SCSS to LESS Converter Online — Free Tool

Migration usually happens when a SCSS-authored component needs to live inside a LESS project — Bootstrap 3 themes, legacy ASP.NET / Sitecore codebases, or any design system that ships LESS source. The OpenFormatter SCSS to LESS converter runs in JavaScript on your machine, so internal brand tokens stay private.

How to convert SCSS to LESS — 4 steps

1. Paste your SCSS. Include $variables, mixins, and nested rules. Click Load Sample for a button-component example.
2. Click Convert. Every $name reference becomes @name, and mixin syntax is adjusted for the LESS compiler.
3. Inspect the output. The Output panel shows LESS-ready source. Review @variables, mixin calls, and any flagged @extend usage.
4. Compile with lessc. Save the result as .less and run it through your LESS build pipeline (lessc, gulp-less, or webpack less-loader) to produce CSS.

SCSS in, LESS out — example

$primary: #2563eb;
$radius: 8px;

.button {
  background: $primary;
  border-radius: $radius;

  &:hover {
    background: darken($primary, 10%);
  }
}

@primary: #2563eb;
@radius: 8px;

.button {
  background: @primary;
  border-radius: @radius;

  &:hover {
    background: darken(@primary, 10%);
  }
}

Common use cases

• check_circleAdapting a SCSS-authored component for a Bootstrap 3 theme written in LESS
• check_circleMigrating a legacy ASP.NET, Sitecore, or Drupal project from SCSS to a LESS build pipeline
• check_circleSharing a stylesheet with a team that standardised on the LESS compiler
• check_circleIntegrating SCSS snippets from a design system into a LESS-based corporate codebase
• check_circleConverting SCSS examples in documentation to LESS for a LESS-only intranet
• check_circleProducing a LESS variant of a component library to ship alongside the SCSS version
• check_circleAuditing variable usage by switching the sigil and recompiling to spot undefined names
• check_circleOnboarding a developer used to LESS into a SCSS codebase by translating reference files

SCSS vs LESS — what changes, what stays

The two preprocessors are siblings, not strangers. Variables change sigil — $primary becomes @primary. Mixins change form — @mixin name { ... } with @include name(args) becomes a class selector with parentheses, called by writing the class name. Nesting, the & parent reference, comments, and most colour functions (darken, lighten, fade) are identical and pass through unchanged. Advanced features — SCSS placeholders, @each / @for loops with map iteration, modern @use modules — have no direct LESS equivalent and need manual review after conversion.