Fiddler (software)

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Fiddler logo.png
Screenshot of Fiddler monitoring communication between a local computer and Wikipedia
Screenshot of Fiddler monitoring communication between a local computer and Wikipedia
Original author(s) Eric Lawrence[1]
Developer(s) Telerik
Initial release 6 October 2003; 14 years ago (2003-10-06)[2]
Stable release
5.0.20173.50948 / 15 December 2017; 8 months ago (2017-12-15)[3]
Operating system Windows XP, 2003, Vista, 2008, 7, 8, 10, macOS (Beta), [4] Linux (Beta)[5]
Platform .NET Framework 4.0 & .NET Framework 2.0[4]
Size 1 MB
Type Packet analyzer[6]
License Freeware[3]

Fiddler is an HTTP debugging proxy server application originally 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).[7]


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

On 12 September 2012, Lawrence announced that Fiddler was acquired by Telerik and he would join the company to work on Fiddler on a full-time basis.[8]

On 23 December 2015, Lawrence announced that he was leaving Telerik for Google's Chrome security team.[9] Telerik continues to develop Fiddler now.

In June 2018, Lawrence returned to Microsoft as Principal Program Manager.

See also[edit]


  1. ^ a b Lawrence, Eric (2005-06-06). "HTTP Performance". IEBlog. MSDN (Microsoft corporation). 
  2. ^ a b "Fiddler HTTP Debugger - Version Info". Retrieved 2012-08-17. 
  3. ^ a b "Fiddler Web Debugger". Softpedia. SoftNews. 15 December 2017. 
  4. ^ a b "Fiddler Web Debugger - Get Fiddler". Retrieved 2016-01-04. 
  5. ^ "Mono - Fiddler". Retrieved 2016-01-07. 
  6. ^ "Fiddler Web Debugger - Fiddler". Retrieved 2010-08-20. 
  7. ^ Lawrence, Eric (January 2005). "Fiddler PowerToy - Part 1: HTTP Debugging". MSDN (Microsoft corporation). Archived from the original on 2016-08-09. Retrieved 2007-01-15. 
  8. ^ Lawrence, Eric (September 2012). "Fiddler Telerik". Fiddler. Archived from the original on 12 September 2012. 
  9. ^ Lawrence, Eric (December 2015). "My Next Adventure". Retrieved 2016-02-06. 

Further reading[edit]

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

External links[edit]