Bundle Size Analyzer is a free Chrome extension designed for developers, enabling quick access to the minified and gzipped sizes of npm packages. This tool integrates seamlessly with GitHub and npm pages, allowing users to view bundle sizes directly on package repositories and npm package pages. The extension features a user-friendly interface that prioritizes speed and clarity, making it easy to analyze package sizes on the fly through a convenient popup window.

Key features include real-time bundle size analytics, GitHub integration for automatic badge additions, and direct links to Bundlephobia for detailed reports. By using this extension, developers can optimize performance and make informed decisions about package dependencies without disrupting their workflow. The tool is completely free and open source, ensuring accessibility for all users.