Fiddler (software)

From Infogalactic: the planetary knowledge core
Jump to: navigation, search
Screenshot of Fiddler monitoring communication between a local computer and Wikipedia.
Original author(s) Eric Lawrence[1]
Developer(s) Eric Lawrence
Initial release 6 October 2003; 15 years ago (2003-10-06)[2]
Stable release / 30 December 2015; 2 years ago (2015-12-30)
Operating system Windows XP, 2003, Vista, 2008, 7, 8, 10,[3] Linux (Beta)[4]
Platform .NET Framework 4.0 & .NET Framework 2.0[3]
Size 1 MB
Type Packet analyzer[5]
License Freeware

Fiddler is an HTTP debugging proxy server application written by Eric Lawrence, formerly a Program Manager on the Internet Explorer development team at Microsoft.[1]


Fiddler captures HTTP and HTTPS traffic and logs it for the user to review (the latter by implementing man-in-the-middle interception using self-signed certificates).[6]

Fiddler can also be used to modify ("fiddle with") HTTP traffic for troubleshooting purposes as it is being sent or received.[5] By default, traffic from Microsoft's WinINET HTTP(S) stack is automatically directed to the proxy at runtime, but any browser or web application (and most mobile devices) can be configured to route its traffic through Fiddler.[citation needed]


On 6 October 2003, Eric Lawrence released the initial official version of Fiddler.[2]

On 12 September 2012, Eric Lawrence announced that Fiddler was acquired by Telerik and he would join the company to work on Fiddler on a full-time basis.[7]

On 23 December 2015, Eric Lawrence announced he was leaving Telerik in favor of Google's Chrome security team.[8]

See also


  1. 1.0 1.1 Lawrence, Eric (2005-06-06). "HTTP Performance". IEBlog. MSDN (Microsoft corporation). 
  2. 2.0 2.1 "Fiddler HTTP Debugger - Version Info". Retrieved 2012-08-17. 
  3. 3.0 3.1 "Fiddler Web Debugger - Get Fiddler". Retrieved 2016-01-04. 
  4. "Mono - Fiddler". Retrieved 2016-01-07. 
  5. 5.0 5.1 "Fiddler Web Debugger - Fiddler". Retrieved 2010-08-20. 
  6. Lawrence, Eric (January 2005). "Fiddler PowerToy - Part 1: HTTP Debugging". MSDN (Microsoft corporation). Retrieved 2007-01-15. 
  7. "Fiddler Telerik". Fiddler. September 2012. Retrieved 2012-09-12.  |first1= missing |last1= in Authors list (help)[not in citation given]
  8. "My Next Adventure". Lawrence. December 2015. Retrieved 2015-12-28.  |first1= missing |last1= in Authors list (help)[not in citation given]

External links

Further reading

  • Lawrence, Eric (15 June 2012). Debugging with Fiddler: The complete reference from the creator of the Fiddler Web Debugger. ISBN 978-1475024487.