MAXScript code can be found in several different "types" of files, with the extension indicating what sort of file it is, or how it is handled by 3ds Max.
Supported MAXScript extensions are:
| Extension | Description |
|---|---|
| .mxs | A MAXScript script file, recognized by the Script Editor, but not loaded at startup. |
| .ms | A MAXScript script file, recognized by the Script Editor, and loaded at startup if saved in one of the startup script locations. |
| .mcr | A MAXScript macro script. |
| .mse | A MAXScript script file, encrypted to protect its contents using the encryptScript command, and loaded at startup if saved in one of the startup script locations. |
| .mzp | A MAXScript zip file package. |