HTML, or Hypertext Markup Language, is the foundational building block for creating and structuring content on the web. It provides the basic framework by allowing developers to define elements such as headings, paragraphs, links, images, and more through a system of tags and attributes. HTML is not a programming language, as it lacks logic and processing abilities; rather, it is a markup language that describes the semantics of content in a document. Modern HTML5, the latest version, offers rich media support, improved accessibility features, and enhanced web performance capabilities through native APIs like video, audio, and canvas. For application developers, mastering HTML is crucial for creating accessible and SEO-friendly web pages, and for working seamlessly in concert with other technologies like CSS and JavaScript to build dynamic, interactive applications. Understanding HTML's document structure, elements, and their proper nesting within a DOM is vital in crafting well-organized websites and applications that behave predictably across different browsers and devices.
View the most prominent open source HTML projects in the list below. Click on a specific project to view its alternative or complementary packages. Make comparisons and find the best package for your app.
- The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.☆174,965Updated this week
- Coding articles to level up your development skills☆129,378Updated this week
- Build cross-platform desktop apps with JavaScript, HTML, and CSS☆123,664Updated this week
- A Collection of application ideas which can be used to improve your coding skills.☆98,421Oct 11, 2025Updated last year
- 24 Lessons, 12 Weeks, Get Started as a Web Developer☆97,054Oct 20, 2026Updated last week
- Storybook is the industry standard workshop for building, documenting, and testing UI components in isolation☆91,417Updated this week
- Write HTML. Render video. Built for agents.☆76,579Updated this week
- 🗂 The essential checklist for modern web development, for humans and AI agents☆74,612Updated this week
- Get your documents ready for gen AI☆69,919Updated this week
- Ruby on Rails☆58,852Updated this week
- A professional front-end template for building fast, robust, and adaptable web apps or sites.☆57,656Oct 12, 2026Updated 2 weeks ago
- Prettier is an opinionated code formatter.☆52,389Updated this week
- Modern CSS framework based on Flexbox☆50,035Sep 21, 2026Updated last month
- </> htmx - high power tools for HTML☆49,575Updated this week
- 30 days of JavaScript programming challenge is a step-by-step guide to learn JavaScript programming language in 30 days. This challenge m…☆46,977Aug 27, 2026Updated 2 months ago
- AdminLTE - Free admin dashboard template based on Bootstrap 5☆45,669Updated this week
- A terminal built on web technologies☆44,763Aug 21, 2026Updated 2 months ago
- A visual no-code/code-free web crawler/spider易采集:一个可视化浏览器自动化测试/数据采集/网页爬虫软件,可以无代码图形化的设计和执行爬虫任务。别名:ServiceWrapper面向Web应用的智能化服务封装系统。☆44,757Updated this week
- The zero configuration build tool for the web. 📦🚀☆44,011Updated this week
- Front End interview preparation materials for busy engineers (updated for 2026)☆44,006Oct 5, 2026Updated 3 weeks ago
- Free and open source admin dashboard UI kit built on Bootstrap: 100+ pages, 6,000+ icons, dark mode, RTL.☆41,981Updated this week
- Video.js v10 - open source media player framework for HTML and React.☆40,052Updated this week
- An open-source engine that turns continuous content streams into search and monitoring. Durable ingestion, hybrid search, alerts, and plu…☆39,625Updated this week
- Fullstack app framework for web, desktop, and mobile.☆39,556Updated this week
- 📗 SheetJS Spreadsheet Data Toolkit -- New home https://git.sheetjs.com/SheetJS/sheetjs☆36,348Apr 18, 2024Updated 2 years ago
- Create beautiful slides on the web using a coding agent's frontend skills☆31,642Jun 23, 2026Updated 4 months ago
- 一套遵循 浏览器原生态开发模式的 Web UI 组件库。☆30,587Updated this week
- The fast, flexible, and elegant library for parsing and manipulating HTML and XML.☆30,541Updated this week
- A simple guide to HTML <head> elements☆30,272May 28, 2026Updated 5 months ago
- PDF Parser for AI-ready data. Automate PDF accessibility. Open-source.☆30,131Updated this week
- A CSS-first, native, zero-build layout and styling framework for web designers.☆29,804Oct 14, 2026Updated 2 weeks ago
- 千古前端图文教程,超详细的前端入门到进阶知识库。从零开始学前端,做一名精致优雅的前端工程师。☆28,679Dec 8, 2025Updated 10 months ago
- A modern ebook manager and reader with sync and backup capacities for Windows, macOS, Linux, Android, iOS and Web☆28,680Updated this week
- Huashu Design 3.0 · 在 agent 里打一句话,拿回能交付的设计:网页 / App 原型 / 可编辑 PPTX / 动画 / 信息图 · 六个候选挑三个方向 · 84 种带样张的风格库 · 越用越懂你的外观账本与设计体检 · HTML-native de…☆28,293Updated this week
- 30 Days of React challenge is a step by step guide to learn React in 30 days. These videos may help too: https://www.youtube.com/channe…☆27,522Aug 27, 2026Updated 2 months ago
- 前端面试每日 3+1,以面试题来驱动学习,提倡每日学习与思考,每天进步一点!每天早上5点纯手工发布面试题(死磕自己,愉悦大家),6000+道前端面试题全面覆盖,HTML/CSS/JavaScript/Vue/React/Nodejs/TypeScript/ECMAScrit…☆26,261Oct 26, 2025Updated last year
- p5.js is a client-side JS platform that empowers artists, designers, students, and anyone to learn to code and express themselves creativ…☆24,281Updated this week
- Bootstrap 5 & Material Design UI KIT☆24,242Mar 24, 2026Updated 7 months ago
- A set of small, responsive CSS modules that you can use in every web project.☆23,712Updated this week
- Lightweight, user-friendly onboarding tour library☆23,455Sep 21, 2026Updated last month