Respond to Requests Requiring a Client Certificate

To specify the .CER file for Fiddler to return for a given session, add this FiddlerScript*:

    oSession["https-Client-Certificate"] = "C:\\test\\someCert.cer";

To specify a .CER file for Fiddler to return otherwise, place that .CER file in:

    %USERPROFILE%\My Documents\Fiddler2\ClientCertificate.cer

To generate a .CER file:

  1. Install the certificate in the Current User's Personal Certificate Store.

  2. Right-click the certificate in Personal Certificates Store.

  3. Click All Tasks > Export....