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0 characters · 0 bytes Formatting and minifying happen locally in your browser — nothing is uploaded.

CSS Formatter & Minifier — Free Online Tool

Clean up messy CSS into readable, properly indented code — or shrink it down to the smallest valid form for production. One click, instant results.

Your formatted or minified CSS will appear here after you click Format or Minify.
Instant results — no waiting
No sign-up needed
Free forever

How it works

1Paste your CSS into the box above — or tap Load sample to try it.
2Press Format for clean readable code, or Minify to shrink it for production.
3Check the before/after sizes, then copy your result with one tap.

Frequently asked questions

Does formatting or minifying change how my CSS works?

No. Formatting only changes whitespace and indentation, and minifying removes comments and unneeded whitespace — every rule, value and selector stays exactly the same, so your styles render identically.

How much smaller can minifying make my CSS?

Most stylesheets shrink by 20–40%. The tool removes comments, collapses whitespace and drops the last semicolon in each block, while safely keeping spaces inside strings and calc() expressions intact.

Is my CSS uploaded to a server?

No. Formatting and minifying run entirely in your browser (the formatter library loads once from a public CDN). Your CSS never leaves this page — nothing is uploaded or stored anywhere.

js-beautify formatting · string-safe minification · 100% local — your CSS never leaves this page.