WadC (Wad Compiler) is an Integrated Development Environment and functional programming language for developing Doom-engine maps. It can be used to generate complex levels which can be saved in Doom's WAD format.

The IDE includes a text-editor component; a debug output pane and a 2D drawing pane which previews the current script's output. Also included is an experimental command line interface, wadccli.

An external nodes builder (such as glbsp) is required before the resulting WAD file can be played by a doom-engine.