Code Beautifier

Format and minify JSON, JavaScript, HTML, and CSS code

The Code Beautifier is a browser-based tool that formats and minifies JSON, JavaScript, HTML, and CSS code with proper indentation, supporting both pretty-print and compact output modes.

Code Input

Paste code to format

About Code Beautifier

Paste your code above and select the language. Click “Format” to pretty-print with proper indentation, or “Minify” to compress into minimal whitespace. Supports JSON validation, JavaScript formatting, HTML tag indentation, and CSS property formatting.

Frequently Asked Questions

How do I format and beautify messy JavaScript or HTML code online?

Select the language from the dropdown (JSON, JavaScript, HTML, or CSS), paste your code into the input area, and click Format. The tool applies proper indentation rules for the selected language — tag nesting for HTML, block scope indentation for JavaScript, and property grouping for CSS. The status bar shows the character count before and after formatting.

Is my source code sent to a server when using this code formatter?

No. All formatting logic runs entirely in your browser. Your code — including any hardcoded secrets, API endpoints, or business logic — never leaves your device. This makes the tool safe to use with proprietary code, internal configuration, or minified production bundles you are trying to inspect.

What is the difference between this Code Beautifier and the separate JSON Formatter tool?

The JSON Formatter is specialized for JSON only, providing JSON-specific validation with precise error messages. The Code Beautifier handles JSON as one of four languages, but also supports JavaScript, HTML, and CSS. If you are working exclusively with JSON and need accurate validation error messages with character positions, prefer the dedicated JSON Formatter.

Can I use this tool to minify JavaScript or CSS for production?

The tool provides basic minification by removing whitespace and newlines, which reduces file size. However, it does not perform tree-shaking, dead-code elimination, variable renaming, or other advanced optimizations. For production-grade minification, use purpose-built tools like Terser for JavaScript, cssnano for CSS, or bundlers like webpack or Vite.

What JavaScript formatting features does this code beautifier support?

The JavaScript formatter handles indentation of blocks, functions, and control structures. It does not parse or enforce a specific code style (no Prettier or ESLint rules). Formatting is structural — brace positioning, statement indentation, and whitespace normalization — rather than style-guide enforcement. For team consistency, integrate a proper linter with a shared config in your project.