Beautify CSS Online — Free CSS Beautifier

Beautify CSS code instantly with our free online tool. Format stylesheets with consistent indentation. All processing in your browser.

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CSS Beautification

Beautify CSS online. Consistent indentation and spacing — instant browser processing, no uploads.

Features

Format and beautify your CSS code with customizable indentation (2 or 4 spaces, or tabs).

Beautify

Format and beautify your CSS code with customizable indentation (2 or 4 spaces, or tabs).

Package used

CSSO

v5.0.5

CSSO (CSS Optimizer) is a powerful tool for optimizing CSS files by removing redundancies and compressing code.

Basic example

Minified CSS

.container{margin:20px;padding:10px;background-color:#fff}.button{color:#000;font-size:16px;border:1px solid #ccc}.card{display:flex;flex-direction:column;gap:12px;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,.12)}

Beautified CSS

.container {
  margin:20px;
  padding:10px;
  background-color:#fff;
}

.button {
  color:#000;
  font-size:16px;
  border:1px solid #ccc;
}

.card {
  display:flex;
  flex-direction:column;
  gap:12px;
  border-radius:8px;
  box-shadow:0 2px 8px rgba(0,0,0,.12);
}

Minification options

Beautify Options

Indentation options for Beautify and Unminify (not used by Minify)

Indentation Size

Sets the number of spaces or tabs for indentation during Beautify and Unminify

Original code

.header{color:red;padding:10px}

With 2 spaces

.header {
  color: red;
  padding: 10px;
}

With 4 spaces

.header {
    color: red;
    padding: 10px;
}

Difference

Beautify and Unminify both use the indentation controls in the toolbar. Minify ignores them.

Indentation Type

Use spaces or tabs for indentation during Beautify and Unminify

Original code

.header{color:red;padding:10px}

With spaces

.header {
  color: red;
  padding: 10px;
}

With tabs

.header {
	color: red;
	padding: 10px;
}

Difference

Spaces are more standard, tabs may be preferred according to your code conventions.

How to Unminify CSS Online

CSS unminification restores readable formatting to compressed stylesheets. Paste any minified CSS into our tool to add proper indentation, line breaks, and organize selectors. This is essential for debugging production stylesheets, reviewing third-party CSS frameworks, or understanding vendor styles.

CSS Beautifier — Formatting Your Stylesheets

Our CSS beautifier applies consistent formatting rules to your stylesheets — standardized indentation, property ordering, and clean selector formatting. Whether your CSS comes from a build process, a minifier, or another developer, beautification makes it clean and maintainable.

Frequently Asked Questions — Beautify

Everything about beautification

What does the CSS beautifier do?

It formats CSS with consistent indentation, spacing and line breaks without changing how styles render.

Can I choose indentation?

Yes — pick 2 or 4 spaces or tabs in the Beautify options.

Is my CSS uploaded to a server?

No. Beautification runs entirely in your browser — your CSS never leaves your device and is not stored by FastMinify.

Beautify vs unminify — which should I use?

Beautify formats readable CSS; unminify restores compressed output — try the CSS unminifier. For day-to-day formatting, stay on CSS beautifier.

Beautify

Make code readable with consistent indentation — beautify JavaScript, CSS, TypeScript, SCSS, LESS, Markdown, GraphQL, SQL, YAML and more in your browser.

Beautify JS

Beautify JSON

Beautify HTML

Beautify XML

Beautify SVG

Beautify SQL

Beautify YAML

Beautify TypeScript

Beautify SCSS

Beautify LESS

Beautify Markdown

Beautify GraphQL

Beautify TOML

Explore other tool categories

Minify

Shrink code and assets for production — minify JavaScript, CSS, HTML, JSON and XML before gzip or CDN deploy.

Unminify

Expand minified or compressed code — unminify JavaScript, CSS, TypeScript, SCSS, LESS, SQL, YAML and other formats when debugging or reviewing.

Conversion

Transform data between JSON, YAML, XML and CSV locally — no server uploads.

CSS preprocessors

Compile SCSS or LESS to standard CSS in the browser — pair with beautify or minify for a full stylesheet workflow.

JSON Tools

Validate, format, diff and explore JSON payloads — complementary to minifiers and converters.

SVG Tools

Preview, optimize with SVGO, export Data URI, resize, beautify, convert to JSX and validate SVG — all in your browser.

DevOps & Infra

Terraform HCL format/validate/minify, Dockerfile format & lint, Docker Compose and .env validation.

CI/CD

GitHub Actions and GitLab CI — format YAML and check workflow/job structure in your browser.

Logs & observability

Line-oriented JSON/NDJSON and Nginx/Apache access logs — format, filter, validate, and CSV/TSV.

Kubernetes

Multi-doc manifests, structural validate, Ingress/Deployment starters, and Helm values formatting.

Networking / IP

CIDR, subnets, and IPv4/IPv6 helpers — in your browser.

Security & tokens

JWKS, X.509 certificates, and secrets scan — browser-local.

API & schemas

OpenAPI tools to format, validate, and lint your specs.

Encoding

Encode or decode Base64, URL components and HTML entities — client-side only.

Developer utilities

Timestamps, UUID, ULID, Nanoid, cron, passwords, regex, slugify, number bases, case, text diff, and chmod — all client-side.

Text & Markdown

Count words, build Markdown TOCs, and clean line lists — all in your browser.

AI & LLM

Token counting, pricing estimates, and context-window fit — 100% browser-local.

Serialization

Serialize and deserialize PHP data structures beside JSON workflows.