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?
Table of Contents
We hope you find this page helpful and a valuable resource!
5 extension(s) and 0 alias(es) found in database
✅ Adobe InDesign Proximity Dictionary

The LEX file is an Adobe InDesign Proximity Dictionary.
✅ Microsoft Office Custom Dictionary

The 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.
✅ SmartWare Dictionary Data

The LEX file is a SmartWare Dictionary Data. SmartWare is a programming platform. SmartWare also includes a word processor, spreadsheet, and communication modules.
✅ Lex Data

The LEX file is a Lex Data. Lex is a computer program that generates lexical analyzers.
✅ HP-71 Basic Extension

The LEX file is a HP-71 Basic Extension. The HP-71 was a small handheld computer/calculator featuring both QWERTY and calculator/numeric keypads.
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:
Is it possible that the filename extension is misspelled?
We found the following similar file extensions in our database:
🔴 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:
example.lex
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!