A JavaScript module bundler that compiles small pieces of code into larger, optimized bundles.
Rollup is a JavaScript module bundler designed to optimize code by compiling small modules into efficient bundles. It is widely used in web3 and decentralized application development to streamline and optimize smart contract front-end and tooling code. Rollup supports modern JavaScript features and tree-shaking to eliminate unused code, improving performance and reducing bundle size.
The tool is intended for developers building web3 applications who need a reliable bundler that integrates well with modern JavaScript workflows. It requires Node.js and npm for installation and can be configured via a straightforward config file. Rollup also offers a REPL (Read-Eval-Print Loop) environment accessible via the official website, allowing developers to experiment with bundling code snippets and share them via GitHub gists.
What sets Rollup apart is its focus on producing smaller, more efficient bundles compared to alternatives like Webpack, especially for libraries and modular codebases common in web3 projects. Its plugin system and active community support make it adaptable for various build needs. The official documentation and guides are maintained in the main Rollup GitHub repository, ensuring up-to-date resources for developers.
To get started, developers can clone the rollupjs.org repository, install dependencies with npm, and run the local development server. The guide content is maintained as a submodule linked to the main Rollup repo, allowing contributors to update documentation alongside code. The REPL feature supports loading code from GitHub gists, facilitating easy sharing and testing of module bundles.
Developers face challenges in efficiently bundling modular JavaScript code for web3 applications, often resulting in large, unoptimized bundles that degrade performance. Managing dependencies and eliminating unused code manually is error-prone and time-consuming.
Explore web3 competitors and apps like Rollup Platform.

Open Source | |
|---|---|
| Price (Monthly) | Free |
| Price (Annual) | Free |
| Messaging | N/A |
| Support | Community support via GitHub |
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Reliable RPC, powerful APIs, and zero hassle.
Rollup provides comprehensive documentation and an interactive REPL environment to help developers learn and test bundling configurations. The docs are maintained in the main Rollup GitHub repository and synchronized with the website via a submodule.
Native support for ES modules enables modern JavaScript syntax and modular codebases.
Documentation is maintained as a submodule linked to the main repo, ensuring synchronized updates.
Easy setup for local development with live reloading and guide updates.
Developers use Rollup to bundle and optimize JavaScript code for decentralized applications, reducing load times and improving user experience.
Library authors leverage Rollup's tree-shaking and ES module support to create lightweight, reusable web3 SDKs and tools.
Developers use the Rollup REPL to test bundling configurations and share code snippets via GitHub gists for collaboration.
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