Flex 4 Downloads

Look here for a description regarding the types of SDKs available.

Look here for an explanation of the different build types found on this page.

Look here for an explanation of how to use a stable or nightly build in Flex Builder.

Latest Milestone Release Builds

Milestone Build Build Date Adobe Flex SDK Open Source Flex SDK Adobe Add-ons
Flex 4.1A 4.1.0.16076A Thu June 30, 2010 Download (ZIP, 169MB) Download (ZIP, 65MB) Download (ZIP, 76MB)
Flex 4.0A 4.0.0.14159A Sun Mar 21 2010 Download (ZIP, 138MB) Download (ZIP, 98MB) Download (ZIP, 40MB)

Stable Builds

Build Build Date Adobe Flex SDK Open Source Flex SDK Adobe Add-ons

Nightly Builds

Build Changes Build Date Adobe Flex SDK Open Source Flex SDK Adobe Add-ons Language Reference