# Rolldown, release history and use on real websites.

A bundler written in Rust with a Rollup-compatible API. It is being built as the future core of Vite so that the dev server and the production build use the same fast tool.

- **Status:** Modern. A young project by the Vite team; becoming the default bundler step by step from Vite 7.
- **Category:** [Build Tools](https://be1st.ai/technologies/build)
- **First release:** 2023
- **License:** MIT
- **Latest version:** 1.3.0 (5 Nov 2026)
- **Official website:** https://rolldown.rs
- **Documentation:** https://rolldown.rs/guide/getting-started
- **GitHub:** https://github.com/rolldown/rolldown
- **Page:** https://be1st.ai/technologies/build/rolldown

## Rolldown on audited websites

44 of the 16,845 websites audited by be1st run Rolldown (<1%). That ranks it #6 of the 7 technologies in Build Tools we have seen in audits.

### Websites running Rolldown vs all websites

- **Web score:** 75 (all websites 72)
- **SEO:** 76 (all websites 79)
- **Security:** 64 (all websites 59)
- **Performance:** 87 (all websites 72)
- **AI Readiness:** 28 (all websites 31)

### Most used in Build Tools

1. [Webpack](https://be1st.ai/technologies/build/webpack): 22% (3,765)
2. [Vite](https://be1st.ai/technologies/build/vite): 15% (2,476)
3. [Turbopack](https://be1st.ai/technologies/build/turbopack): 13% (2,140)
4. [esbuild](https://be1st.ai/technologies/build/esbuild): 7.6% (1,287)
5. [Parcel](https://be1st.ai/technologies/build/parcel): <1% (82)
6. [Rolldown](https://be1st.ai/technologies/build/rolldown): <1% (44)
7. [Rollup](https://be1st.ai/technologies/build/rollup): <1% (8)

## Rolldown versions and release history

2 release lines since 2024, as listed by the npm registry. The latest version is 1.3.0, released 5 Nov 2026.

| Version | Released | Latest release | Releases |
| --- | --- | --- | --- |
| 1 | 7 May 2026 | 1.3.0 (5 Nov 2026) | 28 |
| 0.x (before 1.0) | 25 Mar 2024 | 0.15.1 (18 Dec 2024) | 19 |

Sources: [npm registry, package rolldown](https://www.npmjs.com/package/rolldown), checked 8 Nov 2026.

## Questions about Rolldown

### What is Rolldown?

A bundler written in Rust with a Rollup-compatible API. It is being built as the future core of Vite so that the dev server and the production build use the same fast tool. The be1st catalog lists Rolldown under Build Tools. License of Rolldown: MIT.

### What is the latest version of Rolldown?

The latest version of Rolldown is 1.3.0, released 5 Nov 2026 (source: npm registry, package rolldown).

### How many websites use Rolldown?

44 of the 16,845 websites audited by be1st run Rolldown (<1%), as of 8 Nov 2026.

### When was Rolldown first released?

Rolldown was first released in 2023; the oldest version listed by the npm registry dates from 2024.

### Is Rolldown still a modern choice?

Yes. Rolldown counts as a modern technology. A young project by the Vite team; becoming the default bundler step by step from Vite 7.

### What are the alternatives to Rolldown?

Technologies that do the same job as Rolldown include esbuild and Rollup.

Numbers: latest audit of each of 16,845 websites audited by be1st, as of 8 Nov 2026.