HTML GitHub Repositories (2026) · Open Source Tools

Beautifier for javascript

Storybook is the industry standard workshop for building, documenting, and testing UI components in isolation

Secure and speedy templates for Java and Kotlin.

Free, open source mental health communication web app to share experiences with loved ones

:sparkles: Mojolicious - Perl real-time web framework

Turn Off the Lights Browser extension for Google Chrome, Firefox, Opera, Safari, Naver Whale, Yandex, Samsung Internet, and Microsoft Edge.

A bidirectional Markdown to HTML to Markdown converter written in Javascript

This project is waiting for your contribution. If you have never contributed code on GitHub before, this is the project to get you started.

Juice inlines CSS stylesheets into your HTML source.

Configurable HTML, Vue, Svelte, Astro, Angular, Jinja, Twig, Nunjucks, Vento, Mustache, Handlebars and XML formatter with dprint integration.

An HTML linter for all markup developers.

Fast and lightweight HTML/CSS rendering engine

Fast library for rendering HTML in Clojure

⚙️ The static code analysis tool you need for your HTML

Highly effective, super-configurable, well-tested web page minifier (enhanced successor to HTML Minifier)

jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.

A blazing fast type-checked HTML macro crate.

Contextual output encoding for Java 8+: HTML, JavaScript, CSS, XML and URI components. Zero-dependency core with optional JSP and Jakarta adapters.

DOMjudge programming contest jury system

HTML template formatter and linter for Django, Jinja, Twig, Nunjucks, Handlebars, Mustache, Liquid, Go templates, Angular, Tera, Askama and Mako. Formats markup and template syntax together, and lints for accessibility, correctness and style. CLI, pre-commit hook and VS Code extension.