CSS Beautifier

Format compact CSS into readable rules, selectors, and declarations.

Input
Output
0 characters 0 lines

What does CSS Beautifier do?

CSS Beautifier formats CSS rules, selectors, declarations, and blocks for readability.

  • Primary use: CSS Beautifier formats CSS rules, selectors, declarations, and blocks for readability.
  • Key technical fact: CSS declarations pair a property with a value, and rule blocks apply those declarations to selectors.
  • Practical check: Run the formatted or minified output through your parser, tests, or runtime when exact syntax behavior matters.
Topic Direct answer Source
Direct answer CSS Beautifier formats CSS rules, selectors, declarations, and blocks for readability. CSS Color Module Level 4
Key fact CSS declarations pair a property with a value, and rule blocks apply those declarations to selectors. CSS Color Module Level 4
Processing model Runs locally in the browser; no production Node server receives the input. Browser JavaScript

Make stylesheets easier to read and review

CSS Beautifier expands compact CSS into readable selectors, declaration blocks, properties, and values. It helps when debugging copied styles, reviewing generated CSS, inspecting framework output, or preparing examples.

Beautifying changes layout, not cascade semantics. Selector order, duplicate declarations, custom properties, comments, media queries, and layer order should remain intact because those details can affect final styles.

How to use

  1. Paste your CSS code into the input editor.
  2. Click Beautify CSS to reflow rules and declarations.
  3. Review the output for preserved selector order, comments, and at-rules.
  4. Use Copy for the clipboard, Download for a file, or Clear to reset.

What is CSS Beautifier?

CSS Beautifier is a browser-based utility for making stylesheets easier to scan. It separates rule blocks and declarations so you can inspect selectors, properties, values, and at-rules without reading a dense one-line file.

CSS behavior depends on cascade order, specificity, inheritance, layers, and custom property resolution. Formatting should not reorder rules or declarations; verify important stylesheet changes in the browser.

Input notes

Paste CSS only, including at-rules such as @media, @supports, and @layer. Keep selector and declaration order unchanged when copying the output back into a project.

Example

Dense CSS becomes easier to scan once each declaration is placed on its own line:

--- Minified Input ---
body{margin:0;padding:0;font-size:16px;}.container{max-width:1200px;}

--- Beautified Output ---
body {
  margin: 0;
  padding: 0;
  font-size: 16px;
}

.container {
  max-width: 1200px;
}

MCP integration

MCP (Model Context Protocol) lets AI agents and apps discover and run Coding.Tools utilities for repeatable conversions, formatting, hashing, and generation workflows.

MCP tool name: css-beautifier

MCP endpoint: https://coding.tools/mcp

Call tools/list first. Each tool entry includes inputSchema, outputSchema, and examples so an AI agent or client can build valid arguments without guessing.

For tools/call, read result.content[0].text for the display value and result.structuredContent for machine parsing. Tool-level failures return isError: true; protocol failures return a JSON-RPC error.

Example tools/call request:

curl -s https://coding.tools/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json" \
  -H "MCP-Protocol-Version: 2025-06-18" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"css-beautifier","arguments":{"input":".button{color:white;background:#3366cc;padding:8px 12px;}"}}}'

Most text and data tools accept an input string plus optional options. Browser-only image tools are listed for discovery and return a web UI link when they need browser image APIs.