Best Open Source html Libraries
A curated list of the most popular GitHub repositories tagged with html. Select any project to visualize its architecture and dive into the codebase using RepoMind's AI engine.
#1twbs/bootstrap
The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.
#2Chalarangelo/30-seconds-of-code
Coding articles to level up your development skills
#3electron/electron
:electron: Build cross-platform desktop apps with JavaScript, HTML, and CSS
#4microsoft/Web-Dev-For-Beginners
24 Lessons, 12 Weeks, Get Started as a Web Developer
#5florinpop17/app-ideas
A Collection of application ideas which can be used to improve your coding skills.
#6storybookjs/storybook
Storybook is the industry standard workshop for building, documenting, and testing UI components in isolation
#7thedaviddias/Front-End-Checklist
🗂 The perfect Front-End Checklist for modern websites and meticulous developers
#8rails/rails
Ruby on Rails
#9h5bp/html5-boilerplate
A professional front-end template for building fast, robust, and adaptable web apps or sites.
#10docling-project/docling
Get your documents ready for gen AI
#11prettier/prettier
Prettier is an opinionated code formatter.
#12jgthms/bulma
Modern CSS framework based on Flexbox
#13bigskysoftware/htmx
</> htmx - high power tools for HTML
#14Asabeneh/30-Days-Of-JavaScript
30 days of JavaScript programming challenge is a step-by-step guide to learn JavaScript programming language in 30 days. This challenge may take more than 100 days, please just follow your own pace. These videos may help too: https://www.youtube.com/channel/UC7PNRuno1rzYPb1xLa4yktw
#15ColorlibHQ/AdminLTE
AdminLTE - Free admin dashboard template based on Bootstrap 5
#16vercel/hyper
A terminal built on web technologies
#17NaiboWang/EasySpider
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/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。
#18parcel-bundler/parcel
The zero configuration build tool for the web. 📦🚀
#19yangshun/front-end-interview-handbook
Front End interview preparation materials for busy engineers (updated for 2026)
#20tabler/tabler
Tabler is free and open-source HTML Dashboard UI Kit built on Bootstrap
#21videojs/video.js
Video.js - open source HTML5 video player
#22QuivrHQ/quivr
Opiniated RAG for integrating GenAI in your apps 🧠 Focus on your product rather than the RAG. Easy integration in existing products with customisation! Any LLM: GPT4, Groq, Llama. Any Vectorstore: PGVector, Faiss. Any Files. Anyway you want.
#23SheetJS/sheetjs
📗 SheetJS Spreadsheet Data Toolkit -- New home https://git.sheetjs.com/SheetJS/sheetjs
#24DioxusLabs/dioxus
Fullstack app framework for web, desktop, and mobile.
#25layui/layui
一套遵循浏览器原生态开发模式的 Web UI 组件库。
#26joshbuchea/HEAD
A simple guide to HTML <head> elements
#27cheeriojs/cheerio
The fast, flexible, and elegant library for parsing and manipulating HTML and XML.
#28qianguyihao/Web
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。
#29Asabeneh/30-Days-Of-React
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/channel/UC7PNRuno1rzYPb1xLa4yktw
#30koodo-reader/koodo-reader
A modern ebook manager and reader with sync and backup capacities for Windows, macOS, Linux, Android, iOS and Web
#31haizlin/fe-interview
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/ECMAScritpt/Webpack/Jquery/小程序/软技能……
#32pyscript/pyscript
An open source platform for Python in the browser. https://pyscript.net Docs: https://docs.pyscript.net/ Try it: https://pyscript.com/ Community: https://discord.gg/HxvBtukrg2
#33nhn/tui.editor
🍞📝 Markdown WYSIWYG Editor. GFM Standard + Chart & UML Extensible.
#34aframevr/aframe
:a: Web framework for building virtual reality experiences.
#35kitao/pyxel
A retro game engine for Python
#36thedaviddias/Front-End-Performance-Checklist
🎮 The only Front-End Performance Checklist that runs faster than the others
#37cure53/DOMPurify
DOMPurify - a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMPurify works with a secure default, but offers a lot of configurability and hooks. Demo:
#38arthurspk/guiadevbrasil
Um guia extenso de informações com um vasto conteúdo de várias áreas para ajudar, agregar conhecimento e retirar dúvidas, nesse guia você encontrará tudo que necessário para qualquer carreira relacionada a tecnologia.
#39ionic-team/capacitor
Build cross-platform Native Progressive Web Apps for iOS, Android, and the Web ⚡️
#40showdownjs/showdown
A bidirectional Markdown to HTML to Markdown converter written in Javascript
#41StartBootstrap/startbootstrap-sb-admin-2
A free, open source, Bootstrap admin theme created by Start Bootstrap
#42whatwg/html
HTML Standard
#43themesberg/flowbite
Open-source UI component library and front-end development framework based on Tailwind CSS
#44beautifier/js-beautify
Beautifier for javascript
#45OnsenUI/OnsenUI
Mobile app development framework and SDK using HTML5 and JavaScript. Create beautiful and performant cross-platform mobile apps. Based on Web Components, and provides bindings for Angular 1, 2, React and Vue.js.
#46tsparticles/tsparticles
tsParticles - Easily create highly customizable JavaScript particles effects, confetti explosions and fireworks animations and use them as animated backgrounds for your website. Ready to use components available for React.js, Vue.js (2.x and 3.x), Angular, Svelte, jQuery, Preact, Inferno, Solid, Riot and Web Components.
#47Kozea/WeasyPrint
The awesome document factory
#48TiddlyWiki/TiddlyWiki5
A self-contained JavaScript wiki for the browser, Node.js, AWS Lambda etc.
#49heygen-com/hyperframes
Write HTML. Render video. Built for agents.
#50kevquirk/simple.css
Simple.css is a CSS template that allows you to make a good looking website really quickly.