Download Fiddler Classic
Progress® Telerik® Fiddler™ Classic is our Windows debugging tool for
individual, non-commercial use only.
Disclaimer: Fiddler Classic is not licensed for professional, commercial, or team use. For those workflows, use Progress® Telerik® Fiddler™ Everywhere.
Classic Quick Facts
- Windows only
- Individual, non-commercial use only
- Free
- Community support
- Basic traffic capture and manual inspection
- Traffic modification and response mocking
- Basic Composer support for quick API calls
Do More with Fiddler Everywhere
Fiddler Everywhere is the modern Fiddler tool for professional developers and teams debugging HTTP/S traffic across Windows, Mac, or Linux.
With Fiddler Everywhere, you can:
- Capture, inspect, modify, and replay HTTP/S traffic in a streamlined UI.
- Share sessions and collaborate across teams.
- Use Fiddler MCP to give coding agents captured traffic context.
- Use Agent Cache to replay model-provider responses and control AI workflow costs.
- Access active development, commercial support, and ongoing product enhancements.
Fiddler Classic does not Support Your OS
Start a free trial of our best-in-class network debugging solution expertly designed for Linux. Cross-platform debugging is easier than ever with:
- Amplified networking debugging features
- An attractive and intuitive UI
- Choreographed releases with new features and enhancements
- Dedicated technical support
Fiddler Classic does not Support Your OS
Start a free trial of our best-in-class network debugging solution expertly designed for macOS. Cross-platform debugging is easier than ever with:
- Amplified networking debugging features
- An attractive and intuitive UI
- Choreographed releases with new features and enhancements
- Dedicated technical support