⚡ HTML CSS JavaScript Minifier

Minify HTML, CSS, and JavaScript into compact code for testing, build handoffs, and production preparation.

Free Instant results No sign-up needed
input.js
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output.min.js

Click Minify to see compressed output here.

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JS:
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HTML:

Three tabs—HTML, CSS, JavaScript—with CodeMirror on the left and minified output on the right. JavaScript passes through Terser in the browser when the CDN script loads; HTML and CSS use built-in compressors. A stats bar shows bytes saved. Nothing is uploaded to Nexora.

Workflow

  1. Open the language tab that matches your snippet.
  2. Paste, drop a file, or load the built-in sample.
  3. Click Minify or press Ctrl+Enter.
  4. Copy or download the output, then run it in your real build or browser before shipping.

What minify actually removes

  • HTML/CSS: comments and extra whitespace where safe.
  • JS: whitespace, comments, and some dead code paths via Terser—not a full bundler or tree-shaker.

Production caution

Minified code is harder to debug. Source maps are not generated here. Always keep an unminified copy in version control and test minified assets in the environment where they will run.

Processing

CodeMirror and Terser load from CDNs. Your source stays in the tab unless a browser extension reads the DOM.

Minifier questions

What is minification?

Minification removes unnecessary characters such as whitespace, comments, and formatting so code can be represented more compactly.

Does minification improve website performance?

Minification can reduce transfer size, but real performance depends on caching, compression, network conditions, and how the code is loaded.

Can I minify HTML?

Yes. Choose the HTML tab and run the minifier to compact supported HTML input.

Can I minify CSS?

Yes. Choose the CSS tab to remove unnecessary whitespace and comments from CSS where the tool can do so safely.

Can I minify JavaScript?

Yes. The JavaScript mode uses Terser in the browser when the library is available.

Does minification change functionality?

It should preserve behavior for valid compatible code, but you should test minified output before using it in production.

Related Developer

If you need a neighbouring step in the same workflow, these pages are the closest match: JSON Formatter, Text Compare, Markdown Editor. Browse the full Developer set or the all tools hub.