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Page Utils

CSS Formatter

CSS Formatter pretty-prints or minifies CSS in your browser. Paste a stylesheet or CSS fragment, format it locally with a client-side CSS beautifier (Prettier CSS / PostCSS path or equivalent), then copy two-space indented or compact output. Nothing is uploaded, stored in localStorage, or sent to a remote formatter API. Broken CSS that the formatter cannot parse is rejected next to the input rather than silently mangled.

Paste a CSS stylesheet or fragment and format it locally — pretty-print with consistent indentation for reading and review, or minify to a compact line. Closing the tab drops the workspace; we do not write it to localStorage or send it to a formatter API. This page is a CSS beautifier / pretty-printer for text you already have, not a Sass/Less compiler and not a live browser inspector.

Formatting runs in the browser with a client-side CSS formatter (Prettier standalone + CSS/PostCSS plugin, or the same class of local library CoS resolves from npm at install). If the text cannot be parsed as CSS, the page shows an error next to the input instead of guessing at a fix. Selectors, properties, and values are preserved as written; this page reflows whitespace and indentation, it does not rewrite your design tokens or invent vendor prefixes.

CSS workspace

Pretty

Paste plain CSS. Whitespace and indentation only — Sass/Less is not compiled and @import URLs are not fetched. Nothing is uploaded.

Output

Whitespace formatter only — no Sass/Less compilation, Autoprefixer, or @import fetching. Closing the tab drops the workspace.

How does the CSS Formatter work?

  1. 1. Paste CSS

    Drop in a stylesheet or CSS fragment. Load example fills a tiny fictional .card block.

  2. 2. Format locally

    The browser runs a client-side CSS beautifier (Prettier CSS path or equivalent) in this tab. Nothing is uploaded and no @import URLs are fetched.

  3. 3. Pretty-print or minify

    Choose indented output for reading and review, or a compact form for pasting into a tight config field. Selectors and values stay as written; only whitespace and indentation change.

  4. 4. Copy the result

    Copy the formatted CSS. Closing the tab drops the workspace. Need XML, SQL, or JSON instead? Use the other Developer formatters on this hub.

Questions about CSS Formatter

What does this CSS formatter do?
It pretty-prints (beautifies) or minifies CSS in your browser. Paste a stylesheet or fragment, and it reformats whitespace and indentation so rules are easy to read — or collapses them for a compact paste. It is a local CSS beautifier, not a Sass compiler and not a live DevTools inspector.
Does it upload my CSS?
No. Formatting runs entirely in this tab. There is no account, no server-side formatter, and no file upload. The text you paste stays here until you clear it or close the page. We do not write it to localStorage. That is the same privacy rule as XML Formatter, SQL Formatter, and JSON Formatter on this hub.
Why is the page called CSS Formatter if people search for "css beautifier"?
One canonical URL: /developer/css-formatter/. The page name matches the Developer formatter family (JSON / XML / SQL / CSS). Queries like "css beautifier" and "css beautify" can land here; we do not publish a second /css-beautifier/ stub slug.
What happens if my CSS is invalid?
You get a short error next to the input and the output stays empty. The page does not invent missing braces or semicolons. Fix the CSS in an editor and paste again.
How is this different from XML Formatter or SQL Formatter on this hub?
XML Formatter parses XML with the browser's DOMParser. SQL Formatter pretty-prints SQL with a SQL-aware layout engine. This page formats CSS only. They share the same privacy rule (local only) but accept different languages — they do not convert between CSS, XML, and SQL.
Does it compile Sass, Less, or SCSS?
No. Paste plain CSS. Preprocessors, mixins, and nested Sass syntax are out of scope for v1. If you need a compiled stylesheet, run your usual build locally and paste the resulting CSS here to beautify or minify.
Can it handle very large stylesheets?
The page is meant for typical components and page-sized CSS. Multi-megabyte bundles can strain browser memory and slow the tab. There is no upload size limit, because nothing is uploaded — the limit is your browser's memory and responsiveness. For huge production bundles, prefer a local CLI formatter.
Is this an HTML formatter or a CSS validator?
No. It formats CSS text only. It does not beautify full HTML documents (use HTML Formatter at /developer/html-formatter/ for that), does not validate against the CSS specification beyond what the formatter can parse, and does not fetch remote stylesheets via @import.

What else can I open?

These tools run in your browser. Page Utils does not store, upload, or write to localStorage the keys, tokens, or text you paste. Results are a convenience aid, not legal, tax, or security advice.