Online CSS Formatter

CSS

Online CSS formatter that works directly in your browser. Format and beautify CSS code instantly. It runs in your browser, and your input stays on this device.

Back to CSS Formatter

Formatter example

Compare the exact input shape with the cleaned output before opening the editor.

Local preview

Before

input
.button {
 color: white;
 background: black;
}

After

formatted
.button {
  color: white;
  background: black;
}

Workflow

Use CSS without sending code.

Paste a snippet, run the action, review any highlighted issue, then copy the result back to your work.

Current language
CSS
Current action
CSS Formatter
  1. 01

    Start

    Paste a snippet or full file into the editor.

  2. 02

    Run

    Use Run CSS Formatter from the action bar.

  3. 03

    Review

    Fix syntax issues if processing stops.

  4. 04

    Move

    Use Copy code when the result is ready.

Files
.css
Paste a CSS snippet or a full source file.
Engine
Lightning CSS
Runs the browser-side formatter for readable output.
Privacy
Local run
The editor does not send pasted code to a formatting API.
Result
Readable output
Move the formatted code back to your editor.