Universal Code Minifier Online

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Universal Code Minifier — Minify CSS, JS, HTML, JSON, XML & SQL Online

Reduce file sizes, speed up your website, and improve load times with our free, all-in-one Universal Code Minifier. Supports CSS, JavaScript, HTML, JSON, XML and SQL.

Why use a Universal Code Minifier?

Minification removes unnecessary characters (comments, whitespace, line breaks) from source code without changing its behavior. This results in smaller files and faster network transfers — which improves page speed, user experience, and SEO. Our Universal Code Minifier handles multiple languages in one place so you don’t need separate tools for CSS, JS or JSON.

  • ✅ Faster load times — smaller files = quicker downloads.
  • ✅ Better SEO — improved Core Web Vitals and mobile performance.
  • ✅ One tool for many languages — CSS, JS, HTML, JSON, XML, SQL.
  • ✅ Easy to use — paste, minify, copy or download.

Features at a glance

  • Remove comments & collapse whitespace
  • Optional JavaScript obfuscation
  • Compression stats (original vs minified)
  • Copy output to clipboard or download
  • Preserve important formatting (configurable)
  • Safe for production use
  • Free — no signup required
  • Fast client-server processing

How to use the Universal Code Minifier

  1. Choose the language tab (CSS, JavaScript, HTML, JSON, XML, or SQL).
  2. Paste your code into the Input area.
  3. Toggle options like Remove Comments or Remove Whitespace. Use Obfuscate for JS if desired.
  4. Click Minify Now. View compression stats and copy or download the result.

Tip: Keep a non-minified copy for debugging. Minified code is harder to read but ideal for production.

Quick examples

CSS
/* before */ body { margin: 0; padding: 0; }
/* after */body{margin:0;padding:0}
JSON
/* before */ { "name": "Site", "version": "1.0.0" }
/* after */{"name":"Site","version":"1.0.0"}

Who should use this tool?

Web developers, site owners, front-end engineers, and hobbyists who want to speed up websites and reduce bandwidth costs. It’s ideal for both single-file minification and batch pre-deployment optimization when combined with your build process.

SEO & performance benefits

Smaller assets lower Time To First Byte (TTFB) and First Contentful Paint (FCP). Minified JS and CSS can significantly improve Core Web Vitals — a ranking factor used by search engines. Using the Universal Code Minifier helps you deliver lighter pages and a better user experience.

Frequently asked questions (FAQ)

Yes — minified code behaves the same as the original. Keep an unminified copy for debugging and use the minified version in production to improve performance.

Minification is not easily reversible. Always retain the original source code. You can use pretty-print tools to reformat minified files but variable names and comments are lost.

No — minification removes non-executable characters. If you use advanced obfuscation for JavaScript, that may rename symbols; use it with caution and test thoroughly.