Which programming languages are supported?

The Code Beautifier supports JavaScript (ES6+), HTML5, CSS3, JSON, and XML.

Does beautifying change how my code runs?

No. Beautification only adjusts non-semantic whitespace and indentation. The underlying execution logic and syntax remain completely identical.

Is my code uploaded to a remote server?

No. All formatting logic runs entirely inside your browser web engine using JavaScript.

Code Beautifier

Beautify, indent, and format JavaScript, HTML, CSS, JSON, and XML code online.

TL;DR: Code Beautifier is a free, browser-based tool that lets you beautify, indent, and format JavaScript, HTML, CSS, JSON, and XML code online.

Source Code to Beautify

Upload

Beautified Code Output

What Is the Code Beautifier?

Code Beautifier formats and indents HTML, CSS, JavaScript, JSON, and XML code according to industry formatting conventions (Prettier, StandardJS, W3C), improving code readability.

Step-by-Step: Using This Tool

Select your language: JavaScript, HTML, CSS, JSON, or XML.
Paste your unformatted or minified code into the editor.
Choose indentation size (2 spaces, 4 spaces, or Tabs).
Click 'Beautify Code' and copy the clean, formatted output.

Maximize Your Results

De-Minify Production Scripts: Turn dense, unreadable single-line production JS/CSS into clean, readable code for debugging.
Standardize Team Code: Format pasted code snippets to match consistent team indentation standards.
Client-Side Processing: Formats proprietary source code entirely in your browser with zero server transmission.

Related Guides & Tutorials

Json Formatting For Developers — Learn in-depth concepts, best practices, and expert tips.
Base64 Encoding Explained — Learn in-depth concepts, best practices, and expert tips.

100% Client-Side Privacy Guarantee

All processing runs locally inside your browser using JavaScript and HTML5 APIs. Your data, files, and inputs are never uploaded to any remote server. Complete privacy by design.

Frequently Asked Questions

: The Code Beautifier supports JavaScript (ES6+), HTML5, CSS3, JSON, and XML.
: No. Beautification only adjusts non-semantic whitespace and indentation. The underlying execution logic and syntax remain completely identical.
: No. All formatting logic runs entirely inside your browser web engine using JavaScript.

Cite This Tool

Referencing this tool in a paper, article, or bibliography? Copy a ready-made citation below.

NexLove.org. (2026). Code Beautifier [Software]. https://nexlove.org/tools/code-beautifier.html

“Code Beautifier.” NexLove.org, 2026, nexlove.org/tools/code-beautifier.html.

NexLove.org (2026) Code Beautifier. Available at: https://nexlove.org/tools/code-beautifier.html (Accessed: 2026).

@misc{nexlove_code_beautifier,
  title = {Code Beautifier},
  author = {{NexLove.org}},
  year = {2026},
  url = {https://nexlove.org/tools/code-beautifier.html}
}

Embed This Tool

Add the live Code Beautifier tool to your own website with this snippet — it loads the real, working tool in an iframe, not a static screenshot.

<iframe src="https://nexlove.org/embed/code-beautifier.html" width="100%" height="600" style="border:1px solid #e2e8f0;border-radius:12px" title="Code Beautifier — NexLove.org" loading="lazy"></iframe>

Code Beautifier Technical Details

Built for developers, this utility provides instant data formatting, conversion, and inspection without the overhead of heavy IDEs.

Features

Zero Latency: All parsing and formatting happens entirely in your browser using local JavaScript engines.
Data Security: Your payloads, tokens, and code snippets are never sent to a backend server, making it safe for proprietary code.
Strict Standards: Follows standard encoding and RFC protocols to ensure output validity.

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