SWF Decompiler Online
Decompile Flash SWF files to ActionScript source code and project resources.
How It Works
Upload
Drag and drop your .swf file or click to browse.
Decompile
FFDec extracts ActionScript code and all resources.
Browse
Explore scripts, images, sounds, and shapes online.
What is a SWF File?
SWF (originally "Shockwave Flash", later "Small Web Format") is the file format created by Macromedia (later Adobe) for Flash multimedia content. For over two decades, SWF was the dominant format for web animations, interactive content, browser games, and rich internet applications.
A SWF file is a compact binary format that contains:
- ActionScript code — the programming logic (ActionScript 2 or ActionScript 3)
- Vector graphics — scalable shapes, paths, and fills
- Bitmap images — JPEG, PNG, and GIF assets
- Audio — MP3, ADPCM, and other compressed audio streams
- Fonts — embedded font definitions for text rendering
- Timeline — frame-by-frame animation structure with movie clips and sprites
Flash After End of Life
Adobe officially ended Flash Player support on December 31, 2020. However, the SWF file format remains important for several reasons:
- Digital preservation — projects like Flashpoint and the Internet Archive preserve hundreds of thousands of Flash games and animations
- Legacy applications — many enterprises still maintain internal Flash-based tools and training materials
- Asset recovery — extracting artwork, audio, and code from old Flash projects for migration to modern platforms
- Historical significance — Flash was a pivotal technology in web history and its content has cultural value
ActionScript 2 vs ActionScript 3
SWF files may contain either ActionScript 2 (AS2) or ActionScript 3 (AS3) code, which are fundamentally different:
- ActionScript 2 — prototype-based, loosely typed, runs on the AVM1 (ActionScript Virtual Machine 1). Common in older Flash content and simple animations.
- ActionScript 3 — class-based, strongly typed, runs on the AVM2. Used in newer Flash content, games, and complex applications. Compiles to ABC (ActionScript Bytecode).
This decompiler handles both AS2 and AS3 content, producing readable source code from either bytecode format.
Frequently Asked Questions
What is a SWF file?
SWF is the file format for Adobe Flash multimedia content. SWF files contain vector graphics, animations, ActionScript code, audio, and video. Although Flash Player was discontinued in 2020, millions of SWF files still exist in archives.
Can I still decompile SWF files?
Yes. SWF decompilation does not require Flash Player. This tool reads the SWF binary format directly and extracts ActionScript code, images, sounds, and other assets using FFDec.
What can be extracted from a SWF file?
ActionScript 2 or 3 source code, vector shapes, bitmap images, audio files, fonts, video clips, and the timeline structure. The decompiler reconstructs a project structure similar to the original FLA file.