CSS GitHub Repositories (2026) · Open Source Tools

Class Variance Authority

emmet for vim: http://emmet.io/

A web component for visual art and creative coding

PHP library generating PDF files from UTF-8 encoded HTML

Free, open source (MIT) SVG icon library: 1,383 icons (1,671 SVGs with solid variants) for React, React Native, Vue, Solid, Flutter, CSS, Figma and Framer.

The essential toolkit for web-developers

Go minifiers for web formats

boxes and glue made easy - a PDF rendering library for Go using boxes and glue

Prettier is an opinionated code formatter.

The smallest, fastest, most feature complete Tailwind-in-JS solution in existence.

🍃 In short, it's like Tailwind CSS, but for the PHP command-line applications.

Ruby HTML and CSS sanitizer.

CSS & JavaScript minifier, in PHP. Removes whitespace, strips comments, combines files (incl. @import statements and small assets in CSS files), and optimizes/shortens a few common programming patterns.

A Parser for CSS Files written in PHP. Allows extraction of CSS files into a data structure, manipulation of said structure and output as (optimized) CSS

Framework for transforming Cascading Style Sheets (CSS) from Left-To-Right (LTR) to Right-To-Left (RTL)

Kotlin wrappers for popular JavaScript libraries

Firefox CSS Theme/Style for manual customization

A Python Library for Generating PDFs and Images from HTML, powered by PlutoBook

PSWriteHTML is PowerShell Module to generate beautiful HTML reports, pages, emails without any knowledge of HTML, CSS or JavaScript. To get started basics PowerShell knowledge is required.

Converts CSS styles into inline style attributes in your HTML code.