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LESS to CSS Converter

Compile LESS to plain CSS with the real compiler — variables, mixins and nesting.

Converters Reviews Free · no sign-up

Drop a .less file here, or click to choose one

Converted on your device — the file is never uploaded

CSS

Quick Tool Overview

The LESS to CSS Converter compiles LESS with the official compiler — variables, mixins, nesting, guards and colour functions included — and hands back plain CSS, readable or minified.

What it does
Compiles LESS into plain CSS
You give it
LESS source or a .less file
You get back
CSS, readable or minified
Best for
Older themes and Bootstrap 3 projects
Converters Free, unlimited use No sign-up Runs in your browser

About the LESS to CSS Converter

LESS built a generation of themes, Bootstrap 3 among them, and plenty of that code is still in production. Touching it means compiling it, and setting up Node and a build for one stylesheet you need to read is a poor use of an afternoon.

Paste LESS and get CSS, compiled by LESS itself — version 4.2 — rather than by an approximation. Variables, mixins with arguments and defaults, nesting, the parent selector, guards, operations and the colour functions such as darken() and lighten() all behave exactly as they do in a build. Choose the division behaviour to suit LESS 3 or LESS 4 code, and minify on the way out. The compiler runs in your browser, so a proprietary theme never leaves your machine.

Key features of the LESS to CSS Converter

The real compiler

LESS 4.2 itself, so the output matches what a build produces.

Mixins and guards

Parametric mixins, defaults, guards and detached rulesets all work.

Colour functions

darken(), lighten(), fade() and the rest resolve to real values.

Both division rules

LESS 4 bracket division, or the classic always-divide behaviour.

Errors that locate themselves

A failure names the line and column the compiler stopped at.

How to use the LESS to CSS Converter

  1. 1

    Paste or drop your LESS

    A stylesheet, a theme file, or a single component.

  2. 2

    Choose the division rule

    LESS 4 divides only inside brackets; older code often relies on always.

  3. 3

    Compile

    Errors name the line and column, exactly as the compiler reports them.

  4. 4

    Copy or download the CSS

    Minified or readable, whichever you need.

Frequently asked questions

No, because there is no file system here to import from. Paste the imported LESS into the same box, or compile locally where the files exist.

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