Analyze JavaScript bundle sizes and optimize your dependencies
Minified and gzipped size estimates
Estimated download time
Identify lazy-loadable packages
Compare multiple packages
Download analysis results
Get improvement suggestions
Bundle size directly impacts your application's performance. Smaller bundles load faster, improving user experience and SEO rankings.
Code with unnecessary characters removed. Reduces file size by 30-50%.
Minified code compressed with gzip. Further reduces by 60-70%.
Estimated time to download bundle on 4G connection.
Potential size reduction by lazy loading non-critical code.
Bundle size is the total size of your JavaScript code after minification and compression.
Minified removes unnecessary characters. Gzipped compresses the minified code further for transfer.
Lazy loading defers loading non-critical code until needed, reducing initial bundle size.
Aim for under 100 KB gzipped for optimal performance. Larger bundles increase load times.
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