LMU File

What are LMU files and how to open them

Are you having problems opening a LMU file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your LMU files.

What is a LMU file?

LMU files have multiple uses, and RPG Maker 2000/2003 Map is one of them. Read more about the other uses further down the page.

RPG Maker 2000/2003 Map

RPG Maker 2000/2003 Map files with extension .LMU store the layout of a single map used in a 2D role-playing game project built with RPG Maker 2000 or RPG Maker 2003. A map file holds all the data needed to reconstruct the game world's terrain tiles, the selected tileset (known as the ChipSet), the map's dimensions, and embedded event objects like interactive NPCs, triggers, or special terrain effects. When you browse a game project, a map called something like Map0001.lmu corresponds to one of the game's physical areas (towns, dungeons, outdoors).

These files are generated by RPG Maker 2000 or 2003 when the map is saved in the game editor. Changes you make in the editor - adjusting map width or height (in tiles), selecting which ChipSet image is used, placing terrain tiles for each layer, and programming events - are all recorded in the LMU file. At runtime the game engine reads the file to display the map, determine character movement and collisions, and handle any events. Map tree data (which map goes where, what background music plays, etc.) is kept in a separate file, RPG_RT.lmt.

Technically the file begins with a header string to identify it: a length byte (commonly 0x0A) followed by ASCII "LcfMapUnit", which marks it as the LMU map-data format.

How to open LMU files

We have identified one LMU opener that is compatible with this specific type of LMU file.

Programs that open RPG Maker 2000/2003 Map files

Last updated: August 7, 2026

All known file formats using extension .LMU

While RPG Maker 2000/2003 Map is a popular type of LMU-file, we know of 2 different uses of the .LMU file extension. Different software may use files with the same extension for different types of data.

Sony PictureGear Studio PrintStudio Document

We know that one LMU format is Sony PictureGear Studio PrintStudio Document. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

While we have not verified the app ourselves yet, our users have suggested a single LMU opener which you will find listed below.

Various apps that use files with this extension

These apps are known to open certain types of LMU files. Remember, different programs may use LMU files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about LMU file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.