Packagephobia
Claim this toolUnderstand the true cost of adding a new npm package to your project.
Visit WebsiteFreemiumVisit Website
Tracked since2026
0 reviews trackedThe Bottom Line
Entry price
Free plan available, paid tiers above
Biggest pro
Extremely fast and easy to use
Biggest con
Only provides size information, not other metrics like download count or security vulnerabilities
TL;DR - Packagephobia
- Checks install size of npm packages.
- Shows minified and gzipped sizes.
- Helps prevent bundle bloat.
Pricing: Free plan available
Best for: Growing teams
What is Packagephobia?
Packagephobia is a web-based tool designed to help developers understand the size impact of npm packages before installing them. It provides a quick and easy way to check the install size of any public npm package, both minified and gzipped, which is crucial for optimizing web application performance and bundle size. By visualizing the size, developers can make informed decisions about dependencies, avoiding bloat and improving load times for their users.
This tool is particularly useful for front-end developers, full-stack developers, and anyone working with JavaScript projects that rely heavily on npm packages. It helps in identifying large dependencies that might negatively affect performance, especially in environments where bundle size is critical, such as mobile web applications or single-page applications. Packagephobia promotes a more mindful approach to dependency management, encouraging developers to consider the 'cost' of each package beyond just its functionality.
Pros & Cons
Pros
- Extremely fast and easy to use
- Provides critical performance insights
- Helps in making informed dependency choices
- No installation required, web-based
- Supports a vast number of npm packages
Cons
- Only provides size information, not other metrics like download count or security vulnerabilities
- Relies on public npm registry data, so private packages are not supported
- No historical data or trend analysis for package sizes
Key Features
Instant package size lookupDisplays install size (unpacked)Displays minified sizeDisplays gzipped sizeSupports scoped packages
Pricing
Freemium
Packagephobia offers a generous free tier with optional paid upgrades for advanced features.
Reviews
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Packagephobia FAQ
How does Packagephobia help optimize web application performance?
Packagephobia helps optimize web application performance by allowing developers to check the install size of npm packages before adding them. This enables informed decisions about dependencies, which can prevent bloat and improve load times for users.
Which teams benefit most from using Packagephobia?
Front-end developers, full-stack developers, and anyone involved in JavaScript projects heavily reliant on npm packages benefit most from Packagephobia. It is particularly useful for teams focused on optimizing bundle size for mobile web applications or single-page applications.
What kind of information does Packagephobia provide about npm packages?
Packagephobia provides critical information about the install size of public npm packages, including both minified and gzipped sizes. This helps developers understand the performance impact of potential dependencies.
Can Packagephobia analyze private npm packages?
No, Packagephobia cannot analyze private npm packages because it relies on public npm registry data. It is designed to provide size information only for publicly available packages.
How is Packagephobia priced?
Packagephobia is available on a free tier, with additional paid plans offered for users requiring more usage or advanced features. This allows users to choose a plan that fits their specific needs.
Does Packagephobia offer insights beyond package size?
Packagephobia focuses specifically on providing package size information, such as minified and gzipped install sizes. It does not offer other metrics like download counts, security vulnerability assessments, or historical size trends.
Source: packagephobia.com