Performance

Minification

Removing spaces, comments and unneeded characters from code files to make them smaller.

By Nick Irmo · Updated

What Minification means

Minified CSS and JavaScript download faster without changing how the site works. Most modern build tools and performance plugins do this automatically. It is a small but standard optimization.

Why it matters for your website

Smaller code files download faster, which helps your pages load quickly on phones and slow connections. It's one of the easiest speed fixes because it doesn't change how your site looks or works. Most modern build tools and performance plugins can do it automatically.

Example

A craft brewery's site loads a large stylesheet full of comments and spacing. After minifying it, the file shrinks and the page renders a bit sooner.

Tips

  • Turn on minification in your build tool, caching plugin or host settings.
  • Combine minification with compression like Gzip or Brotli on your server.
  • Test key pages after turning it on, since minified scripts can occasionally break features.

Common mistakes

  • Editing minified files directly instead of the original source files.
  • Expecting minification alone to fix a slow site loaded with heavy images and scripts.

Questions about Minification

What is Minification?
Removing spaces, comments and unneeded characters from code files to make them smaller.
Does minification change how my website looks?
No. It only removes characters the browser doesn't need, like spaces and comments. If something breaks after minifying, it's usually a script conflict to fix.
Should I minify HTML too?
You can, but the savings are usually small compared with CSS and JavaScript. Server compression often matters more for HTML.

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