LESS Formatter – Validation and Formatting Hub

Tidy LESS files containing mixins, variables, and nested selectors with a flexible Prettier-powered workflow.

Input

Formatted Output

Formatting Options

Line width

Indent width

Use tabsEnable

Use single quotesEnable

Examples

Variables and nesting

@primary-color:#007bff;.button{background:@primary-color;&:hover{background:darken(@primary-color,10...

How does the LESS Formatter work?

Your LESS source is parsed into an AST that understands variables, mixins, guards, and nested selectors. The tree is then rewritten with the formatting settings you supply.

Selectors that rely on the ampersand (`&`), media queries, and guarded mixins keep their semantics but are aligned for clarity, even in large codebases.

What is LESS?

LESS (Leaner Style Sheets) extends CSS with variables, mixins, functions, and calculations. It keeps design systems modular but can inflate file complexity over time.

Maintaining clean formatting ensures that teams can collaborate confidently and evolve styling logic without fear of breaking shared foundations.

Where should you use this formatter?

Adopt it for LESS-driven Bootstrap forks, brand theme systems, or enterprise dashboards where multiple contributors touch the same files.

Integrate it into CI or pre-commit hooks to enforce formatting before code lands in your repository.

Frequently Asked Questions

Will LESS calculations break after formatting?

No. The parser preserves expressions and only adjusts spacing, so arithmetic and function outputs remain untouched.

Does formatting alter variable scope?

Scope stays exactly the same. The formatter merely normalizes layout and never rewrites the logic that determines variable visibility.

Loading tool…

LESS Formatter – Professional Mixin-Friendly Beautifier

Tidy LESS files containing mixins, variables, and nested selectors with a flexible Prettier-powered workflow.

The LESS Formatter taps into Prettier's PostCSS parser to normalize `.less` files full of variables, mixin calls, and nested selectors. It clarifies hierarchy, trims noisy whitespace, and aligns your code with team standards to reduce Git diffs and review friction. Configurable line width, tab width, tabs, and quote style make it easy to mirror established conventions. When syntax issues appear, descriptive errors pinpoint the exact line so production pipelines stay fast and calm.

Keywords

#less formatter#format less#less beautifier#prettier less#less code style#css preprocessor formatting

Looking for more? Explore other Formatters tools

LESS Formatter – Professional Mixin-Friendly Beautifier