5 min read
2026-03-01
Before publishing a website, CSS minification is a mandatory step. Reducing file sizes directly impacts Core Web Vitals.
Email clients limit the size of HTML emails. Minified inline styles help to stay within limits.
In older projects, CSS often contains a lot of comments and unused styles. Minification helps reduce volume without refactoring.
Widgets for third-party sites should be as lightweight as possible. CSS minification is critical to loading them.
| Script | Savings |
|---|---|
| Simple landing page | 25–35% |
| SPA application | 30–40% |
| Framework (Bootstrap) | 40–60% |
| Email template | 15–25% |
Highlight critical styles for the first screen, minify them, and inline them in HTML for maximum speed.
See also: HTML Formatter, JS Beautifier, Grid Playground