Code Minifier Tool – Minify HTML, CSS & JS Online | Free & Fast

⚡ Code Minifier Tool

Minify HTML, CSS & JavaScript code instantly — reduce file size, boost website performance & save bandwidth. Free, fast & professional.

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Original Size
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Minified Size
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Bytes Saved
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Reduction
HTML Minifier
CSS Minifier
JS Minifier
Full Minifier

HTML Minifier

Remove whitespace, comments & optimize HTML structure

Options:
📝 Input HTML
✅ Minified Output

CSS Minifier

Compress CSS by removing comments, whitespace & redundancies

Options:
📝 Input CSS
✅ Minified Output

JavaScript Minifier

Compress JS by removing comments, whitespace & formatting

Options:
📝 Input JavaScript
✅ Minified Output

Full Code Minifier

Minify HTML, CSS & JavaScript all at once in one step

HTML Code
Input HTML
Minified HTML
CSS Code
Input CSS
Minified CSS
JavaScript Code
Input JavaScript
Minified JavaScript
Lightning Fast
Instant client-side minification — no server needed
🔒
100% Secure
Your code never leaves your browser
📉
Size Reduction
Shrink file size up to 80% or more
🎛️
Custom Options
Fine-tune minification with toggle options
📋
Copy & Download
One-click copy or download minified files
📱
Mobile Friendly
Works perfectly on all screen sizes
How to Use – User Guide
1
Select Type
Choose HTML, CSS, JS, or Full Minifier from the top tabs
2
Paste Code
Paste your original code into the left input area or use the Sample button
3
Set Options
Customize minification options using the checkboxes above the editor
4
Click Minify
Press the Minify button — results appear instantly in the right pane
5
Copy or Download
Copy the output to clipboard or download it as a file
What does code minification do?
Minification removes unnecessary characters from code — such as whitespace, comments, and newlines — without changing functionality. This reduces file size and improves page load speed.
Is my code safe? Does it get uploaded anywhere?
Completely safe. All minification happens 100% in your browser using JavaScript. No code is ever sent to any server. Your code stays private on your device.
Will minification break my code or change functionality?
No. Our minifier strictly follows industry standards. It only removes whitespace, comments, and redundant characters. The code logic and functionality remains identical after minification.
How much can minification reduce file size?
Typically 20–80% depending on the code. Well-commented and formatted code can see dramatic reductions. This directly improves your Google PageSpeed score and Core Web Vitals.
What is the Full Minifier (All) mode?
The Full Minifier lets you minify HTML, CSS, and JavaScript all at once in a single view — perfect for processing multiple files simultaneously without switching tabs.

Why Minify Your Code?

Code minification is an essential optimization technique for web developers. By removing whitespace, comments, and unnecessary characters from HTML, CSS, and JavaScript files, you can significantly reduce page load times, improve Core Web Vitals scores, and provide a better user experience.

Google's PageSpeed Insights and Lighthouse tools recommend minifying resources as one of the top performance improvements. Faster websites rank higher in search results, have lower bounce rates, and convert better — making code minification a crucial step in any web development workflow.

Our free online code minifier supports all three core web technologies: HTML minifier for markup optimization, CSS minifier for stylesheet compression, and JavaScript minifier for script optimization. Use it for any project — from simple websites to complex web applications.

`, css: `/* Main Stylesheet */ body { margin: 0px; padding: 0px; background-color: #ffffff; } .container { width: calc(100% - 20px); /* This calc function is now protected */ }`, js: `// Utility Functions function initApp(selector) { debugger; var element = document.querySelector(selector); // 'element' will be minified safely if (!element) { console.error("Element not found:", selector); return null; } // Notice the comment inside the regex is preserved now var trickyRegex = /https:\/\//g; return true; }` }; samples['all-html'] = samples.html; samples['all-css'] = samples.css; samples['all-js'] = samples.js;function loadSample(type) { const inputId = type.startsWith('all') ? type + '-input' : type + '-input'; const el = document.getElementById(inputId); if (el && samples[type]) { el.value = samples[type]; const prefix = inputId.replace('-input',''); const cid = prefix + '-in-count'; updateCount(inputId, cid); showToast('📄 Sample code loaded!', 'info'); } }// ── Toast ── function showToast(msg, type = 'info') { const tc = document.getElementById('toastContainer'); const t = document.createElement('div'); t.className = 'toast ' + type; t.textContent = msg; tc.appendChild(t); setTimeout(() => { if (t.parentNode) t.parentNode.removeChild(t); }, 3000); }// ── FAQ ── function toggleFaq(el) { el.parentElement.classList.toggle('open'); }// ── Keyboard shortcut (Ctrl+Enter = minify) ── document.addEventListener('keydown', (e) => { if ((e.ctrlKey || e.metaKey) && e.key === 'Enter') { const active = document.querySelector('.mode-tab.active'); if (active) { const mode = active.dataset.mode; if (mode === 'all') minifyAll(); else minifyCode(mode); } } });
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