A daily updated filename extension database!

LEX file extension

The table below provides useful information about the .lex file extension. It answers questions such as:

  • What is the .lex file?
  • What program do I need to open a .lex file?
  • How can the .lex file be opened, edited or printed?
  • How can I convert .lex files to another format?

We hope you find this page helpful and a valuable resource!

2 extension(s) and 0 alias(es) found in database

✅ Adobe InDesign Proximity Dictionary

LEX file is an Adobe InDesign Proximity Dictionary.
LEX format description not yet available
Category: Other files
Application: Adobe InDesign
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
LEX aliases:
LEX related links:
LEX related extensions:
Adobe InDesign Import Filter

Adobe InDesign Export Filter

Adobe InDesign Document

Adobe InDesign Interchange

Adobe InDesign Color Settings

Adobe InDesign Library

Adobe InDesign Template

Adobe InDesign User Dictionary

Adobe InDesign Book

Adobe InDesign Lock File

✅ Microsoft Office Custom Dictionary

LEX file is a Microsoft Office Dictionary data. A custom dictionary allows you to supplement the main dictionary with additional words, such as names, specialized technical terms, foreign words or alternative spelling of some words.
Category: Data files
Application: Microsoft Office Word
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
LEX aliases:
LEX related links:
LEX related extensions:
Microsoft Office Custom Dictionary

Microsoft Word Exclude Dictionary

Microsoft Office Personalized Menu

Microsoft Office AutoCorrect List

Other types of files may also use the .lex file extension.

🚫 The .lex file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

led, pex, elx, lfx, oex, lxe, lwx, le, kex, ex, mex, lx, lsx, les, lec

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

ProBoard Executable
Elixir DesignPro Tools Form
Land F/X Project
Luxology Modo 3D Scene
TurboWin LES Data
Liquid Studio Compiled Executable
Sony BBeB E-Book
Euphoria Source Code
MATLAB Executable

🔴 Can't open a .lex 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:


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 .lex 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 .lex file extension, write to us!

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