All about LES Files

The LES file type is primarily associated with Level Editor.

LES	File extension: LES
	File type:	game data file

What is a LES file?

LES files mostly belong to Level Editor. LES files are data files whose function depends on the software that created them.
They are used for several specific purposes:

Game Data: Many LES files act as level editor files. They may store scripts, stage settings, or graphics data. This format is seen in titles like IL-2 Sturmovik and games from Sierra Entertainment, and even in resources used in games such as Cossacks. Some files are called a Level Editor Script file or a game level file.

Lesson Content: In some cases, these files hold lesson plans or structured course data for educational software and LMS systems. They are often labeled as a Lesson file or LMS lesson plan.

Research Data: A few LES files are used in bioinformatics. For instance, they can contain TCGA RNA-Seq data. More details can be found at the TCGA portal.

FilExt.com note: If you want to open or view a LES file, use the specific level editor, course management tool, or research software that originally created it. A plain text editor may show some data if the file is text-based, but it might not display all structured information correctly.

How to open LES files

You need a suitable software like Level Editor to open a LES file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your LES file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a LES file directly in the browser:. Just drag the file onto this browser window and drop it.

Online LES Text Viewer

Choose your .les file to analyze

or drag and drop it here

Online File Viewer

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LES file format details:

Why is it important to know the file format? This is the only way to find out which program to use to open the file. Often, the file format can be deduced from the file extension or the initial bytes (called the signature). However, different programs can use the same file extension, and file extensions can be assigned incorrectly. So you need a detailed analysis of a file to find out the format and the associated program. Below you will find our evaluation of the LES files:

LES is not a common file extension and has no uniform or dominant file format. The following file formats are most commonly found in LES files:

• 10% of all LES files start with the bytes 6F 00 52 00 14 00 98 00 7C, which are crucial for this file format. The contents of these files cannot be read by a human; only a computer program can interpret the data. The files are 25 KB to 25 KB in size, with a median of 25 KB. The following filename is common: TCGA-AO-A0J9-S2-1.les. Files like these have the following tags: tcga.
• 10% of all LES files start with the magic bytes 01 00 00 00, which are always the first bytes of this file format. The content consists of illegible binary data, which can only be read and interpreted by the associated programs. LES files are between 320 KB and 2 MB in size. The file name Editor.les is typical for these files.

All other LES files (80%) have different formats, the following 6 formats exist: Microsoft Lesson/tutorial, LES and kYV. They are often associated with tutor or lesson. You can get all the details of your LES file by dragging it onto this page or by clicking the button "Choose your .les file to analyze" above.