ALLYX ONE
100% browser-based · zero uploads

Code Formatter

Beautify and reformat code online for free — paste JavaScript, TypeScript, HTML, CSS, JSON, or XML to instantly indent and clean it up. No sign-up, no account, nothing leaves your browser.

Indent

How It Works

1

Choose your language

Pick JavaScript, TypeScript, HTML, CSS, JSON, or XML from the dropdown. The formatter applies the right rules for that language.

2

Paste your code

Drop any minified, compressed, or poorly indented code into the input box. Everything stays in your browser — nothing is sent anywhere.

3

Copy the result

Formatted code appears instantly in the output panel. Click Copy to grab it. No button to press, no waiting — results are live as you type.

How to Format Code Online

  1. Select your programming language from the Language dropdown — JavaScript, TypeScript, HTML, CSS, JSON, or XML.
  2. Paste your raw, minified, or messy code into the Input panel. The formatted output appears immediately in the panel below.
  3. Adjust the Indent size (2 or 4 spaces) to match your project's code style.
  4. Click Copy to send the formatted code to your clipboard, then paste it directly into your editor.

Features

  • Six languages supported: JavaScript, TypeScript, HTML, CSS, JSON, and XML — all in one tool.
  • Instant output: The formatter runs as you type — no button to press.
  • 2-space and 4-space indentation: Match the code style of any project or team.
  • Smart brace tracking for JS/TS: A brace and bracket counter rebuilds indentation correctly across nested functions, classes, objects, and arrays.
  • Tag-aware HTML and XML: Opening and closing tags drive indentation depth; void elements (<br>, <img>, <input>) never cause mis-indentation.
  • CSS rule formatting: Selectors, declarations, and media queries are each placed on their own lines with consistent indentation.
  • JSON validation: JSON is parsed with the browser's native parser — invalid JSON shows a precise error message.
  • Your code stays private: Everything runs client-side in your browser — nothing is uploaded, stored, or logged.
  • No account required: Open the page and start formatting straight away.
  • Works offline: Pure JavaScript — once the page loads, no network connection is needed.

Frequently Asked Questions

Is my code uploaded to your servers?

No. All formatting happens locally in your browser using JavaScript. Your code never leaves your device and is never sent to or stored on any server.

Is this code formatter free to use?

Yes, completely free — no account, no sign-up, and no usage limits.

Which languages are supported?

The formatter supports JavaScript, TypeScript, HTML, CSS, JSON, and XML. Select the language from the dropdown before pasting your code.

How does the JavaScript formatter work?

The JS/TS formatter uses a brace-tracking algorithm: it strips existing indentation, then rebuilds it line-by-line by counting opening and closing braces, brackets, and parentheses. String literals, template literals, and inline comments are parsed verbatim so their content is never misidentified as code structure.

How does the HTML formatter work?

The HTML formatter tokenises the markup into opening tags, closing tags, self-closing tags, comments, and text nodes. It then rebuilds the document with each nested element indented one level deeper than its parent. Void elements such as <br>, <img>, and <input> are never given a closing depth change.

Does the code formatter work offline?

Yes. The tool is pure client-side JavaScript — once the page has loaded, it works without an internet connection.

What indentation options are available?

You can choose between 2-space and 4-space indentation. Both are widely used conventions — 2 spaces is standard in JavaScript and TypeScript projects, while 4 spaces is common in Python, Java, and C-family languages.