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Code Beautifier & Formatter

Clean, format, and structure your messy HTML, CSS, JavaScript, and JSON code instantly.

Raw Messy Code 0 chars
Beautified Code
0 chars
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About This Tool

Code Beautifier

Instantly format and prettify messy, minified, or unindented code across HTML, CSS, JavaScript, and JSON.

Why Use This Tool?

  • Clean up minified code from production environments for easy reading
  • Format code before sharing with teammates or in code reviews
  • Improve readability of code copied from websites, APIs, or documentation
  • Used by developers, designers, and students learning web development
  • Fix indentation and spacing issues in seconds without any IDE

Overview

When working with source code, readability is as important as functionality. Minified, compressed, or poorly indented code is nearly impossible to read, debug, or modify. Our Code Beautifier tool instantly formats and prettifies any messy or minified code across multiple programming and markup languages including HTML, CSS, JavaScript, and JSON. Whether you have copied minified code from a production website, received a single-line JSON payload from an API, or inherited a codebase with inconsistent indentation, our tool transforms it into clean, properly indented, human-readable code in one click. The beautifier handles nested structures, mixed quote styles, and complex formatting edge cases intelligently. This is an essential tool for web developers, frontend engineers, and students learning to read and write clean code. It saves hours of manual formatting work and helps you focus on understanding logic rather than deciphering structure. The tool works entirely in your browser — no code is sent to any server, ensuring your proprietary code remains completely private.

How to Use

  • 1

    Select the Language

    Choose the code language you want to beautify: HTML, CSS, JavaScript, or JSON from the tabs or dropdown.

  • 2

    Paste Your Code

    Copy and paste your minified, messy, or unformatted code into the input area on the left.

  • 3

    Click Beautify

    Press the Beautify button. The tool instantly formats your code with proper indentation and spacing.

  • 4

    Review the Output

    The formatted code appears in the output panel. Review it to confirm it looks correct and readable.

  • 5

    Copy or Download

    Click Copy to copy the formatted code to your clipboard, or Download to save it as a file.

Frequently Asked Questions

No. Beautifying only changes whitespace and formatting. The logic and functionality of the code remain exactly the same.
Yes. Paste the minified JS into the input and click Beautify. This is useful for understanding how a script works, though the variable names may still be minified.
Currently it supports HTML, CSS, JavaScript, and JSON. TypeScript is largely compatible with the JavaScript formatter. PHP support is planned.
The tool handles files up to several hundred kilobytes in the browser. For very large files, processing may take a moment.
Yes. Use the settings option to choose your preferred quote style (single or double) and indentation size (2 or 4 spaces, or tabs).
Unformatted

Hello World

Let's make this html formatted properly in the browser client side.

`, css: `body{background:#000;color:#fff;font-family:sans-serif;}h1{font-size:2rem;margin-bottom:10px;}.card{padding:20px;border-radius:8px;background:rgba(255,255,255,0.1);box-shadow:0 4px 6px rgba(0,0,0,0.1);}`, json: `{"name":"FreeAll Tools","version":"1.0.0","description":"Developer Multi-tool Platform","active":true,"features":["Beautiful Glassmorphic Design","Fully Client-side","Fast Processing"],"creator":{"name":"Gemini","role":"Developer"}}` }; function updateInputStats() { const val = document.getElementById('raw-code').value; document.getElementById('input-stats').textContent = val.length.toLocaleString() + ' chars'; } function handleLangChange() { const raw = document.getElementById('raw-code').value.trim(); if (!raw) { loadSample(); } } function loadSample() { const lang = document.getElementById('language').value; document.getElementById('raw-code').value = samples[lang] || ''; updateInputStats(); showToast('Loaded sample code!'); } function clearCode() { document.getElementById('raw-code').value = ''; document.getElementById('beautified-code').value = ''; updateInputStats(); document.getElementById('output-stats').textContent = '0 chars'; document.getElementById('time-elapsed').textContent = ''; showToast('Cleared editors'); } function beautifyCode() { const raw = document.getElementById('raw-code').value; if (!raw.trim()) { showToast('Please enter some code first', 'error'); return; } const lang = document.getElementById('language').value; const indentVal = document.getElementById('indent-size').value; const wrapLength = parseInt(document.getElementById('wrap-line-length').value, 10); let indent_char = ' '; let indent_size = 4; if (indentVal === 'tab') { indent_char = '\t'; indent_size = 1; } else { indent_size = parseInt(indentVal, 10); } const opts = { indent_size: indent_size, indent_char: indent_char, wrap_line_length: wrapLength, preserve_newlines: true, max_preserve_newlines: 2, jslint_happy: false, space_after_anon_function: true, brace_style: "collapse", keep_array_indentation: false, space_before_conditional: true }; const startTime = performance.now(); let result = ''; try { if (lang === 'json') { // Try parsing JSON first for precise native format try { const parsed = JSON.parse(raw); const indentStr = indentVal === 'tab' ? '\t' : ' '.repeat(indent_size); result = JSON.stringify(parsed, null, indentStr); } catch (e) { // If native parse fails, fall back to js_beautify result = js_beautify(raw, opts); } } else if (lang === 'html') { result = html_beautify(raw, opts); } else if (lang === 'css') { result = css_beautify(raw, opts); } else { result = js_beautify(raw, opts); } const duration = (performance.now() - startTime).toFixed(1); document.getElementById('beautified-code').value = result; document.getElementById('output-stats').textContent = result.length.toLocaleString() + ' chars'; document.getElementById('time-elapsed').textContent = `Formatted in ${duration}ms`; showToast('Code beautified successfully!'); } catch (err) { showToast('Error formatting: ' + err.message, 'error'); } } function copyBeautified() { const val = document.getElementById('beautified-code').value; if (!val) { showToast('Nothing to copy', 'error'); return; } navigator.clipboard.writeText(val).then(() => { showToast('Formatted code copied!'); }); } function downloadBeautified() { const val = document.getElementById('beautified-code').value; if (!val) { showToast('Nothing to download', 'error'); return; } const lang = document.getElementById('language').value; const extensions = { html: 'html', css: 'css', javascript: 'js', json: 'json' }; const ext = extensions[lang] || 'txt'; const blob = new Blob([val], { type: 'text/plain;charset=utf-8' }); const url = URL.createObjectURL(blob); const a = document.createElement('a'); a.href = url; a.download = `beautified.${ext}`; a.click(); URL.revokeObjectURL(url); showToast('Downloaded code file!'); } function toggleTheme() { document.body.classList.toggle('light'); const isLight = document.body.classList.contains('light'); localStorage.setItem('theme', isLight ? 'light' : 'dark'); document.getElementById('theme-icon').setAttribute('data-lucide', isLight ? 'sun' : 'moon'); lucide.createIcons(); } (function(){ if(localStorage.getItem('theme')==='light'){ document.body.classList.add('light'); setTimeout(() => { const themeIcon = document.getElementById('theme-icon'); if(themeIcon) themeIcon.setAttribute('data-lucide','sun'); lucide.createIcons(); }, 50); } })(); function showToast(msg, type='success') { const t = document.createElement('div'); t.style.cssText = 'position:fixed;bottom:24px;right:24px;background:rgba(15,12,41,0.95);backdrop-filter:blur(12px);border:1px solid rgba(6,182,212,0.4);color:#e2e8f0;padding:12px 18px;border-radius:12px;font-size:0.85rem;font-weight:500;z-index:9999;animation:slideIn 0.3s ease'; t.textContent = (type==='success' ? '✅ ' : '❌ ') + msg; document.body.appendChild(t); setTimeout(() => t.remove(), 3000); } if(!document.getElementById('toast-anim-style')){ const s = document.createElement('style'); s.id = 'toast-anim-style'; s.textContent = '@keyframes slideIn{from{opacity:0;transform:translateX(60px)}to{opacity:1;transform:translateX(0)}}'; document.head.appendChild(s); } // Load default sample on init loadSample(); lucide.createIcons(); // FAQ Accordion document.querySelectorAll('.faq-question').forEach(function(btn) { btn.addEventListener('click', function() { var expanded = this.getAttribute('aria-expanded') === 'true'; document.querySelectorAll('.faq-question').forEach(function(b) { b.setAttribute('aria-expanded', 'false'); b.nextElementSibling.classList.remove('open'); }); if (!expanded) { this.setAttribute('aria-expanded', 'true'); this.nextElementSibling.classList.add('open'); } }); });