Code Beautifier
Format minified or messy HTML, CSS and JavaScript with clean indentation.
Readable Code From A Single Minified Line
Paste minified or badly indented HTML, CSS or JavaScript — the language is detected for you — and get it back re-indented, one statement or rule per line. HTML is indented by nesting, and the CSS inside <style> and the JavaScript inside <script> are formatted too.
The formatter reads code as tokens, not text, so a brace inside a string, a // inside a URL or a regular expression full of slashes is never mistaken for structure. <pre> and <textarea> keep every character, because there the whitespace is the content.
Key features
- HTML, CSS and JavaScript, detected automatically.
- Token-aware — strings, template literals, comments and regexes are untouched.
- Nested formatting — style and script blocks inside HTML.
- 2 spaces, 4 spaces or tabs.
- Minify switch for HTML and CSS, and a one-click download.
This tool runs entirely inside your browser using native Web APIs. Your files and text are never uploaded to a server, never logged and never shared with third parties.
How to use: Code Beautifier
- Paste the code
Minified bundles, copied page source or a messy stylesheet. - Check the language
Detection is automatic; override it if needed. - Choose the indent
Match your project’s style. - Copy or download
The result keeps the right file extension.
Technical specifications
| Processing location | Entirely in your browser — no server round trip |
|---|---|
| Data uploaded | None. Files and text never leave your device |
| Price | Free — no account, no trial, no usage cap |
| Category | Developer |
| Works offline | Yes, once the page has loaded |
| Browser support | Chrome 90+, Edge 90+, Firefox 90+, Safari 15+ |
| Interface languages | English, 中文, हिन्दी, Español, العربية |
Frequently asked questions
Will beautifying change how my code works?
No. Only whitespace between tokens changes. Names, order and logic stay exactly as they were, and strings, comments and regular expressions are copied through unchanged.
Can it reverse minification?
It restores the layout, but not what minifiers remove: comments and original variable names are gone for good. For readable names you need the source map or the original source.
Why is my <pre> block not re-indented?
In <pre> and <textarea> the whitespace is part of what is displayed, so changing it would change the page. They are deliberately left as they are.
Is it the same as Prettier?
Prettier is an opinionated formatter that rewrites quotes, wraps long lines and adds semicolons. This beautifier only re-indents and spaces code, so the output differs from the input in whitespace alone.
Can it minify too?
It minifies HTML and CSS. For JavaScript, use the Code Minifier, which understands the language well enough to shrink it safely.