|Initial release||October 17, 2013|
|Engine||Trident v7.0, Chakra|
|Operating system||Windows 7 SP1|
Windows Server 2008 R2 SP1
Windows Server 2012
|Platform||IA-32, x64, and ARM|
|Included with||Windows 8.1|
Windows Server 2012 R2
Windows Server 2016
Windows Server 2019
|License||Proprietary, requires a Windows license|
Internet Explorer 11 (IE11) is the eleventh and final version of the Internet Explorer web browser by Microsoft. It was officially released on October 17, 2013, along with Windows 8.1 and on November 7, 2013 to Windows 7 users via Windows Update. It is the successor to Internet Explorer 10, released the previous year, and is the default browser for Windows 8.1 and Windows Server 2012 R2 operating systems. Windows Vista and earlier are not supported. The browser was also shipped with Windows 10 on its release on July 29, 2015, but Microsoft Edge is the default browser in that version of Windows, and there, Internet Explorer is configured to run websites based on legacy HTML technologies. It is the default browser shipped with Windows Server 2016 and Windows Server 2019.
Since January 12, 2016, only the most recent version of Internet Explorer offered for installation on any given Windows operating system is supported with security updates, lasting until the end of the support lifecycle for that Windows operating system. On Windows 7 and 8.1, only Internet Explorer 11 received security updates until the end of those Windows versions' support lifecycles. Internet Explorer 11 was made available for Windows Server 2012 and Windows Embedded 8 Standard in April 2019. It is the only supported version of Internet Explorer on these operating systems since January 31, 2020.
Internet Explorer 11 follows the OS component lifecycle, which means it remains supported with technical and security fixes while operating systems including it as a component are shipped. This means that there is no date for end of support for Internet Explorer 11. On August 17, 2020, Microsoft published a timeline indicating that the Microsoft Teams product would stop supporting Internet Explorer 11 on November 30, 2020, and Microsoft 365 products will end Internet Explorer 11 support on August 17, 2021.
document.all, meaning that code that checks for its presence will not detect it, but code that actually uses it will continue to work. Additionally, the
attachEventproprietary API has been removed.
In a November 2013 review by SitePoint, IE11 scored better than Google Chrome 30 and Firefox 26 in WebKit's SunSpider test and Google's WebGL test. It tied with Chrome for fastest in Microsoft's "fish aquarium" benchmark for WebGL and came last in Google's V8 performance benchmark. As a result of the speed improvements, the reviewer said "if you switched to Chrome for speed alone, you're now using the wrong browser." IE11 was also observed to use less memory with multiple tabs open than contemporary versions of Chrome and Firefox.
In August 2015, SitePoint again benchmarked IE11 in its review for Microsoft Edge, where Edge 12, Chrome 44 and Firefox 39 were also present. IE11 came last in Apple's JetStream test (which replaced SunSpider) and Google's Octane test (which replaces V8) but it came second in Microsoft's "fish aquarium" test, after Edge.
Though an internal build of IE11 was leaked on March 25, 2013, its first preview version was not formally released until June 2013, during the Build 2013 conference, along with the preview release of Windows Server 2012 R2 and Windows 8.1. On July 25, 2013, Microsoft released the developer preview of Internet Explorer 11 for Windows 7 and Windows Server 2008 R2.
|Name||Version||Release date||Works on||New features|
|July 25, 2013||Windows 7 and Windows Server 2008 R2|
|Old version, no longer maintained: Release Preview||Old version, no longer maintained: 11.0.9600.16384||September 17, 2013||Windows 7 and Windows Server 2008 R2||Performance improvements|
|Current stable version: Internet Explorer 11||Current stable version: 11.0.9600.20045||October 17, 2013||Windows 7, Windows 8.1, Windows Server 2008 R2, Windows Server 2012 and Windows Server 2012 R2||Update Versions: 11.0.240 (KB5003636)|
|Current stable version: Internet Explorer 11||Current stable version: 11.0.10240.19003||July 29, 2015||Windows 10, Windows Server 2016 and Windows Server 2019||Released in Windows 10. Microsoft Edge is the default browser from Microsoft in this version of Windows. Internet Explorer is set up to run websites, based on legacy HTML technologies, which are not, or improperly, supported in Microsoft Edge.|
|Internet Explorer 11 (Version 1803)||11.0.17134.2208||April 30, 2018||Windows 10 (Spring Creators Update)||Update Version: 11.0.126 (KB4505050)|
|Internet Explorer 11 (Version 1903)||11.0.18362.1256||May 21, 2019||Windows 10 (May Update)||Released in Windows 10 update KB4516046|
|Internet Explorer 11 (Version 20H2)||11.0.19042.1110||October 20, 2020||Windows 10 (October 2020 Update)||Released in Windows 10 update KB4586768|
While there were no other releases of Internet Explorer, an update for Windows 7 and 8.1 was released on April 2, 2014 which added Enterprise Mode, improved developer tools, improved support for WebGL and ECMAScript 5.1.
With the release of Windows 11, Internet Explorer is no longer preinstalled on any new devices. Microsoft Edge is the only preinstalled browser in the operating system. An Internet Explorer mode is however provided in Microsoft Edge to run legacy websites.