rolldown/tsdown

Health v2 · maintenance only

Adoption not part of the score

4233 stars · 184 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

tsdown is a fast bundler designed for building JavaScript/TypeScript libraries, powered by Rolldown and Oxc. It generates declaration files, supports Rollup/unplugin/Vite plugin ecosystems, and offers a seamless migration path from tsup.

Use cases

• bundle a typescript library for npm
• generate d.ts declaration files during build
• migrate from tsup to a faster bundler
• build an npm package with esm and cjs output
• use rollup or vite plugins in a library build
• watch mode for library development

When to choose

• you are publishing a TypeScript/JavaScript library to npm and want fast builds with declaration output
• you want a batteries-included, preconfigured bundler with minimal setup
• you are on tsup and want a compatible, faster alternative
• you need compatibility with the Rollup/unplugin/Vite plugin ecosystem

When to avoid

• you are bundling a full web application rather than a library - use Vite or a framework bundler instead
• you rely on tsup's stub mode, which tsdown does not support
• you need a bundler outside the Rolldown/Rollup plugin ecosystem

Facets

cli-tool · maturity active

build-tool compiler cli developer-tools developer-tools web-development frontend cli cross-platform bundler typescript rolldown oxc library-packaging declaration-files tsup-alternative dts-generation javascript-ecosystem nodejs

Member repositories

For agents

markdown · JSON · MCP: product_card(name="rolldown/tsdown")