markuplint is a markup linter that helps developers improve the correctness, quality, and consistency of HTML and related markup.
It is designed for modern front-end workflows where teams need more than a basic validator, giving them a way to check conformance to web standards while also enforcing project-specific markup conventions. Its extensible architecture makes it suitable for component-driven development and broader markup review workflows.
This is free and open source software.
Key Features
- Checks markup conformance against specifications including HTML Standard, WAI-ARIA, and more.
- Lets you define project or organization specific linting policies and house rules.
- Validates designed structures, including attributes, properties, and parent-child element relationships.
- Can apply or ignore checks using selectors including CSS selectors and regular expression selectors.
- Supports template engines and frameworks through plugins, including JSX, Vue, Svelte, Astro, Alpine.js, HTMX, Pug, and PHP.
- Provides a Node.js CLI, a web playground, reusable packages, and a Visual Studio Code extension.
Website: github.com/markuplint/markuplint
Support:
Developer: Yusuke Hirao
License: MIT License
markuplint is written in TypeScript. Learn TypeScript with our recommended free books and free tutorials.
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