Fiddler v2.x
Click here to see latest Beta change log.
Version 2.4.2.6 - Released 1/21/2013
Improved ImageView
Improved TextWizard
Many bugfixes
Version 2.4.2.4 - Released 11/30/2012
Search-by-column
Protocol Violation list
Improved Performance
Enhanced AutoResponder
New layout option (View > Layout)
Enhanced Fiddler Options dialog
Various bugfixes
Version 2.4.1.1 - Released 9/15/2012
Added Encodings panel to TextWizard
Support Triple-click in the Scratchpad
Improved EnableLoopback utility
Update contact addresses
Various bugfixes
Version 2.4.1.0 - Released 8/28/2012
Improved Timeline
Improved AutoResponder
Enhanced HTTPLint
Various bugfixes
Version 2.4.0.6 - Released 8/16/2012
Improved performance
Improved screenshot
Improved Composer
Improved QuickExec
Improved AutoResponder
Many bugfixes
Version 2.4.0.0 - Released 6/23/2012
Improved JSON decoder
Many bugfixes
Version 2.3.9.9 - Released 6/3/2012
Implement HTTP->FTP Gateway
Improved Authentication support
Improved request encoding support
Improved HAR import
Enhanced AutoResponder
Improved WebSocket support
Various bugfixes
Version 2.3.9.5 - Released 3/30/2012
Improved error handling
Minor new features
Version 2.3.9.3 - Released 2/27/2012
WebView supports all font types
Full TLS Extensions support
Improved Script Engine
Improved Performance
Various bugfixes
Version 2.3.8.5 - Released 1/23/2012
Enhanced Performance
Enhanced Inspectors
Important bugfixes
Version 2.3.7.4 - Released 10/20/11
Major rewrite of HTTPS/WebSocket handling
Add File Upload to Composer (nee Request Builder)
Add Capture FTP checkbox
New overloads to BindUIColumn and AddBoundColumn to indicate column should be sorted numerically
Expose Original Session ID in Comments field when reloading SAZ file
Add HTTPS-decryption process filter
Add POST and quotationmark-encoding support to WCATExporter
In HTTPS-decryption, if we can't get the certificate, don't fail entirely, instead treat as a blind tunnel.
Add "Save and Open as Local &File" context menu
Enhanced File Exporter
Add FiddlerGotRequestHeaders and FiddlerGotResponseHeaders timers
Add HostList class for faster and more standardized handling of Hostnames.
Add "Run Filters now" to Filter's Action button.
Add more XML code description attributes
Enhanced AutoResponder
sTunnel field converted to property with correct accessors [Breaking change]
Various bugfixes
Version 2.3.6.7 - Released 10/20/11
Various bugfixes
Version 2.3.6.4 - Released 10/4/11
Request Cookie Inspector
Automate firewall exemption
Inspect in New Window command
Improved Inspectors
Troubleshooter for Filters on the Help menu
Various UI improvements
Various bugfixes
Version 2.3.4.4 - Released 6/22/11
AutoUpgrader
Tweaks for Firefox 5
Assorted bugfixes
Version 2.3.4.2 - Released 6/16/11
New features on the AutoResponder tab's context menu
Improved support for Apple iOS HTTPS Interception (requires add-on)
JSON Inspector
Assorted bugfixes
Version 2.3.3.3 - Released 4/24/11
Add!dns [hostname] and !nslookup [hostname] to list DNS info to Log tab
Add !listen PORT [CERTHOSTNAME] to QuickExec
Add audio/video/font/silverlight/flash/HTTP-POST Session icons
Revamp a few toolbar icons
Enable +/- latency adjustments using AutoResponder
Add fiddler.ui.inspectors.request.alwaysuse and fiddler.ui.inspectors.response.alwaysuse preferences
Changed "Remove Un-Marked" to ignore breakpointed sessions
Added fiddler.ui.CtrlX.KeepMarked and fiddler.ui.CtrlX.PromptIfMoreThan # (to replace CONFIG.iPromptBeforeClearAll)
Add Screenshot toolbar command, including delay option
Delay-Create FiddlerScript file behind pref "fiddler.script.delaycreate", defaults to true
Add IE10 User-Agent to default rules
Add AlwaysFresh option to Performance menu
Add fiddler.requestbuilder.followredirects.max preference
Add actInvertSelectedSessions() with hotkey of CTRL+I
about:network is now a synonym for about:connectoids
Add support for SELECT @REQUEST.HEADER VALUE, use * to test for existence or "\*" to match on a literal star.
Various bugfixes
Version 2.3.3.0 - Released 4/12/11
Improved AutoResponder with latency and per-rule editor
Add support for QuickLinkMenu and QuickLinkItem
Various bugfixes
Version 2.3.2.7 - Released 4/3/11
Allow save/load of session content to FARX file, using compression if needed
Added "Open URL" to AutoResponder rules menu
Add "11" to Options > Font Size dropdown; enable CTRL+Plus, CTRL+Minus, CTRL+0
Set the mouse cursor for the interactable panels on the Status Bar
Support sequential requests via # token in RequestBuilder
Don't trim a User-Marked/Commented session
Add "Remove Un-Marked" to toolbar menu
Update _replaceVirtualHostnames to update request line for CONNECT tunnels
Fixed the directly-specified Proxy script handling code; added fiddler.network.gateway.DetermineInProcess preference
Fix AutoResponder's Connect+AlternateURL scenario
AutoResponder now emits detailed 404 error if session has a process ID or was generated by Fiddler
Update installer for Win7+ You must use "Turn Windows features on or off" in the Control Panel to install or configure Microsoft .NET Framework 2.0 SP2 for Windows 7+
Version 2.3.2.3 - Released 2/12/11
Improved Performance
Improved AutoResponder
Improved support for Windows Phone emulator
Edit preferences with about:config
Various small improvements
Lots of bugfixes
Version 2.3.0.5 - Released 10/1/10
Various small improvements
Lots of bugfixes
Version 2.3.0.0 - Released 7/23/10
Various small improvements
Lots of bugfixes
Version 2.2.9.6 - Released 6/24/10
Import/Export feature
Tons of bugfixes
Version 2.2.8.6 - Released 1/28/10
Added -viewer switch for new "view only" mode
Improved Filters tab
Improved Request Builder
Improved FiddlerHook for Firefox
Various bugfixes
Version 2.2.7.5 - Released 11/9/09
64-bit support
Added Tools > HOSTS
Improved inspectors
Improved performance
Various bugfixes
Version 2.2.4.2 - Released 8/4/09
Improved Text Encoder/Decoder
Improved performance
Improved FiddlerHook
Various bugfixes
Version 2.2.2.0 - Released 4/18/09
New Fiddler toolbar
Improved Timeline
Performance and fidelity improvements
Include WebView inspector by default
Various bugfixes
Version 2.2.1.4 - Released 3/31/09
Added FiddlerHook Firefox Extension
Hook all connections by default
Improved TextWizard
Improved default behavior of Find dialog
Allow drag/drop of files to AutoResponder to create new rules
Assorted bugfixes
Version 2.2.0.7 - Released 12/17/08
Assorted bugfixes
Version 2.2.0.5 - Released 12/1/08
"Monitor all connections" option
Support for commenting on sessions
Enhanced QuickExec
Added "Decode compressed content" option to Find Sessions
UI columns now extensible via BindUIColumn or AddBoundColumn APIs
Unlocking of sessions (see context menu) for editing after completion
Assorted bugfixes
Version 2.2.0.0 - Released 11/11/08
Improved Autoresponder
Improved user-agent spoofing
Improved performance
Support for BZip2 compression
Version 2.1.9.2 - Released 9/16/08
Lightweight process filter in status bar
New "quiet mode" feature (-quiet on command line)
Improved request builder
Various bugfixes
Version 2.1.8.2 - Released 8/5/08
Improved AutoResponder, including playback from .SAZ file
Support http://ipv4.fiddler and http://ipv6.fiddler
Added > < and = operators to QuickExec
Improved HTTPS Certificate Error handling
Filter rules automatically reload
Minor performance improvements
Various bugfixes
Version 2.1.6.2 - Released 5/3/08
Improved Fiddler Options dialog
ProcessID column added to Session List
Process Filter added to Filters tab
Improved Upstream Gateway support
Improved Performance
AutoStream Video option
Various bugfixes
Version 2.1.4.4 - Released 3/10/08.
Improved HTTPS support
Improved installer compatibility with Vista
Fixed Win2k bug preventing use of Fiddler
Version 2.1.4.2 - Released 3/1/08.
Improved Inspectors and Extensions
Map requests back to process ID (oSession.oFlags["x-ProcessInfo"])
Added Response Templates
Improved AutoResponder (RegEx support)
Various bugfixes
Version 2.1.3.6 - Released 1/28/08.
SmartScroll of Session List
Enhanced Timers
Many bugfixes
Version 2.1.2.0 - Released 11/12/07.
Improved APIs for automation
Improved inspectors
Improved SimpleFilter tab
Improved HTTP compression efficiency
Improved international support
Improved TextWizard
Many bugfixes
Version 2.1.1.1 - Released 9/15/07.
New context menu Select Parent/Children/Duplicates (or hit D,C,P)
SimpleFilters tab now included by default
Improved Session Archive File format with timestamps
Improved streaming mode
Improved inspectors
Improved performance
Improved extensibility
Improved international support
Improved search box
Improved Header editor including header templates
Many bugfixes
Version 2.1.0.4 - Released 7/6/07.
General Improvements
Introduced Client certificate support
Improved performance
Numerous bugfixes
Extensibility Improvements
Added FiddlerApplication.UI
Added CodeDescriptions to Fiddler.CONFIG, updated visibility of some functions
Version 2.1.0.2 - Released 6/28/07.
Extensibility Improvements
Added IFiddlerExtension, IAutoTamper, and IHandleExecAction interfaces
List loaded Fiddler Extensions in Options dialog
Added FiddlerApplication object
Added oSession["log-drop-request-body"] and oSession["log-drop-response-body"]
Added bBufferResponse to Session object
Added UriScheme property to HTTPRequestHeaders & Parse it from request headers
See http://fiddler2.com/documentation/Extend-Fiddler/Interfaces
Improved HTTPS/Networking Support
New IPv6 options
Defaulted HTTPS-decryption to false
Added "Learn more" link for HTTPS support
Reloading secure traffic correctly reloads protocol
Added "Enable IPv6" to Tools > Fiddler Options
Added CaptureFTP Registry value and CONFIG.bCaptureFTP
Added CLR Version and Windows Version to Exception Reporting
Version 2.0.9.0 - Released 5/25/07.
Improved Inspectors (WebForms/Cookies/Hex/Etc)
Improved Save As WebTest
Support for HTTPS connection reuse and upstream HTTPS gateways
More explicit http errors on malformed response.
Various bugfixes
Version 2.0.8.8 - Released 4/12/07.
Improved WebTest Export code
Improved "Caching" inspector
Introduced /noattach command-line option
Added Session.ResetSessionCounter();
Rudimentary Session.Timer introduced
Added WinINETCache information to session Properties dialog
Version 2.0.8.7 - Released 3/11/07.
Fixed Image inspector to size correctly
Improved AutoFiddler support
Introduced SAZ file extension for ZipArchives
Fixed race condition in root certificate generation
Improved IPv6 support
Version 2.0.8.5 - Released 2/14/07.
Fixed "Simulate modem speeds" feature (request-trickle-delay, response-trickle-delay) for HTTPS traffic
Version 2.0.8.4 - Released 2/13/07.
Version 2.0.8.3 - Released 1/29/07.
Completed AutoResponder tab
Minor new features, bugfixes.
Version 2.0.8.1 - Released 1/16/07.
Version 2.0.8 - Released 11/25/06.
First public alpha
Version 2.0.7 - Released 11/10/06.
Version 2.0.4- Released 8/23/06.
Version 2.0.3 - Released 8/20/06.
Fixed hang when notifying of new version
Smooth scrolling of Session List
Tools | Fiddler Option to disable HTTPS decryption
Assorted bug fixes; code forked from Fiddler v1.2.0.7
Version 2.0.2 - Released 8/17/06.
Exception handling no longer crashes process
Fixed up CertMaker to set correct EKU
Added IgnoreServerCertErrors option
Disabled Server Cert revocation check
Version 2.0.1 - Released 8/16/06.
Updated release with significant improvements to stability.
Harmless (in Fiddler 1.2) exceptions now result in process termination if you acknowledge the Watson dialog (Apparently, an improvement in .NET 2.0. Later builds use a workaround).
Save the following as C:\program files\fiddler\fiddler.exe.config
<configuration>
<runtime>
<legacyUnhandledExceptionPolicy enabled="1" />
</runtime>
</configuration>
Version 2.0 - Released 8/9/06.
Initial Release