# Rollup

Next-generation ES module bundler

Repository: https://github.com/rollup/rollup
Canonical: https://ross.abutalabs.com/products/rollup
Homepage: https://rollupjs.org
Language: JavaScript
License: NOASSERTION
License Family: other
Last push: 2026-08-25T13:06:07+00:00
Link (homepage): https://rollupjs.org
Link (site_page): https://rollupjs.org/faqs

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 4129, "days_push": 8, "days_rel": 8, "gap_med": 4, "n_releases_24m": 112}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 26306, forks 1766 (observed 2026-08-28T04:11:46.750523+00:00)

## What it is
Rollup is a JavaScript module bundler that compiles small ES modules into larger bundles for libraries and applications, with tree-shaking, code-splitting, and a plugin API. It is the bundler behind Vite and supports output formats like ES modules, CommonJS, UMD, and SystemJS.

## Use cases
- bundle a javascript library for npm
- tree-shake unused code from es modules
- build a browser iife bundle from modules
- code-split an app by dynamic imports
- set up a custom build pipeline with a plugin api

## When to choose
- you are publishing an ES module library and want minimal, tree-shaken output
- you need a configurable bundler with a rich plugin ecosystem
- you want standards-based ES module handling rather than CommonJS-first tooling

## When to avoid
- you need a batteries-included dev server and HMR out of the box (use Vite)
- your project is heavily CommonJS-based without plugin setup
- you need bundling for non-JavaScript assets with zero configuration

## Facets
- artifact type: library
- maturity: stable
- function: build-tool, cli, developer-tools
- domain: web-development, frontend, developer-tools
- platform: cli, cross-platform
- tags: bundler, es-modules, tree-shaking, code-splitting, javascript, nodejs

## Member repositories
- rollup/rollup (main) score 95
- rollup/plugins (plugin) score 70
- rollup/awesome (docs) score 74

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:46.750523+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T16:55:53.784742+00:00, confidence not recorded.
  - readme: https://github.com/rollup/rollup (fetched 2026-08-28T04:11:46.750523+00:00, sha c0484ec619e2)
  - homepage: https://rollupjs.org (fetched 2026-08-29T07:53:27.839248+00:00, sha b3231daaa707)
  - site_page: https://rollupjs.org/faqs (fetched 2026-08-29T07:53:27.848206+00:00, sha 737be6415e83)
- Data as of 2026-08-30T08:39:29.467469+00:00.