CSS Formatter

How to use CSS Formatter

Three simple steps, with your content kept on your device.

Built for useful work

Fast, focused, and made to be clear on every screen.

Why use a CSS formatter

A CSS beautifier converts minified or compressed stylesheets into readable, consistently indented source. Modern CSS projects often combine custom properties, nesting, and at-rules in a single file, and even indentation makes the structure of selectors and declaration blocks immediately obvious.

Readable stylesheets are easier to audit and maintain. When every rule sits at the correct indentation level, you can spot unclosed blocks, misplaced declarations, and unintended nesting far more quickly than in a single long line of minified CSS.

How to pretty print CSS

To pretty print CSS, paste your stylesheet into the editor, choose two spaces, four spaces, or tabs for each block level, and run the formatter. The output keeps your selectors, declarations, and values intact while arranging them into readable blocks.

The formatter is lexical, so it understands structure without executing the stylesheet. Comments stay in place, strings are not modified, and data URLs inside declarations are preserved exactly as written.

Modern CSS support

Modern stylesheets use more than simple selectors and declarations. The formatter handles at-rules such as @media, @layer, and @container, plus nested rules, custom property declarations, and functions, without flattening or rewriting them.

Unknown future syntax is treated lexically: balanced blocks are indented and preserved, so the tool does not break when CSS evolves. That makes it safe to format bleeding-edge stylesheets as well as long-stable code.

What stays protected

Custom properties are a common source of formatting bugs because their values can contain balanced braces, brackets, functions, and semicolons. The formatter recognizes custom property declarations and preserves the value block exactly.

Comments are never stripped. Whether you use /* */ to document sections or to comment out rules temporarily, every closed block comment is retained in the formatted output.

Formatting CSS locally

Formatting CSS in the browser keeps proprietary stylesheets and design systems on your machine. There is no upload step, no account, and no server round trip, so even large design-token files format instantly and can be processed offline.

Because the result is deterministic, you can run the same stylesheet through the tool repeatedly and always receive identical output — useful for keeping committed styles consistent across a team.

Related stylesheet tools

CSS rarely stands alone. The HTML Formatter handles the markup that consumes your styles, and the SQL Formatter beautifies database queries used by the applications those pages power.

When you need to check how colors in your stylesheet will appear to users, the Color Contrast Checker verifies text and background pairs for accessibility, and the Color Palette Generator helps you build new schemes from a starting color.

Formatting options explained

Indentation width is a project convention rather than a technical requirement. Two spaces are common in modern CSS, four spaces give each level stronger visual separation, and tabs let individual developers adjust the displayed width. The formatter supports all three so the output matches your team's style.

The output is deterministic — the same stylesheet always produces the same formatted result. That makes the tool useful for normalizing third-party CSS before review and for keeping committed styles consistently formatted.

From minified bundles to hand-edited design systems, a local CSS beautifier turns any stylesheet into readable source in seconds, without uploading your code or waiting on a server.

Formatting is a habit worth building: readable CSS is easier to review, easier to diff in pull requests, and easier for new team members to understand. Keeping a formatter one click away means minified third-party CSS can be inspected before it is trusted, and hand-written rules stay consistent across the codebase.

Run the same stylesheet through the tool at any point and the indentation stays stable, so committed CSS can be normalized once and remain readable for the life of the project.

Frequently asked questions