Fiddler is a HTTP proxy for MS Windows which can show and alter HTTP transactions.

  1. Start Fiddler.
  2. If your HTTP client is not using WinInet, configure a proxy server so that traffic is routed through Fiddler. Use as proxy localhost, port 8888.
  3. Do your request.
  4. Click on the corresponding HTTP call in Fiddler.
  5. If the request is compressed or encoded, decode it using the "Transformer" tab. Decoding a response in Fiddler
  6. The response can be viewed at the bottom of the tab. It can be opened in notepad and subsequently saved. Viewing a response in Fiddler