action

.action — ActionScript compiled class

Adobe Systems · 1998

Developer

Adobe Systems

Key Features

Contains compiled ActionScript bytecode for the AVM.
Enables interactive content, animations, and applications.
Primarily associated with Adobe Flash Player and Adobe AIR.
Offers object-oriented programming capabilities.

Best For

Executing pre-compiled ActionScript code within a Flash environment.
Providing interactive functionality for legacy web content.
Enabling complex animations and game logic for Flash-based projects.

Less Ideal For

Modern web development due to Flash deprecation.
Cross-platform compatibility outside of Flash/AIR runtimes.
Direct manipulation or editing without source code.
General purpose programming tasks.

Common Use Cases

Running interactive web animations and advertisements.
Powering client-side logic for Flash-based games.
Developing rich internet applications (RIAs) before HTML5.
Creating multimedia presentations and interactive kiosks.

How to Open It

On older systems, Adobe Flash Player (now deprecated and unsupported) might execute them.
Applications developed with Adobe AIR can also run .action files.
Modern browsers generally cannot directly execute .action files without plugins.
Decompilation tools can attempt to reverse-engineer the code into readable ActionScript.

What is a .action file?

ActionScript (.action) files are compiled bytecode for Adobe's ActionScript language, primarily used in Adobe Flash Player. These files contain the executable code that powers interactive elements, animations, and applications within Flash content. While Flash technology is largely deprecated due to security concerns and the rise of HTML5, .action files were once integral to web-based games, multimedia presentations, and rich internet applications. They store the logic and behavior that users interacted with in Flash Player environments.

Programs That Open .action Files

Platform	Program
Windows	Adobe Flash Player (Deprecated)	Free	Official
	Adobe AIR	Free	Official
macOS	Adobe Flash Player (Deprecated)	Free	Official
	Adobe AIR	Free	Official
Linux	Adobe Flash Player (Deprecated)	Free	Official
	Adobe AIR	Free	Official

Common Problems with .action Files

⚠️ .action files no longer run in modern browsers due to Flash deprecation.

Use a dedicated Flash Player emulator or decompile the file if you need to access its contents or logic.

⚠️ Cannot edit .action files directly.

You need the original ActionScript source code (.as files) or a decompiler to view and edit the logic.

Frequently Asked Questions

What is ActionScript?▼

ActionScript is an object-oriented programming language developed by Macromedia (later Adobe) for use with Flash.

Are .action files safe?▼

Historically, Flash content could be a vector for malware. While the technology is deprecated, caution is advised with .action files from unknown sources.

Can I convert .action files to something else?▼

You can decompile them to ActionScript source code. Converting them to other executable formats directly is generally not feasible or useful.

Technical Details

These files are compiled bytecode derived from the ActionScript programming language, which itself is ECMAScript-based. .action files are essentially machine code instructions tailored for the ActionScript Virtual Machine (AVM) embedded within Adobe Flash Player and Adobe AIR. They are not plain text and require specific runtime environments to be interpreted and executed.

Did You Know?

.action files are the compiled output of ActionScript, similar to how .class files are compiled Java code.

The deprecation of Flash Player in 2020 marked the end of widespread use for .action files.

Security Information

Due to the historical security vulnerabilities associated with Adobe Flash Player, it is recommended to exercise extreme caution when opening .action files from untrusted sources. Modern operating systems and browsers no longer support Flash, so running these files requires specialized, often outdated, software.