Fiddler Everywhere | Client Certificate Authentication

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Last Updated: 06 Apr 2026 13:20 by Feylin

David

Created on: 22 Sep 2023 02:18

Type: Feature Request

Fiddler Everywhere | Client Certificate Authentication

Fiddler Classic implements and documents this feature. Is this true for Fiddler Everywhere? Can you provide instructions?

I can tell you what does not work on Windows 11:

Copying my client certificate to $env:USERPROFILE\Documents\FiddlerCore\ClientCertificate.cer

Copying my client certificate to $env:USERPROFILE\Documents\Fiddler2\ClientCertificate.cer

Copying my client certificate to $env:USERPROFILE\.fiddler\ClientCertificate.cer

Copying my client certificate to $env:USERPROFILE\.fiddler\Certificates\ClientCertificate.cer

Please provide detailed instructions for setting this up. Thank you.

4 comments

Feylin

Posted on: 06 Apr 2026 13:20

Hopefully this comes to attention at some point, Burp Suite has a perfect implementation of this.

Simply putting in Domain + load the Cert, no matter what Version of the Cert, it just works :)

ADMIN

Nick Iliev

Posted on: 06 Apr 2026 05:29

+1 from t.1712630

Regards,
Nick Iliev
Progress Telerik

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René

Posted on: 11 Dec 2023 13:36

This is must. I need to use old Fiddler just because this is missing in Everywhere. You should keep features from old Fiddler versions.

ADMIN

Nick Iliev

Posted on: 25 Sep 2023 08:38

Hello David,

Thank you for contacting Fiddler support and bringing the feature to our attention. Currently, Fiddler Everywhere does not support the use of client certificates. However, we have added this as a feature request and will explore the possibility of implementing it in the future.

Regards,
Nick Iliev
Progress Telerik

Love the Telerik and Kendo UI products and believe more people should try them? Invite a fellow developer to become a Progress customer and each of you can get a $50 Amazon gift voucher.