A pluggable and configurable linter tool for identifying and reporting on patterns in JavaScript. Maintain your code quality with ease.

ESLint's platform is a popular linting tool for JavaScript, offering insights into code quality, code style conventions, and static code analysis. Through documentation, tutorials, and configuration guides, ESLint offers insights into identifying and fixing common errors and code smells in JavaScript codebases. Developers can learn about ESLint rules, plugins, and integrations to maintain clean and consistent code across projects.

ESLint

ESLint expanded language support in 2025 with official CSS and HTML plugins, introduced multithreaded linting for 30-300% performance improvements, and integrated with AI tools like GitHub Copilot. Weekly npm downloads grew 65% to over 70 million. The project is preparing for v10.0.0, which drops Node.js <20.19.0 support and removes the legacy eslintrc system. ESLint received $204,452 in income against $262,150 in expenses, resulting in a $57,698 net loss as the team invested reserves into development. Major sponsors included Automattic, Airbnb, Meta, and AG Grid at $20-24k each.

ESLint's 2025 year in review

Updates to support the latest ECMAScript features