MyAITools
Beautifier

JavaScript Beautifier

JavaScript Beautifier is a free online beautifier that helps you pretty-print JavaScript; consistent indentation and one statement per line for readable code. JavaScript Beautifier uses 2 input fields, returns 3 output values, and runs in your browser on the device.

Key facts

Inputs
2 fields: JavaScript and Indent
Outputs
3 values: Formatted JS, Original size (chars), and Formatted size (chars)
Runtime
your browser on the device
Mode
Beautifier
Privacy
Files and text stay in the browser session.
Cost
$0, no account required

How to use JavaScript Beautifier

  1. 1

    Paste or fill in the input

    Enter your text or values into the input fields on the page.

  2. 2

    Run the utility

    Click Compute to run the utility in your browser and review the result.

  3. 3

    Copy the output

    Copy the output value you need from the result panel.

JavaScript Beautifier details

First, enter JavaScript in JavaScript Beautifier. Next, review Formatted JS, Original size (chars), and Formatted size (chars). Additionally, JavaScript Beautifier uses 2 input fields and 3 output blocks so the result is easy to scan and copy.

Paste minified or compact JavaScript and reformat it with consistent indentation, line breaks and brace placement. Pick 2 spaces, 4 spaces or tabs to match your project style. Powered by js-beautify's js_beautify. Runs entirely in your browser; your source never leaves this page.

Common searches

  • javascript beautifier
  • js beautifier
  • js formatter
  • format javascript
  • pretty print javascript
  • js prettifier

Related tools

Tools that work with the same formats — most users open one of these next.

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DevFormatter

XML Formatter

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DevFormatter

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Reformat YAML — normalize indentation, line wrapping and quoting for tidy config files.

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DevValidator

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Validate JSON and see errors with line numbers — plus auto-format/beautify. Free, instant, in-browser.

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DevFormatter

SQL Formatter

Format SQL queries for every major dialect — Postgres, MySQL, SQLite, BigQuery, Snowflake and more.

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Frequently asked

What is JavaScript Beautifier?

JavaScript Beautifier is a free online beautifier that helps you pretty-print JavaScript; consistent indentation and one statement per line for readable code. JavaScript Beautifier uses 2 input fields, returns 3 output values, and runs in your browser on the device.

What inputs and outputs does JavaScript Beautifier use?

JavaScript Beautifier uses 2 input fields: JavaScript and Indent. JavaScript Beautifier returns 3 output values: Formatted JS, Original size (chars), and Formatted size (chars).

Do my files and data stay private?

Yes. JavaScript Beautifier runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.

How do I use JavaScript Beautifier?

Open JavaScript Beautifier, paste or fill in the input fields, and the result updates instantly. JavaScript Beautifier runs in your browser with no upload and no waiting.

Which browsers does JavaScript Beautifier support?

Any modern browser works in Chrome, Firefox, Safari, and Edge on desktop and mobile. JavaScript Beautifier uses standard web APIs and does not require any plugin, extension, or sign-up.