AeroTools
Free tool

Code Beautifier

Minified or messy code is hard to read, review, and debug. Our Code Beautifier reformats HTML, CSS, and JavaScript with clean, consistent indentation in a single click — right inside your browser. Your code is never uploaded, so proprietary or unpublished work stays private.

Paste in a tangled block, pick the language, and get neatly structured output you can actually read. It is ideal for tidying snippets copied from the web, un-minifying production files for inspection, or standardizing formatting across a team.

Code Beautifier

Format and beautify code with one click.

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[23:13:05][SYS] COMPILER PIPELINE INITIALIZED. SELECT A LANGUAGE AND INPUT SOURCE.

How to beautify your code

  1. 1 Paste your HTML, CSS, or JavaScript into the input area.
  2. 2 Select the correct language so formatting rules apply properly.
  3. 3 Click beautify to reformat with clean, consistent indentation.
  4. 4 Review the highlighted, structured output.
  5. 5 Copy the result — your original code is never sent anywhere.

Why use this beautifier

One-click formatting

Turn minified or messy code into clean, readable structure instantly.

HTML, CSS & JS

Handles the three core web languages with the right rules for each.

Private processing

Formatting happens locally, so your code never leaves your device.

Common use cases

  • Cleaning up snippets copied from tutorials or Stack Overflow.
  • Un-minifying production CSS or JS to inspect what it does.
  • Standardizing indentation before committing code to a repository.
  • Making a colleague's hard-to-read block easier to review.
  • Formatting HTML exported from a builder into readable markup.

Frequently asked questions

Is my code uploaded to a server?

No. Beautification runs entirely in your browser, so your code stays on your device.

Which languages are supported?

HTML, CSS, and JavaScript are supported with formatting rules tailored to each.

Does it change what my code does?

No. It only changes spacing and indentation for readability; the logic and output remain identical.

Can it un-minify compressed files?

Yes. Paste minified code and it will expand it into a readable, indented form.

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