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JavaScript Beautifier

Beautify and format JavaScript code with proper indentation and line breaks for readability.

JavaScript BeautifierGratisCSS & DevRuns in your browser

Works in your browser. What you paste or upload is processed on your device.

Key features of the JavaScript beautifier

  • Formats JS with consistent indentation (2 or 4 spaces)
  • Adds newlines and spacing for readability
  • Handles all JavaScript syntax including ES6+
  • Works on minified and poorly formatted code
  • Preserves all code logic and functionality

How to use the JavaScript beautifier

  1. Paste your JavaScript

    Enter minified or messy JS into the beautifier input.

  2. Beautify

    Click 'Beautify JS' to format and indent the code.

  3. Review the output

    See properly formatted, readable JavaScript.

  4. Copy the result

    Click 'Copy' to copy the beautified JS.

  5. Use for debugging

    Paste into your editor or browser DevTools to read and debug the code.

What is a JavaScript beautifier?

The JavaScript Beautifier formats minified, obfuscated, or poorly indented JavaScript into clean, readable code with proper indentation, spacing, and line breaks. It makes compressed production JS immediately readable for debugging, analysis, and editing.

Minified JavaScript is compact but completely unreadable — a single 50KB minified file is often a single line of code. When you need to understand, debug, or modify such code, the beautifier transforms it into readable, properly structured JavaScript in seconds.

Why use a JavaScript beautifier?

Debugging minified JavaScript, understanding third-party scripts, or working with inherited minified code is nearly impossible without a beautifier. This tool restores code readability instantly, enabling faster debugging and code comprehension without needing source maps.

JavaScript beautifier: frequently asked questions

Something else? Ask the team

Can I beautify ES6 and modern JavaScript?

Yes. The beautifier supports all modern JavaScript including ES6+ features: arrow functions, template literals, destructuring, async/await, classes, and modules.

Does beautification make obfuscated code readable?

Beautification adds formatting but cannot restore original variable names or structure if the code was obfuscated. It makes the structure readable, but obfuscated variable names (a, b, c1) remain.

Will beautification change my code logic?

No. Beautification only adds whitespace and formatting. All statements, expressions, and logic remain exactly as in the original code.

Can I beautify JSON with this tool?

JavaScript beautification will format JSON-like structures, but for pure JSON formatting, use the dedicated JSON Formatter tool which validates JSON syntax and formats it correctly.

Why is minified JavaScript hard to read?

Minification removes all whitespace and newlines, often renames variables to single letters, and removes all comments — producing compact but completely unreadable code as a single long string.

Each one opens on its own page and works straight away, with no sign-up.

Ontdek meer gratis tools:Schema GeneratorMetatag GeneratorLLMs.txt GeneratorBrowse all free tools

Meer AI-vermeldingen winnen?

JavaScript Beautifier is one piece of the puzzle. See how ChatGPT, Gemini, Perplexity, and Google AI Overviews actually view your brand, and get a prioritised list of fixes, with a free AEO & GEO audit from AI Rank Lab.

One check is a start. The audit checks the whole site.

Voer een gratis AEO- en GEO-audit uit or Bekijk prijzen.

  • Scores SEO, answer-engine (AEO) and generative-engine (GEO) readiness
  • Lists the fixes, page by page
  • Then track whether ChatGPT, Gemini, Perplexity and Google AI Overviews cite you
fieldnote.app4,571 credits

Site audit

fieldnote.app · SEO, AEO and GEO

Illustrative data
SEO
82
+6
AEO
64
+11
GEO
58
+9
Pages
48
Fixesby impact
  • /pricing · Missing H1High
  • /blog/guide · No FAQ schemaMedium
  • /llms.txt · Not foundMedium
  • /about · Meta description too longLow

See where your whole site stands

Paste your site. The free audit scores it for SEO, answer engines and generative engines, with the fixes.

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