CSS Tools

CSS Shorthand Converter

Convert longhand CSS into clean shorthand automatically (margin, padding, border, background, animation, font, flex, gap, columns, scroll-padding and more). Runs in your browser — no server processing.

Fast No tracking AST-based

Input CSS

Output CSS

Why use CSS shorthands?

Shorthands reduce repetition and help you keep stylesheets readable and maintainable — especially in design systems and component libraries.

  • Cleaner diffs in Git
  • Fewer declarations per rule
  • Consistent spacing/typography patterns

Quick examples

margin-top: 16px;
margin-right: 24px;
margin-bottom: 16px;
margin-left: 24px;

/* becomes */
margin: 16px 24px;

Works great for: margin / padding / border / background / animation / font / flex / gap / columns / scroll-padding.

FAQ

What shorthands does this tool support?
Broad shorthand coverage: The tool converts common longhand groups such as margin, padding, border, outline, background, animation, font, layout-related shorthands like flex, flex-flow, gap, columns, column-rule, and scrolling shorthands such as scroll-margin and scroll-padding, when it is safe to do so.
Will this change the meaning of my CSS?
Behavior-safe by design: Conversions are conservative and AST-based. If merging longhand properties could change rendering (for example, multi-layer backgrounds or multiple animation definitions), the tool will skip that conversion. You should always review the output before using it in production.
Does my CSS get uploaded?
No data leaves your browser: All parsing and conversion happens locally in your browser using JavaScript. Your CSS is never sent to a server or stored anywhere.
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