L2 JPEXS FFDec

A free L2 adaptation of JPEXS Free Flash Decompiler. It opens GFX movies right inside encrypted UGX packages and fully recompiles ActionScript 3, so your edits run in the L2 client.

Key features

• GFX inside UGXOpens GFX movies right inside encrypted UGX packages with no unpacking step.
• Full AS3 recompilationActionScript 3 is compiled in full, and your changes run in the L2 client.
• Portable version with its own JavaUnpack the archive and run it: nothing to install. L2FFDecCmd.exe for the command line and AI assistants sits next to it.
• Console and JSONOptions are checked for each command, mistyped ones get a hint, --json prints one result per line, and edits are made only with --in-place (with a dated .bak copy), --out or --dry-run.
• AI assistants through MCPAn MCP server with ffdec_* tools, a read-only mode and install-mcp / install-skill commands for Claude, Codex and others.
• Trusted signatureThe program and installer are digitally signed, so Windows shows a verified publisher.

Platform

Universal: GFX, UGX / SWF. Portable version.

How to get it

Developed by the L2Tools team. Presented by the L2-Scripts studio in cooperation with L2Tools.