Format or minify CSS

Format or minify your code in CSS locally in your browser using WebAssembly.

Format your code now!
/* Welcome to HappyFormatter! */
body {
  font-family: Arial, sans-serif;
  background-color: #f0f0f0;
  margin: 0;
  padding: 20px;
}

.foo {
  background: yellow;
  border-radius: 2px;
  transition: background 200ms;
}

.foo.bar {
  color: green;
}

@media (color) and (hover) and (width > 1024px) {
  .a {
    color: green;
  }
}

@media (max-width: 600px) {
  body {
    background-color: lightblue;
  }
}
Valid css
body {
  background-color: #f0f0f0;
  margin: 0;
  padding: 20px;
  font-family: Arial, sans-serif;
}

.foo {
  background: #ff0;
  border-radius: 2px;
  transition: background .2s;
}

.foo.bar {
  color: green;
}

@media (color) and (hover) and (width > 1024px) {
  .a {
    color: green;
  }
}

@media (width <= 600px) {
  body {
    background-color: #add8e6;
  }
}

CSS Formatter


Happy Formatter's CSS Formatter and CSS Validator help to auto format CSS code and validate your CSS text.

  • CSS formatter online is the best tool to format CSS data.
  • CSS minifier online is the best tool to minify CSS data.
  • It helps to validate CSS online with error messages.
  • It's also a CSS Beautifier that supports indentation levels: 2 spaces, 3 spaces, and 4 spaces.
  • Supports printing of CSS data.
  • Stores data locally for the last CSS formatted in the browser's local storage. This can be used as a Notepad++, Sublime, or VSCode alternative for CSS beautification.
  • This CSS online formatter can also work as CSS Lint.
  • Use the auto switch to turn auto-update on or off for beautification.
  • It uses WebAssembly (WASM) to beautify CSS, making it easy for a human to read and analyze.
  • Download CSS once it's created or modified, and it can be opened in Notepad++, Sublime, or VSCode alternative.
  • CSS Format Checker helps to fix the missing quotes; click the setting icon which looks like a screwdriver on the left side of the editor to fix the format.

Know more about css:

  • CSS is a style sheet language used to describe the presentation of a document written in HTML or XML.
  • CSS is a cornerstone technology of the World Wide Web, alongside HTML and JavaScript.
  • CSS is designed to enable the separation of presentation and content, including layout, colors, and fonts.
  • CSS is a fundamental part of web design and is used to style web pages and web applications.

CSS Validator


CSS Validator Online checks the integrity/syntax of the CSS data based on CSS Specifications.

  • It's super easy to find the error when line numbers are highlighted with an in-detail error description.
  • Use the format button as a CSS Fixer to repair the error.
  • To validate CSS you just need internet and no need to install any software.
  • Your CSS data gets validated in the browser itself.

Frequently Asked Questions

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