Flex SDK

Overview

Flex is a highly productive, open source framework for building and maintaining expressive web applications that deploy consistently on all major browsers, desktops and operating systems.

This site is focused on the development of the Flex SDK. If you are looking for more information on how to use Flex, you may wish to visit the Flex Developer Center.

Flex 3 is the latest production quality release.
Gumbo (Flex 4) is currently under development.

More information

Download

Flex SDK version 3.4.0.9271 is the latest production quality release.

Flex 4 Beta 2 Milestone build 4.0.0.10485 is now available.

Please review the Downloads page for an explanation of the different downloads available.

Adobe also offers these Flex-related products:

Free Adobe Flex SDK (Download)
Adobe Flex Builder (Download)

‍ More downloads

Getting Involved

There are many ways to contribute to Flex:

‍ More information

Announcements

10/12/09
Flex SDK 4 beta 2 available for download
We're excited to announce that the second Flex 4 SDK beta 2 is now available for download! Check out ...
(more)

08/19/09
Flex SDK 3.4 Released and Security Update
Flex SDK version 3.4, the latest production quality release, has been released. You can download...
(more)

06/17/09
Share your experience at the Open Beta Meetings
We hope you've had a chance to get your hands dirty with the Flex 4 and Flash Builder 4 betas.
(more)

06/01/09
Flex 4 SDK Beta is here!
We're excited to announce that Flex 4 SDK beta (previously code named Gumbo) is now available!
(more)

News and Blogs

Bugs and Feature Requests

jiraissues: Error on line 56: The element type "link" must be terminated by the matching end-tag "</link>". <a href='/wiki/download/temp/rssoutput-1300710529.txt'>rssoutput-1300710529.txt</a>

Upcoming Milestones

  • Flex 3.4 has been released.
  • Gumbo (Flex 4) Beta 1 is is available.
  • Flex 4 Beta 2 is expected in late 2009.
  • Flex 4.0 is expected in early 2010.