CSS Minifier

CSS Minifier is a fast, private, browser-based tool that compresses CSS files in real time. Paste your stylesheet, get a minified output instantly — no server, no upload, no waiting.

What It Does

CSS Minifier strips every byte that browsers don't need: comments, blank lines, redundant whitespace, and unnecessary semicolons before closing braces. The result is a smaller file that loads faster and costs less bandwidth, without changing how the stylesheet behaves.

Key Features

• Real-time minification — output updates as you type
• Comment removal — strips both /* block */ and inline comments
• Whitespace collapse — flattens indentation, newlines, and spacing around selectors and declarations
• Redundant character removal — drops trailing semicolons and unnecessary spaces around :, {, }
• Compression stats — shows original size, minified size, and percentage saved
• Copy to clipboard — one-click copy of the minified output
• Download as .css — save the result directly as a .css file
• 100% client-side — your CSS never leaves the browser

Tech Stack

Built with Next.js 16, TypeScript (strict mode), Tailwind CSS v4, Framer Motion for transitions, and shadcn/ui for accessible UI components. All minification logic runs in the browser using pure JavaScript — no third-party minification libraries, no backend.

Why We Built It

Build pipelines like webpack and Vite handle CSS minification automatically, but there are plenty of moments where you need a quick result without spinning up a project: auditing legacy stylesheets, checking what a snippet compresses to, or preparing a small static site without a build step. CSS Minifier covers those gaps in about five seconds.

Build Notes

Shipped in approximately 35 minutes. The core minification logic is a handful of regex passes chained together — comment stripping, whitespace normalization, and symbol cleanup — wrapped in a clean split-pane interface with live byte counts.