Decomp.wtf

Decomp.wtf is a free open source app that uses an AI agent to turn game ROMs back into C code byte for byte.

Decomp.wtf is a local open-source application designed to decompile game ROMs and disc images back into C or C++ code using AI agents. Users point an existing agent like Claude Code or Codex at a game file for platforms including Nintendo 64, PlayStation 1 and 2, GameCube, Wii, Game Boy Advance, and DS. The app splits the game into functions, provides machine-made drafts, and uses compilers to test every attempt byte for byte against the original binary. Multiple agents can work in parallel, sharing structures and progress while all data stays on the user's computer. It also supports continuing community decomps from decomp.dev by cloning repositories and integrating with local compilers and objdiff. Finished functions can be linked back into the game project and exported as source code.

Decomp.wtf at a glance

Best for: Software engineer
Runs on: Web, macOS, Windows, Linux, CLI, self-hosted, open source
Pricing: Free and open source application; users provide their own AI agent subscription or API credits.
Released: October 2026
Category: AI coding tool
Website: decomp.wtf

Key features

Byte-identical function verification
Support for multiple AI agents
Local execution with no data uploaded
Integration with public community decomps
Live visual progress mapping
Automatic function splitting for multiple ROM formats

Use it for

Decompiling game ROMs back into original C or C++ source code
Continuing public community decompilation projects from decomp.dev
Modding and porting classic console games
Running multiple AI coding agents in parallel to match game functions

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