HTTPS decryption. The free Classic version suits basic needs, while paid tiers add cloud sync and team collaboration.
Key Features
- Capture and analyze HTTP/HTTPS traffic from Windows applications
- Modify requests/responses in real-time with breakpoints
- Integrate with Windows development tools like Visual Studio and Edge DevTools
Frequently Asked Questions
? Is Fiddler compatible with Windows 11?
Yes, both Fiddler Classic and Fiddler Everywhere are fully compatible with Windows 11, including support for its security features to decrypt HTTPS traffic.
? Is it safe to install Fiddler on Windows?
Absolutely—Fiddler is developed by Progress Telerik, a reputable software company. Always download from the official website to ensure you get the secure, unmodified version.
? Does Fiddler have a portable version for Windows?
Yes, Fiddler Classic offers a portable version that runs directly from a USB drive or folder without installation. Paid tiers like Fiddler Everywhere do not have a portable option.
Top Alternatives
Tool Info
Pros
- ⊕ Free Classic version for basic debugging needs
- ⊕ Deep Windows integration with native developer tools
- ⊕ Extensible via community plugins and custom scripts
Cons
- ⊖ Paid subscription required for advanced features (cloud sync, team collaboration)
- ⊖ Steep learning curve for new users unfamiliar with proxy tools
- ⊖ Occasional slowdowns when handling large traffic volumes