Browse free open source HTML/XHTML software and projects below. Use the toggles on the left to filter open source HTML/XHTML software by OS, license, language, programming language, and project status.
HTML to PDF converter for PHP
HTML, CSS and JS framework for developing responsive websites and apps
Tabler is free and open-source HTML Dashboard UI Kit
The granddaddy of HTML tools, with support for modern standards
Powerful rich text editor framework with a modular architecture
Open Source UI Kit built on top of Bootstrap 5 and plain JavaScript
The next generation Javascript WYSIWYG HTML Editor
The flexible HTTP client library for Elixir
A JS-independent, tree-shakeable CSS framework
Lexbor is development of an open source HTML Renderer library
Simple library that provides standard Unicode emoji for all platforms
From community websites to web applications, this CSS framework
Classic modular front-end UI framework
NES-style CSS Framework
Simple.css is a classless CSS template to make a good website
Turret is a styles and browser behaviour normalisation framework
Open Source HTML5 Web Audio Library
LaTeX.css is a library that makes your website look like a LaTeX doc
Create 3D web applications with HTML, bring a new depth to your DOM
Minimal CSS Framework for semantic HTML
The warehouse's SpringBoot-based rights management system
The fast & forgiving HTML and XML parser
Home of the MDN live code editor interactive examples