Code Beautifier

Beautify and format JavaScript, HTML and CSS code online with clean indentation — free.

About

About the Code Beautifier

Automatically reformats messy JavaScript, HTML or CSS with consistent indentation, using js-beautify — a small, well-known formatting library loaded from this site the first time you use it — but the formatting itself runs entirely in your browser.

Developers use it to tidy up minified or inconsistently indented code, while students use it to see what properly formatted code looks like. It's one of many free developer tools on Toolapt, and like every tool here, it's free to use with no sign-up and no limit on how many times you run it.

Choose what to view about this tool

Guide

Using the Code Beautifier

  1. 1

    Step 1

    Paste your messy code into the Input box.

  2. 2

    Step 2

    Choose the language — JavaScript, HTML or CSS.

  3. 3

    Step 3

    Set the indent size you prefer.

  4. 4

    Step 4

    Click "Beautify" to see the formatted result, then Copy it.

  • Formats JavaScript, HTML and CSS with a real, well-known formatting library
  • Lets you set the indent size (1–8 spaces) to match your project's style
  • Loads the formatting library from this site only the first time you use each language
  • Your code is formatted locally and never uploaded to a server
  • Free to use, with no limit on how many times you run it
  • Fully responsive, so it works just as well on a phone as on a desktop

Developers

Developers use the Code Beautifier for tidying up minified or inconsistently indented code before reading or editing it.

Students learning to code

Students learning to code use the Code Beautifier for seeing what properly indented code is supposed to look like.

Code reviewers

Code reviewers use the Code Beautifier for reformatting a snippet before pasting it into a review comment or ticket.

Anyone pasting code from a chat or PDF

Anyone pasting code from a chat or PDF uses the Code Beautifier for restoring readable formatting that got stripped out.

Examples

Code Beautifier examples

3 worked examples

01

Minified CSS in

Beautifying body{color:red;margin:0} with a 2-space indent produces "body { color: red; margin: 0; }" laid out one declaration per line.

02

Cramped JavaScript

Beautifying function add(a,b){return a+b;} produces "function add(a, b) { return a + b; }" with braces and spacing normalized.

03

One-line HTML

Beautifying <div><p>Hi</p></div> produces the div and p tags on separate lines, with the p indented one level inside the div.

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FAQ

Frequently asked questions

Quick answers to common questions about the Code Beautifier.

What does the Code Beautifier do?

It automatically reformats messy JavaScript, HTML or CSS with consistent indentation, using a real code-formatting library.

Is the Code Beautifier free to use?

Yes. It's free, with no sign-up, no watermark and no limit on how many times you use it.

Is my code safe when I use this tool?

Yes. Your code is formatted entirely on your own device. A small formatting library (js-beautify) is loaded from this site the first time you use each language, but your code itself is never uploaded.

Which languages does it support?

JavaScript, HTML and CSS.

Can I control the indent size?

Yes. Set any indent size from 1 to 8 spaces before beautifying.

Why does it need to load a formatting library?

Reliable code formatting needs a real parser for each language — building that from scratch wouldn't be as accurate as js-beautify, the same library many editors and build tools already use.

Can I use the Code Beautifier on my phone?

Yes. The page is fully responsive and works on mobile, tablet and desktop browsers alike.

Does the Code Beautifier have any limitations?

It formats one language at a time; mixed-language files (like HTML with embedded JavaScript) are formatted as HTML, not split apart.

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