Bundles JavaScript with tree shaking for clean, optimized output
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676 reviews trackedThe Bottom Line
Entry price
Free, no paid tier
Biggest pro
Good for libraries
Biggest con
Vite often preferred
TL;DR - Rollup
- Rollup is a module bundler for JavaScript that uses ES modules
- It creates optimized bundles for libraries and applications
- Completely free and open-source
Pricing: Free forever
Best for: Individuals & startups
4.4/5 across review platforms
What is Rollup?
Rollup bundles JavaScript with tree shaking. Module bundler for library authors-bundling that produces clean output.
The tree shaking works well. The library use case is strong. The output is optimized.
JavaScript library authors often use Rollup for clean, shaken bundles.
Available on: Web
Pros & Cons
Pros
- Good for libraries
- Tree shaking
- Plugin ecosystem
- ES modules focus
- Active development
Cons
- Vite often preferred
- Configuration needed
- Less features than Webpack
- Learning curve
- Build times
Ratings Across the Web
4.4(676 reviews)
Ratings aggregated from independent review platforms. Learn more
Key Features
JS bundlerES modulesTree-shakingCode splittingPluginsOpen source
Pricing Plans
Pricing checked Jul 5, 2026
Free
Free
- 100% free and open source
- MIT license
- ES module bundler
- Tree-shaking
- Plugin ecosystem
- Community support
Reviews
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4.4/5
Across 676 verified user reviews on G2, Capterra
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Rollup FAQ
How does Rollup optimize JavaScript output?
Rollup optimizes JavaScript output by bundling code with tree shaking, which removes unused code. This process results in clean and optimized bundles, particularly beneficial for library authors.
Which teams benefit most from using Rollup?
Teams developing JavaScript libraries will find Rollup particularly beneficial due to its strong support for library use cases. Its ability to produce clean, tree-shaken bundles is ideal for this purpose.
How is Rollup priced?
Rollup is free to use, meaning there is no paid plan required to access its features. It is an open-source tool available for bundling JavaScript.
Can Rollup be extended with additional functionalities?
Yes, Rollup can be extended through its plugin ecosystem, which allows users to add various functionalities. This ecosystem contributes to its active development and adaptability.
What kind of trade-offs should users consider when choosing Rollup?
Users should consider that Rollup requires configuration and has a learning curve. It also offers fewer features compared to Webpack and may have longer build times in certain scenarios.
How does Rollup compare to Webpack for bundling JavaScript?
Rollup focuses on bundling JavaScript with tree shaking for clean, optimized output, especially for libraries, while Webpack generally offers a broader set of features. Rollup may have fewer features than Webpack, but it excels in producing optimized bundles for library authors.
Source: rollupjs.org