CSS Formatter

What is a CSS formatter?

A CSS formatter (also called a CSS beautifier) takes stylesheet text and rewrites it with consistent indentation, line breaks, and spacing so selectors, properties, and at-rules are easy to scan. CSS controls the visual presentation of every modern website — layout, typography, color, animation, and responsive behavior. Developers maintain stylesheets ranging from a few utility classes to hundred-kilobyte design systems. Production builds minify CSS for performance, and copied snippets from DevTools arrive as unreadable single lines.

This tool restores readability in one click. Paste minified or messy CSS, choose your indentation preference, and get structured output. Copy it to your editor, download a .css file, or use the output panel as a scratch pad. Everything runs locally in your browser.

How to use the CSS formatter

1. Paste your CSS into the input panel. Click Load sample to try a card component with a media query.
2. Choose indentation — 2 spaces, 4 spaces, or tabs.
3. Click Format to beautify the stylesheet.
4. Review the output — each rule block is separated, properties are indented under their selector, and nested at-rules are clearly structured.
5. Copy or download the formatted CSS.

Example

Before: minified rule

.btn{display:inline-flex;align-items:center;padding:.5rem 1rem;border-radius:6px;background:#2563eb;color:#fff;font-weight:600}.btn:hover{background:#1d4ed8}

After: formatted

.btn {
  display: inline-flex;
  align-items: center;
  padding: .5rem 1rem;
  border-radius: 6px;
  background: #2563eb;
  color: #fff;
  font-weight: 600
}

.btn:hover {
  background: #1d4ed8
}

Each declaration is on its own line, making it trivial to spot the hover override and compare padding against a design spec.

Why formatting CSS matters

Stylesheet maintenance is a long-term investment. A readable file is easier to refactor when brand colors change, when dropping support for an old browser, or when consolidating duplicate rules. Code reviews catch specificity mistakes and unintended overrides faster when properties align vertically. Designers collaborating with engineers can follow the structure without reading minified text.

Debugging also benefits. When a layout breaks, the first question is which rule wins the cascade. A formatted stylesheet makes it easier to search for a selector, trace media query boundaries, and understand how component styles layer together.

Common use cases

• Build output inspection — Unminify a production bundle temporarily to trace a rogue style.
• Third-party overrides— Format a library's CSS before writing custom overrides with correct specificity.
• Documentation — Embed readable CSS examples in technical blog posts and wikis.
• Email styles — Inline CSS for email clients is easier to audit when formatted.

Related tools

• Format the markup with the HTML Formatter.
• Pick and convert colors with the Color Picker.
• Format companion JavaScript with the JavaScript Formatter.

Frequently asked questions