FlashDevelop is a free and open source code editor.
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FlashDevelop is a free and open source (MIT license) source code editor.


FlashDevelop offers first class support for Flash ActionScript (2 and 3) and Haxe development: great and fast code completion & code generation, projects compilation & Flash debugging, plenty of project templates, SWF/SWC exploration, etc.

FlashDevelop is more generally a great web developer IDE with integrated source-control support (svn, git, mercurial), tasks/todo, snippets, XML/HTML/CSS completion and built-in zen-coding for HTML.



  • Microsoft Windows .NET 4.0 application for XP, Vista, 7, 8 and 10
  • Mac OSX/Linux compatible using virtualization software or Wine/CrossOver
  • Native (Qt) Mac OSX/Linux helper is available to improve OS integration


  • Open in Visual Studio 2017 (Community version is free),
  • Click the solution and select "Release|x86" from "Active config" in Properties panel,
  • Build the entire solution, the built binary will run in standalone mode