Online Flex Compiler
Write Flex in the browser and run it on our machines. The editor is opening.
Free online Flex compiler and editor
JDoodle is an online IDE that has served the programming community since 2013. You write, compile, and run code in the browser for Flex and many other languages, without installing a toolchain.
What you see on this page is JDoodle’s free Flex compiler. Write Flex in the editor, press Execute, and JDoodle runs it on its servers. You do not install Flex, and you do not need a JDoodle account to run code.
Online Flex editor
JDoodle’s Flex editor on this page highlights syntax, completes as you type, matches brackets, and folds blocks. It is an online Flex editor and a compiler together: you write here, then Execute runs your program on JDoodle’s servers.
Flex versions on JDoodle
JDoodle runs Flex 2.6.4.
Frequently asked questions
Is JDoodle’s online Flex compiler free?
Yes. JDoodle lets you write and run Flex without paying. A JDoodle account is only needed to save projects, use more AI credits, or unlock faster workspaces.
Do I need to install Flex to use JDoodle?
No. JDoodle runs Flex on its servers. Open this page in a browser and execute.
Is this an online Flex editor or a compiler?
Both. The page is an online Flex editor and it compiles and runs what you write.
Input, interactive runs, files, and the rest of the editor work the same on every language. See the JDoodle IDE documentation.