Download Fiddler Classic



Need Fiddler for Mac or Linux?

Try the new Fiddler Everywhere. Built from scratch to run on all major platforms.

Download Fiddler Everywhere

Getting Started with Fiddler Classic

More Fiddler Tools


Traffic viewing and modification for .NET applications


Capturing web traffic logs

FiddlerCap with Firefox

Capturing web traffic logs with Firefox

System Requirements

  • Supported OS: Windows XP to Windows 10
  • Framework: Fiddler2 requires .NET v2, Fiddler4 requires .NET v4
  • Disk Space: 8MB
  • Processor: 1GHz
  • Memory: 2 GB+ recommended

Updating Fiddler

Upon start, Fiddler checks automatically for new versions. If you'd rather check for updates manually, set the option in Tools -> Fiddler Options

Check also

Release History
More About Fiddler

The free web debugging proxy

More About Test Studio

Automated functional, load,
and performance testing

More Free Trials

All free trials for Telerik products
and services