Opening a LESS File

The LESS file type is primarily associated with Less.

LESS	File extension: LESS
	File type:	style sheet generation script

What is a LESS file?

LESS files mostly belong to Less by Less Developers. A LESS file is a script written in the Leaner Style Sheets (Less) syntax for generating Cascading Style Sheets (CSS). Less is a Cascading Style Sheets preprocessor similar to SCSS/SASS. It provides a shorter more extensive syntax for writing CSS. For example, a developer needs only prefix a variable with "@" (e.g. color: @red-medium) instead of using the var(--red-medium) syntax when accessing it. Less features include, mixins/functions, variables, loops, at-rules, arithmetic, maps, functions, namespaces, scope, and stylesheet importing directives. Less library compiles a LESS file to CSS which can be imported into an HTML web page.

How to open a LESS file

You need a suitable software like Less to open a LESS 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 LESS file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a LESS file directly in the browser:. Just drag the file onto this browser window and drop it.

Online LESS Text Viewer

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Programs that open and convert LESS files:

Less by Less Developers
See the previous paragraphs to learn more about the main application. LESS files are often referred to as Less web (source)s because this type of file is primarily created or used by this software.
Visual Studio Code (style sheet generation script) by Microsoft
Visual Studio Code is a source code editor with support for third-party Less CSS preprocessor extensions. It can create/edit LESS stylesheets and compile them to CSS stylesheets. This file format is classified as Web (source).

Technical Data for LESS File Extension

File classification:

Web (source)

Related files:

js, css, psc

Mime type:

text/x-less, text/css

a less style sheet generation script is a special file format by Less Developers and should only be edited and saved with the appropriate software.

How to solve problems with LESS files

Associate the LESS file extension with the correct application.
Update your software that should actually open style sheet generation scripts. Because only the current version supports the latest LESS file format. Search, therefore, e.g. on the Less Developers manufacturer website after an available Less update.
To make sure that your LESS file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
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