Flasm is a free command line assembler/disassembler of Flash ActionScript bytecode. It lets you make changes to any SWF. Flasm fully supports SWFs produced by Macromedia Flash 8 and earlier Flash versions. About · Download · What's new · Usage · Flash virtual machine · Assembler syntax · Embedding Flasm · Optimization techniques · __bytecode__ · File size difference · Huge scripts · Quirks, bugs a