Quicker

Code Minifier

Minify JavaScript, CSS, and HTML online for free. Removes comments and collapses whitespace to reduce file size — no external packages, runs entirely in your browser.

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How to Use

  1. Select the language

    Click JS, CSS, or HTML to choose the type of code you want to minify.

  2. Paste your code

    Paste the source code into the input area. The minified output appears automatically below.

  3. Copy the result

    Click "Copy" to copy the minified code. The reduction percentage shows how much smaller the output is.

FAQ

It removes comments (// and /* */ for JS, /* */ for CSS, <!-- --> for HTML) and collapses multiple whitespace characters into a single space. It does not rename variables, tree-shake, or perform advanced optimizations.

For CSS and HTML, yes — the transformations are safe. For JavaScript, the light minification is generally safe, but avoid using it as a replacement for a full bundler (Webpack, Vite, etc.) in production. Template literals with complex nested expressions may not be handled correctly.

If your code has few comments and is already compactly written, the reduction will be small. This tool only removes whitespace and comments — it cannot rename variables or apply advanced compression.

In almost all cases, yes. The exceptions are JavaScript relying on comment-based annotations (e.g., some Angular/legacy build tools) or HTML where whitespace inside <pre> is significant.