About Bundlephobia
Overview
Bundlephobia is a tool that analyzes npm packages and measures their performance impact on your JavaScript bundle size. It helps developers understand the cost of adding new dependencies before installation.
JavaScript applications tend to grow larger as developers add more libraries to solve problems, often resulting in bloated bundles. Bundlephobia addresses this by letting you evaluate package size, composition, and exports upfront, preventing unnecessary bloat.
Key Benefits
- Analyze size impact of any npm package before adding it to your bundle
- Review package composition and exports to understand what you are importing
- Scan package.json files to evaluate total dependency impact
- Prevent bundle bloat by making informed dependency decisions early
- Free tool with no installation or signup required
How It Works
Search for any npm package by name, or upload your package.json file to scan all dependencies at once. The tool displays the package size, composition breakdown, and export details so you can assess the performance cost before running npm install.
Use Cases
- Frontend developers evaluating whether to add a new npm package to an existing project
- Engineering teams reviewing pull requests that introduce new dependencies
- Performance-conscious developers optimizing bundle size in their applications
- Library maintainers checking their own package size and exports
Why Choose This Product
Bundlephobia is best suited for developers who care about bundle performance and want visibility into dependency costs before committing. The tool is free and requires no installation or signup, making it easy to quickly check any package.
Bundlephobia Pros & Cons
- Analyze any npm package size before installation
- Scan entire package.json files for dependency impact
- Free to use with no signup required
- Shows package composition and exports breakdown
Key Features
Package Search
Search any npm package by name to view its bundle size and impact.
Size Analysis
Displays the minified and gzipped size of packages to understand performance cost.
Composition Breakdown
Shows the internal structure and composition of a package.
Export Analysis
Reviews exported modules and APIs within a package.
package.json Scanning
Upload package.json files to analyze all dependencies at once.
Bundlephobia Pricing
Pricing extracted from the product website and may change. Check the source for current details.
Frequently asked questions about Bundlephobia
What does Bundlephobia do?
Bundlephobia helps you understand the performance cost of installing npm packages before they become part of your bundle. You can analyze package size, compositions, and exports to make informed decisions about dependencies.
How do I use Bundlephobia?
You can search for any npm package by name, or scan your package.json file to evaluate all dependencies at once. The tool displays size data and composition details to help you assess impact.
Is Bundlephobia free?
Yes — Bundlephobia is free to use. See the pricing section for any optional add-ons.
What platforms does Bundlephobia support?
Bundlephobia is available on: Web.