Last Updated: 31 Mar 2022 05:20 by ADMIN


Currently the composer window allows you to edit the cookies only as a header, that can turn into a nightmare when all of the cookies accumulate to the length of 500-1000 chars and you're trying to edit a single cookie.

The editing box shows only about 70 chars, so navigating to that single cookie you want to edit/delete is nearly impossible.

If you could add a dedicated tab for cookies, like in the inspectors window, that would be very helpful.



Last Updated: 22 Sep 2021 08:20 by ADMIN
Scheduled for Fiddler Everywhere Sprint 2
Fiddler Everywhere cannot currently open any password-protected .saz archives saved from the Windows version of Fiddler.  Need to be able to open password-protected .saz archives and save captures as .saz archives with password protection.  Thanks in advance for any help on this.
Last Updated: 22 Sep 2021 08:17 by ADMIN
I installed Fiddler Everywhere on Fedora 31. Clicking "View full response" for any response opens a pop-up window which is reasonably sized, but the content of which is a scrollable area about one line high at the top of the window and there is no obvious way to expand it to see more than one line of the response. Screenshot attached.
Last Updated: 22 Sep 2021 07:55 by ADMIN
Created by: Ryan
Comments: 10
Type: Bug Report

I fire up Fiddler Everywhere on my Mac. Generally, it appears to do nothing.

In further detail, "Stream" and "Decode" can be toggled, but otherwise do nothing. The connections icon has a hover-over describing my host and states I have a network connection. The help icon goes to the very limited documentation via browser. The settings icon pops open the settings dialog, which does appear to save changes, but not impact the "nothing" being done by the application. The capture button and inspectors button appear to do nothing. The main viewing area states "No records available." The area to the right of the main area states "Please, select a single Web Session to inspect." And that is it.

Either I'm doing (or not doing) something dumb, or it just isn't working for me. Any help would be appreciated :)

Mac specs: High Sierra 10.13.6, 2.6GHz i7, 16 GB memory

Last Updated: 03 Sep 2021 00:28 by Daniel

Colleagues, please add an essential feature of Fiddler Classic called Automatic breakpoints


I'm sure that a bunch of people will migrate to Fiddler Everywhere if you implement this



Last Updated: 19 Jul 2021 08:09 by ADMIN

Currently, Fiddler Everywhere capture every https traffic. Sometime, decrypt all https traffic are inconvenience and totally make the network broken (eg: Android 7+ devices). Please add this feature of Fiddler Classic.



Last Updated: 29 Mar 2021 14:51 by ADMIN
Created by: Scott
Comments: 1
Type: Feature Request

I am testing an api that uses basic auth.  I am trying to use the composer to hit the API.  The existing suggestion is to build the authorization header by hand, but I would suggest that the URL field should be able to handle any URL that a browser or CURL can handle, and so I think it should be able to handle basic auth syntax in the URL, for example:


Currently it takes the user and password and separators and sends the whole thing to DNS ("myUser:p@330rd@someserver.com").  Even if it ignores the username and password (and why would you) it should parse them out before sending the hostname to DNS.  I would be OK with it building the authorization header and removing it from the URL, but I would rather it handle that behind the scenes and leave the URL the way I pasted it in.

Last Updated: 02 Mar 2021 14:38 by ADMIN


When I try to trusst the fiddler root certifficate, I get the message "not successfull" and see a line like this in the logfile:

[2021-03-01 16:29:48:866] [Information] [Fiddler] Error when trying to check if certificate is trusted: '.', hexadecimal value 0x00, is an invalid character. Line 304, position 38.

I also tried to trust the certificate by hand via the keyring utility.

What can I try?



Last Updated: 22 Aug 2020 02:10 by Tim

Fiddler for Windows allowed you to add custom columns to Web Sessions list. 

Fiddler Everywhere needs this option so I can add in a column to show the IP address of the server being connected to.

Can these methods be added into Fiddler Everywhere:

  1. https://docs.telerik.com/fiddler/knowledgebase/fiddlerscript/addcolumns
  2. https://docs.telerik.com/fiddler/Observe-Traffic/Tasks/ConfigureColumns 
Last Updated: 03 Aug 2020 13:20 by ADMIN
Scheduled for FiddlerCore Release

Hi there,

I've successfully setup fiddler-everywhere 0.4.0 and am able to sniff traffic to various websites on my linux (Ubuntu 18.04) laptop. However some https sites are not working - fiddler-everywhere severs the connection at the SSL handshake phase. These same sites work in the windows version of Fiddler (v 5.0.20192.25091 - built 04 June 2019) however.

What is the status of the SSL support in fiddler-everywhere vs windows Fiddler?

Example site that fails over https:

Example site that works over https:

Fiddler captures for absa.co.za


CONNECT www.absa.co.za:443 HTTP/1.1
Host: www.absa.co.za:443
Connection: keep-alive
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36

A SSLv3-compatible ClientHello handshake was found. Fiddler extracted the parameters below.

Version: 3.3 (TLS/1.2)
Random: 1F 0E B0 54 5D 66 42 82 C9 A8 A6 D5 8F C2 F0 C6 A8 16 0C 8E 14 45 F2 B4 B5 95 92 66 B6 53 D6 F4
"Time": 2015/01/09 19:21:35
SessionID: empty
	0x5a5a		empty
	server_name	www.absa.co.za
	extended_master_secret	empty
	renegotiation_info	00
	elliptic_curves	unknown [0xBABA), unknown [0x1D), secp256r1 [0x17], secp384r1 [0x18]
	ec_point_formats	uncompressed [0x0]
	SessionTicket	empty
	ALPN		h2, http/1.1
	status_request	OCSP - Implicit Responder
	signature_algs	sha256_ecdsa, Unknown[0x8]_Unknown[0x4], sha256_rsa, sha384_ecdsa, Unknown[0x8]_Unknown[0x5], sha384_rsa, Unknown[0x8]_Unknown[0x6], sha512_rsa, sha1_rsa
	SignedCertTimestamp (RFC6962)	empty
	0x001b		02 00 02
	0xeaea		00
	[5A5A]	Unrecognized cipher - See http://www.iana.org/assignments/tls-parameters/
	[002F]	TLS_RSA_AES_128_SHA
	[0035]	TLS_RSA_AES_256_SHA




HTTP/1.1 200 Connection Established
FiddlerGateway: Direct
StartTime: 10:28:40.706
Connection: close

fiddler.network.https> HTTPS handshake to www.absa.co.za (for #329) failed. System.IO.IOException Unable to read data from the transport connection: Connection reset by peer. < Connection reset by peer

Last Updated: 10 Jun 2020 06:25 by ADMIN
I love the FiddlerScript feature. Will Fiddler Everywhere have this feature? Or maybe command-line feature?
Last Updated: 01 Jun 2020 13:57 by ADMIN
Created by: Leonardo
Comments: 1
Type: Feature Request

I'm not 100% sure if this is a bug or it's a feature (of lack thereof) but it goes like this:

On regular fiddler, a great thing to do is to simply copy a raw request to the raw composer, change a param and re-issue it... Fiddler everywhere does not allow that! I have to write headers on a tab and the body on another and yet, there's a "Raw" tab.

The Raw tab unfortunately is not editable (read-only)... I believe that it should be editable

Last Updated: 01 Jun 2020 06:31 by ADMIN
Created by: Jonathan
Comments: 1
Type: Feature Request
It would be nice if I could right click on a header from a capture and quick add to the capture filter instead of coping and pasting.
Last Updated: 21 May 2020 06:15 by ADMIN
Fiddler Everywhere   (How to set up my country's language, I saw PAK language pack file)
Last Updated: 20 Mar 2020 16:49 by ADMIN
Created by: Daniel
Comments: 1
Type: Feature Request
In Fiddler on my windows machine I'm able to edit the customrules.cs file in order to tell Fiddler where to look for a cert. Having just switched to a Mac I'm eager to do the same with my install of Fiddler Everywhere but I can't find the file or any reference to it. Is this a missing feature or an error on my part?
Last Updated: 06 Feb 2020 21:19 by Robert Colbert

Describe the bug
When the location of the Windows Desktop is changed (e.g. like described here), the functionality for exporting the root certificate is not working.

To Reproduce
Steps to reproduce the behavior:

  1. Change the location of the Desktop on Windows OS
  2. Run Fidder Everywhere, ensure that Setting -> HTTPS -> Decrypt HTTPS traffic is checked
  3. Press Settings -> HTTPS -> Decrypt HTTPS traffic -> Export root certificate to Desktop
  4. Error message is shown in a tooltip:

Could not find a part of the path 'C:\Users<username>\Desktop\FiddlerRootCertificate.crt'.

Expected behavior
The certificate is exported.

Desktop (please complete the following information):

  • OS: Windows 10
Last Updated: 16 Oct 2019 13:36 by ADMIN
Created by: Carsten
Comments: 1
Type: Bug Report

Fiddler can't connect to domains with 3 consecutive hyphens.

This error occurs:

fiddler.network.https> HTTPS handshake to r1---sn-ab5szn7e.googlevideo.com (for #793) failed. System.ArgumentException Decoded string is not a valid IDN name.
Parameter name: unicode


To reproduce:

Start Fiddler Everywhere (at least on Mac), make sure HTTPS decryption is enabled.

Go to www.youtube.com and try to watch a video.

The aforementioned error will occur in Fiddler.

Last Updated: 07 Jun 2019 08:55 by ADMIN
Created by: Jared
Comments: 0
Type: Feature Request
It would be great to have the same Host Remapping support that Fiddler2 has.
Last Updated: 20 May 2019 14:47 by ADMIN
Created by: Administrator
Comments: 2
Type: Feature Request

I search use Socks5 and received answers:


Fiddler supports SOCKS4a version. If you are trying to use another SOCKS version, this might be the reason why it is not working.

Could you please, elaborate on the error you receive.

Progress Telerik


He advised me to create a new request!

Will what I want to be done?