CSS / JS / HTML Minifier | Ultimate Design Tools

{/* Mode tabs */}

{MODES.map(m => ( ))}

{/* Stats */}

0 ? "rgba(0,255,209,0.04)" : "rgba(255,255,255,0.02)", border: `1px solid ${savedPct > 0 ? "rgba(0,255,209,0.1)" : "rgba(255,255,255,0.06)"}`, justifyContent: "center", flexWrap: "wrap", alignItems: "center" }}> {formatBytes(inputSize)} → {formatBytes(outputSize)} ↓ {savedPct}% smaller

{/* Input */}

Input ({mode.toUpperCase()}) {input.split("\n").length} lines · {formatBytes(inputSize)}

setInput(e.target.value)} placeholder={`Paste your ${mode.toUpperCase()} code...`} rows={10} style={{ width: "100%", padding: 14, borderRadius: 12, background: "rgba(255,255,255,0.03)", border: "1px solid rgba(255,255,255,0.06)", color: "rgba(255,255,255,0.7)", fontSize: 12, lineHeight: 1.6 }} />
        </div>

{/* Output */}
        <div>
          <div style={{ display: "flex", justifyContent: "space-between", marginBottom: 6 }}>
            <span style={{ fontSize: 12, fontWeight: 600, color: "rgba(255,255,255,0.5)" }}>Minified Output</span>
            <button className="dd-btn" onClick={() => copy(output, "min")} style={{ padding: "4px 12px", borderRadius: 6, fontSize: 11, fontWeight: 600, background: copied === "min" ? "rgba(0,255,209,0.12)" : "rgba(255,184,0,0.1)", border: `1px solid ${copied === "min" ? "rgba(0,255,209,0.25)" : "rgba(255,184,0,0.2)"}`, color: copied === "min" ? "#00FFD1" : "#FFB800" }}>
              {copied === "min" ? "✓ Copied" : "📋 Copy"}
            </button>
          </div>
          <div style={{ padding: 14, borderRadius: 12, background: "rgba(255,255,255,0.03)", border: "1px solid rgba(255,255,255,0.06)", maxHeight: 300, overflowY: "auto" }}>
            <pre style={{ fontFamily: "var(--font-mono)", fontSize: 11, color: "rgba(255,255,255,0.6)", lineHeight: 1.5, whiteSpace: "pre-wrap", wordBreak: "break-all" }}>{output || "..."}</pre>
          </div>
        </div>
      </div>
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                  <div style={{ fontFamily: "var(--font-display)", fontWeight: 700, fontSize: 14, marginBottom: 2 }}>Markdown Preview</div>
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}

const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(React.createElement(CodeMinifier));
</script>

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<article style="background:#0B0D17;color:#fff;font-family:'DM Sans',sans-serif;border-top:1px solid rgba(255,255,255,0.04)">
<div style="max-width:800px;margin:0 auto;padding:60px 20px">
<h2 style="font-family:var(--font-display);font-weight:800;font-size:22px;margin-bottom:16px;color:#fff">What Is Code Minification?</h2>
<p style="color:rgba(255,255,255,0.6);line-height:1.8;margin-bottom:24px">Code minification strips unnecessary characters from source code — whitespace, line breaks, comments, and redundant syntax — without changing how the code executes. The result is a smaller file that downloads faster, improving page load times and Core Web Vitals scores. This tool minifies CSS, JavaScript, and HTML.</p>

<h2 style="font-family:var(--font-display);font-weight:800;font-size:22px;margin-bottom:16px;color:#fff">Why Minify?</h2>
<p style="color:rgba(255,255,255,0.6);line-height:1.8;margin-bottom:24px">Every kilobyte matters for web performance. Minification typically reduces CSS by 20-30% and JavaScript by 30-50%. Combined with <strong style='color:rgba(255,255,255,0.8)'>gzip or Brotli compression</strong>, total transfer sizes can shrink by 70-90%. Google PageSpeed Insights specifically flags unminified code as an optimization opportunity.</p>

<h2 style="font-family:var(--font-display);font-weight:800;font-size:22px;margin-bottom:16px;color:#fff">How to Use This Code Minifier</h2>
<ol style="color:rgba(255,255,255,0.6);line-height:1.8;margin-bottom:40px;padding-left:20px">
<li style="margin-bottom:10px"><strong style="color:rgba(255,255,255,0.8)">Select the language</strong> — Choose CSS, JavaScript, or HTML from the language selector.</li>
<li style="margin-bottom:10px"><strong style="color:rgba(255,255,255,0.8)">Paste your code</strong> — Copy your source code into the input field. The tool handles any valid code in the selected language.</li>
<li style="margin-bottom:10px"><strong style="color:rgba(255,255,255,0.8)">Click Minify</strong> — The tool strips whitespace, removes comments, shortens variable names (for JS), and outputs the smallest possible version of your code.</li>
<li style="margin-bottom:10px"><strong style="color:rgba(255,255,255,0.8)">Copy the result</strong> — Click Copy to grab the minified output. Check the size reduction percentage to see how much you saved.</li>
</ol>

<h2 style="font-family:var(--font-display);font-weight:800;font-size:22px;margin-bottom:16px;color:#fff">Tips and Best Practices</h2>
<ul style="color:rgba(255,255,255,0.6);line-height:1.8;margin-bottom:40px;padding-left:20px;list-style:none">
<li style="margin-bottom:10px;padding-left:20px;position:relative"><span style="position:absolute;left:0;color:#00FFD1">→</span> <strong style="color:rgba(255,255,255,0.8)">Minify for production, not development.</strong> Always keep your original, readable source files for development. Minification is a build step that should happen automatically during deployment.</li>
<li style="margin-bottom:10px;padding-left:20px;position:relative"><span style="position:absolute;left:0;color:#00FFD1">→</span> <strong style="color:rgba(255,255,255,0.8)">Combine minification with Gzip.</strong> Minification removes syntax-level redundancy; Gzip compresses the remaining byte patterns. Together, they typically achieve 70–90% size reduction compared to raw source files.</li>
<li style="margin-bottom:10px;padding-left:20px;position:relative"><span style="position:absolute;left:0;color:#00FFD1">→</span> <strong style="color:rgba(255,255,255,0.8)">Use source maps in production.</strong> Source maps let you debug minified code in browser DevTools by mapping minified output back to your original source. Generate them during your build process.</li>
<li style="margin-bottom:10px;padding-left:20px;position:relative"><span style="position:absolute;left:0;color:#00FFD1">→</span> <strong style="color:rgba(255,255,255,0.8)">Don't minify already-minified code.</strong> Running minification twice offers zero additional savings and can occasionally break code. If a file ends in <code style="background:rgba(255,255,255,0.06);padding:2px 6px;border-radius:4px;font-family:var(--font-mono);font-size:0.9em">.min.js</code> or <code style="background:rgba(255,255,255,0.06);padding:2px 6px;border-radius:4px;font-family:var(--font-mono);font-size:0.9em">.min.css</code>, it's already minified.</li>
</ul>
<h2 style="font-family:var(--font-display);font-weight:800;font-size:22px;margin-bottom:16px;color:#fff">Frequently Asked Questions</h2>
<details style="margin-bottom:12px;border:1px solid rgba(255,255,255,0.06);border-radius:10px;overflow:hidden"><summary style="padding:16px 20px;cursor:pointer;font-weight:600;font-size:15px;color:rgba(255,255,255,0.8);background:rgba(255,255,255,0.02)">What is code minification?</summary><div style="padding:16px 20px;color:rgba(255,255,255,0.75);line-height:1.7;font-size:14px">Removing unnecessary characters (whitespace, comments, line breaks) without changing functionality. Reduces file size and improves page load speed.</div></details>
<details style="margin-bottom:12px;border:1px solid rgba(255,255,255,0.06);border-radius:10px;overflow:hidden"><summary style="padding:16px 20px;cursor:pointer;font-weight:600;font-size:15px;color:rgba(255,255,255,0.8);background:rgba(255,255,255,0.02)">Should I minify CSS and JavaScript?</summary><div style="padding:16px 20px;color:rgba(255,255,255,0.75);line-height:1.7;font-size:14px">Yes — it's a standard production optimization reducing sizes by 20-50%. Always serve minified code in production; keep originals for development.</div></details>
<details style="margin-bottom:12px;border:1px solid rgba(255,255,255,0.06);border-radius:10px;overflow:hidden"><summary style="padding:16px 20px;cursor:pointer;font-weight:600;font-size:15px;color:rgba(255,255,255,0.8);background:rgba(255,255,255,0.02)">Minification vs compression?</summary><div style="padding:16px 20px;color:rgba(255,255,255,0.75);line-height:1.7;font-size:14px">Minification removes unnecessary characters. Compression (gzip/Brotli) encodes files for smaller transfer. They're complementary — minify first, then compress. Together: 70-90% smaller.</div></details>
<details style="margin-bottom:12px;border:1px solid rgba(255,255,255,0.06);border-radius:10px;overflow:hidden"><summary style="padding:16px 20px;cursor:pointer;font-weight:600;font-size:15px;color:rgba(255,255,255,0.8);background:rgba(255,255,255,0.02);list-style:none;display:flex;align-items:center;justify-content:space-between">What is the difference between minification and compression?<span style="color:rgba(255,255,255,0.2);font-size:18px">+</span></summary><div style="padding:16px 20px;color:rgba(255,255,255,0.75);line-height:1.7;font-size:14px">Minification removes unnecessary characters from source code (whitespace, comments, long variable names) to produce smaller but still valid code. Compression (like Gzip or Brotli) is a server-level process that compresses the file's bytes for transfer. They work together — minify your code first, then serve it with compression enabled.</div></details>
<details style="margin-bottom:12px;border:1px solid rgba(255,255,255,0.06);border-radius:10px;overflow:hidden"><summary style="padding:16px 20px;cursor:pointer;font-weight:600;font-size:15px;color:rgba(255,255,255,0.8);background:rgba(255,255,255,0.02);list-style:none;display:flex;align-items:center;justify-content:space-between">Does minification affect performance?<span style="color:rgba(255,255,255,0.2);font-size:18px">+</span></summary><div style="padding:16px 20px;color:rgba(255,255,255,0.75);line-height:1.7;font-size:14px">Yes, positively. Smaller file sizes mean faster downloads, reduced bandwidth costs, and quicker parse times. For JavaScript, minification can significantly reduce parse and compile time on slower devices.</div></details>
<details style="margin-bottom:12px;border:1px solid rgba(255,255,255,0.06);border-radius:10px;overflow:hidden"><summary style="padding:16px 20px;cursor:pointer;font-weight:600;font-size:15px;color:rgba(255,255,255,0.8);background:rgba(255,255,255,0.02);list-style:none;display:flex;align-items:center;justify-content:space-between">Can minified code be reversed?<span style="color:rgba(255,255,255,0.2);font-size:18px">+</span></summary><div style="padding:16px 20px;color:rgba(255,255,255,0.75);line-height:1.7;font-size:14px">Minification is partially reversible — code beautifiers can restore formatting and whitespace, but they cannot recover original variable names, comments, or documentation. This is called prettifying or beautifying, and our <a href="/tools/code-beautifier/" style="color:#00FFD1;text-decoration:none">Code Beautifier</a> tool can help.</div></details>

<div style="margin-top:24px;padding:0 20px 20px">
        <h3 style="font-size:16px;font-weight:700;color:rgba(255,255,255,0.7);margin-bottom:12px">📖 Learn More</h3>
        <a href="/blog/code-formatting-guide/" style="display:block;padding:16px 20px;background:rgba(0,255,209,0.04);border:1px solid rgba(0,255,209,0.12);border-radius:10px;text-decoration:none;margin-bottom:8px;transition:all 0.2s">
          <span style="font-size:11px;text-transform:uppercase;letter-spacing:1px;color:rgba(0,255,209,0.7);font-weight:600">Related Article</span>
          <span style="display:block;font-size:15px;color:rgba(255,255,255,0.85);font-weight:600;margin-top:4px">The Complete Guide to Code Formatting and Minification →</span>
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<script type="application/ld+json">{"@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{"@type": "Question", "name": "What is code minification?", "acceptedAnswer": {"@type": "Answer", "text": "Removing unnecessary characters (whitespace, comments, line breaks) without changing functionality. Reduces file size and improves page load speed."}}, {"@type": "Question", "name": "Should I minify CSS and JavaScript?", "acceptedAnswer": {"@type": "Answer", "text": "Yes \u2014 it's a standard production optimization reducing sizes by 20-50%. Always serve minified code in production; keep originals for development."}}, {"@type": "Question", "name": "Minification vs compression?", "acceptedAnswer": {"@type": "Answer", "text": "Minification removes unnecessary characters. Compression (gzip/Brotli) encodes files for smaller transfer. They're complementary \u2014 minify first, then compress. Together: 70-90% smaller."}}, {"@type": "Question", "name": "What is the difference between minification and compression?", "acceptedAnswer": {"@type": "Answer", "text": "Minification removes unnecessary characters from source code (whitespace, comments, long variable names) to produce smaller but still valid code. Compression (like Gzip or Brotli) is a server-level process that compresses the file's bytes for transfer. They work together \u2014 minify your code first, then serve it with compression enabled."}}, {"@type": "Question", "name": "Does minification affect performance?", "acceptedAnswer": {"@type": "Answer", "text": "Yes, positively. Smaller file sizes mean faster downloads, reduced bandwidth costs, and quicker parse times. For JavaScript, minification can significantly reduce parse and compile time on slower devices."}}, {"@type": "Question", "name": "Can minified code be reversed?", "acceptedAnswer": {"@type": "Answer", "text": "Minification is partially reversible \u2014 code beautifiers can restore formatting and whitespace, but they cannot recover original variable names, comments, or documentation. This is called prettifying or beautifying, and our Code Beautifier tool can help."}}]}</script>

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