Stephen Wick

AutoResponder Action Supports Matching Groups

When defining a Rule within the AutoResponder tab, is it possible to use matching groups from the Match form field within the Action field?

For example: If I want to respond to a request for with content from I would create a rule like the following. This rule would also apply to any other page under

Match: regex:http://maint\.mysite\.com/(.+)

Please forgive me if this is already possible. Just let me know how to do it.


I Love this product.
Idea by Stephen Wick Status: New Comments: 1 Last update: 2015-01-20T17:39:28 by Eric Lawrence
Raivis Kalinins

Add "range: bytes" header support

I set a file to be replaced with AutoResponder and then tried doing request with

Range: bytes=179200-

but it appears that Fiddler returns the whole file not the requested range.

If I disable auto responder then the file is requested from my nginx server which servers the file correctly. (only the bytes I requested)

Version: Fiddler Web Debugger (v4.4.5.9)
Feature Request by Raivis Kalinins Status: New Comments: 1 Last update: 2015-01-20T17:38:20 by Eric Lawrence
Steven Miller


In the last month a problem has surfaced with FiddlerCap. When selecting Decrypt HTTPS, a warning regarding decrypting HTTPS traffic pops up. Saying OK to the message unchecks the Decrypt HTTPS box and than a message of "Sorry, unable to create root certificate" pops up.
Fiddler will install on those systems without an issue. However it is not ideal to request custoemr to run Fiddler instead of FiddlerCap.
Problem by Steven Miller Status: New Comments: 1 Last update: 2015-01-20T17:28:49 by Eric Lawrence
Aris Filokostas

Can an edited page be reloaded without the changes be lost?

I use the great "AutoResponder" feature to replace a page with my own one, so that I perform changes on that page.

However, this process takes several steps. Create the autoresponder, create local page with the same content as the online page, then edit it, etc.

I see that you have the "F2" function: "Unlock for Editing".

However, when I reload the page, all changes are lost.

Can you just add a checkbox, like this: "[ ] Keep changes when reloading the page"

Or something like that?

Maybe a solution already exists?
Feature Request by Aris Filokostas Status: New Comments: 1 Last update: 2015-01-20T17:27:57 by Eric Lawrence
Juan Marín Noguera

fiddler for mono doesnt work with https

I've been using Fiddler for Mono Alpha. Then, I activated HTTPS support. Now I can't access any web page, HTTPS or not. I've had to disable proxy in my browser settings.
Feedback by Juan Marín Noguera Status: New Comments: 1 Last update: 2015-01-20T17:25:54 by Eric Lawrence
Scott Laughton

Enable launching IE specifically from FiddlerCap

I don't know a single person that uses IE for their default browser. As FiddlerCap only launches the default browser this means to get FiddlerCap to capture a session from IE, I have to change my default browser to IE.

In windows 8 this means I have to do the following:
1) Win+S to open Search and type: IE then press Enter
2) Click gear icon, click Internet Options.
3) Click Programs Tab.
4) Click Set Programs button.
5) Click Set your default programs link.
6) Select IE from the list of default programs.
7) Click the Set this program as default button.
8) Close Set Defaults window.
9) Close Internet Options window.

and as I don't run IE as my default browser, I have to do that everytime I use FiddlerCap to capture IE, which in support and testing happens often.

Very inconvenient... so my suggestion is to create a way to launch all the browsers that FiddlerCap supports specifically, regardless of what the OS default browser is.


Feature Request by Scott Laughton Status: New Comments: 1 Last update: 2015-01-20T17:25:18 by Eric Lawrence
Ronen Zilberman

default session save directory

When saving sessions to a file, the initial directory opened in the dialog box is \Documents\Fiddler2\Captures in the current user's home.

It would be helpful if this dialog would remember the last saved location and open that instead. This is the behavior within a Fiddler session (i.e saving for a second time). The suggestion is to extend this between sessions too (closing and opening fiddler).

Thank you!
Idea by Ronen Zilberman Status: New Comments: 0 Last update: 2014-11-30T23:26:52 by Ronen Zilberman
Paavo Pihelgas

Bug in Fiddler's example

The Fiddler extension example at contains a bug. There is an extra closing parenthesis before line "return bResult;".
Problem by Paavo Pihelgas Status: New Comments: 0 Last update: 2014-10-25T16:20:19 by Paavo Pihelgas

Easier exclusion of hosts

At the moment it is very tedious to exclude certain hosts. For example I'd like to exclude Facebook, Google, Twitter, and dozens others that my normal browser usage generates. I cannot just enable the intranet filter because I need to inspect non-intranet traffic. Whitelisting does not work either because you might end up hiding important stuff without ever finding out.

Feature request: Add an exclusion menu item to the right click menu for a session in the session list. Assuming the host is "sub.domain.tld" add the following menu items:

Exclude "*.domain.tld"
Exclude "sub.domain.tld"
Exclude ""*.domain.tld;sub.domain.tld"

If multiple sessions are selected all hosts should be excluded in a single action.

This would be VERY handy. Users could build a meaningful filter list within a minute.
Feature Request by Status: New Comments: 0 Last update: 2014-10-18T15:18:54 by
Stephen Wick

Update the documentation for AutoResponders

Could you update the reference for AutoResponders in Fiddler?

As of v4.4.8.0 on 6/6/2014 I see that the following Actions are not documented:
- *ReplyWithTunnel
- *script:FiddlerScriptFunction
Feedback by Stephen Wick Status: New Comments: 0 Last update: 2014-06-06T22:18:33 by Stephen Wick
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