SLEF file extension
The table below provides useful information about the .slef file extension. It answers questions such as:
- What is the .slef file?
- What program do I need to open a .slef file?
- How can the .slef file be opened, edited or printed?
- How can I convert .slef files to another format?
Table of Contents
- ✅ Spectral Library Exchange Format Data
- 🔄 .slef file converters
- 🚫 .slef file related errors
We hope you find this page helpful and a valuable resource!
1 extension(s) and 0 alias(es) found in database
✅ Spectral Library Exchange Format Data

SLEF file is a Spectral Library Exchange Format Data. The SLEF is a format that was developed by a number of intelligence agencies that were dealing with spectral signature data and wanted a common way to store not just signature data, but also metadata (classification, who collected it, details about material, where it was collected, when it was collected, etc.).
Other types of files may also use the .slef file extension.
🚫 The .slef file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
Is it possible that the filename extension is misspelled?
We found the following similar file extensions in our database:
🔴 Can't open a .slef file?
When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:
Windows cannot open this file:
example.slef
To open this file, Windows needs to know what program you want to use to open it...
If you don't know how to set the .slef file association, check the FAQ.
🔴 Can I change the extension of files?
Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.
If you have helpful information about the .slef file extension, write to us!