Comparing Traffic

The Compare Sessions (BETA) feature is under active development and subject to additional changes and improvements in future releases.

Comparing Live Traffic Sessions

Fiddler Everywhere provides a comparing option for detailed differentiation of two or more captured sessions from the Live Traffic list.

  1. Set Live Traffic to Capturing and make the requests. As a result, the sessions are captured and displayed in the Live Traffic list.

  2. Select two sessions that you want to compare.

  3. Select the Compare option from the context menu and choose the Compare in Fiddler Everywhere nested option. Note that the Compare option is active only when two sessions are selected.

    Compare through the context menu

  4. Inspect both sessions in a new Compare Sessions (BETA) tab.

    Compare Sessions tab

Fiddler Everywhere loads both sessions side-by-side with the session with a lower ID to the left (named Group 1) and the session with the higher ID to the right (named Group 2). The differences are highlighted in the session inspectors by a red background highlight for the removed content from the primary session and a green background highlight for newly added content in the secondary session. Additional sessions can be added to both groups, simultaneously comparing multiple sessions.

Adding Sessions to the Compare Groups

You can add and compare more sessions by adding them to the comparison groups.

  1. Set Live Traffic to Capturing and make the requests. As a result, the sessions are captured and displayed in the Live Traffic list.

  2. Select one or more sessions that you want to compare.

  3. Select the Add to compare group option from the context menu and select the compare group where the session should be added.

    Add to compare group

Comparing Saved Sessions

With Fiddler Everywhere, you can compare previously saved sessions from the Sessions section.

  1. Select a saved entry from the Sessions section that you would like to compare.

  2. Select the Compare option from the context menu.

    Compare context menu in Sessions section

  3. Specify the primary and the secondary sessions you would like to compare. Optionally, choose a matching option.

    Choose sessions for comparision

  4. Inspect both sessions in a new Compare Sessions (BETA) tab.

Compare Sessions (BETA) Section

The Compare Sessions (BETA) section consists of a tab that loads a grid containing the sessions (or groups of sessions) and inspectors comparing the selected sessions' HTTP requests and responses. The section also has a toolbar that provides the comparing options and the ability to rearrange the tab user interface.

Comparing Options

The Compare Sessions (BETA) tab provides the following options to customize your comparing criteria.

  • Match sessions by—Highlights unmatched sessions with default criteria set to match by URL. The possible match options are as follows:

    • URL match to highlight sessions with different URLs.
    • Order match session by their order in their ID column. The ID is the Fiddler Everywhere unique identification for each captured session.

    Match sessions popup

  • Ignore Headers—You can use the popup to create an ignore list of specific requests and response headers from the matching.

    Ignore Headers popup

Additional Resources