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.

• Official releases
• Last builds

• Microsoft Windows .NET 4.8 application for 7, 8.1 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 2019 (Community version is free),
• Click the solution and select "Release|x86" or "Release|x64" from "Active config" in Properties panel,
• Build the entire solution, the built binary will run in standalone mode

• Read the contribution notes from the CONTRIBUTING.md file.