The Web Sessions List

The Web Sessions list contains the list of HTTP Requests that are sent by your computer. You can resize and reorder the columns in this list for your convenience. You can also sort this list by clicking on the column header.

Certain key information is available in this list, including:

• # - An ID# of the request generated by Fiddler for your convenience
• Result - The Result code from the HTTP Response.
• Protocol - The Protocol (HTTP/HTTPS/FTP) used by this session
• Host - The hostname of the server to which the request was sent
• URL - The path and file requested from the server
• Body - The number of bytes in the Response body
• Caching - Values from the Response's Expires or Cache-Control headers
• Process - The local Windows Process from which the traffic originated
• Content-Type - The Content-Type header from the Response
• Custom - A text field you can set via scripting.
• Comments - A text field you can set from scripting or the session's context menu

In Fiddler v2.2.0.5 and later, you can add new columns of your choice.

The default text coloring of the Session entries derives from the HTTP Status (red for errors, yellow for authentication demands), traffic type (CONNECT appears in grey), or response type (CSS in purple, HTML in blue; script in green, images in grey). You can override a session's text color using the ui-color flag in FiddlerScript.

Each session is marked with an icon for quick reference:

•  Request is being sent to the server
•  Response is being read from the server
•  Request is paused at a breakpoint
•  Response is paused at a breakpoint
•  Request used HTTP HEAD method; response should have no body
•  Request used HTTP POST method
•  Request used HTTP CONNECT method; this establishes a tunnel used for HTTPS traffic
•  Response was HTML
•  Response was an image
•  Response was a script
•  Response was Cascading Style Sheet
•  Response was XML
•  Response was JSON
•  Response was an audio file
•  Response was a video file
•  Response was a Silverlight applet
•  Response was a Flash applet
•  Response was a font
•  Generic successful response
•  Response was HTTP/300,301,302,303 or 307 redirect
•  Response was HTTP/304: Use cached version
•  Response was a request for client credentials
•  Response was a server error
•  Session was aborted by the client, Fiddler, or the Server.