LES Converter

Extract text from Lesson and game files (LES)

Select File
Drop or upload your .LES file

Online File Converter

✈

How to extract text from your LES file

Click the "Select File" button above, and choose your LES file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.

Convert LES to another file type

To convert LES Lesson files to another format, you need Bentley STAAD.Pro or other Data software.

Convert a file to LES

To convert other file formats to the "Lesson Data File" file type, you need software like Bentley STAAD.Pro or a similar tool.

About LES files

The .LES file extension is a classic example of a "container collision," where multiple unrelated software ecosystems use the same abbreviation for different purposes. Most commonly, users encounter this format as a Lesson File associated with engineering software like Bentley STAAD.Pro or educational tools like VTech, where the file contains structured tutorials, structural analysis definitions, or lesson plans. These files are typically proprietary and binary, meaning they cannot be opened by standard text editors, forcing users to rely on expensive, niche software just to view the content.

Alternatively, in the gaming world (specifically for titles like IL-2 Sturmovik and Cossacks), a .LES file acts as a resource archive or object script. Here, the friction is different: modders often need to access the textures or logic scripts locked inside these archives, but the file looks like gibberish without specific extraction tools. The proprietary nature of these formats effectively locks your data away, making sharing or archiving difficult.

Best Conversion Targets:

For Documentation: If your file is a lesson plan or engineering tutorial, convert it to PDF. This ensures the instructions can be viewed on any device without needing a Bentley license.
For Modding/Editing: If dealing with game scripts, converting or renaming to TXT allows you to inspect the code. For game archives, treating the file as a container and converting to ZIP can sometimes allow for asset extraction.
For Archiving: To ensure long-term access to lesson data without version compatibility issues, convert to PDF/A or standard XML if the structure permits.

Convert.Guru analyzes your LES file, detects the exact format, and lets you read the text inside.

Users also converted LEVEL, BLC and LEV files.

FAQ

If you want to convert LES file to CSV, JSON, XML, YAML, YML, TOML, INI, CFG, CONF, DAT, DB or SQL, you can use Bentley STAAD.Pro or similar software from the "Lesson or Game Data Container" category. In the File menu, look for Save As… or Export….

To convert DBF, XML, SQLITE, XLSX, SQL, TSV, ACCDB, YAML, MDB, CSV, ODS or JSON files to LES, try Bentley STAAD.Pro or another comparable tool in the "Lesson or Game Data Container" category.

The LES Converter Story

The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our LES converter.