Assembly Line

Tsdown

The elegant bundler for libraries powered by Rolldown

Tsdown is an open-source javascript build tools project on GitHub under the MIT license (permissive), with 4.3k stars. It is built with TypeScript, V8, Vite and Core. Its last push was yesterday.

Stars
4.3k
License
MIT
Activity
Active
Latest release
v0.23.5

Code on GitHub Website

Judgement

What it is
Developer tool
What it does
Bundles TypeScript and JavaScript libraries for publishing, generating declaration files, using Rolldown and Oxc, with options compatible with tsup.
Adopt it when
You publish npm libraries and want a near-zero-config bundler, especially as a replacement for tsup.
Watch out
It is pre-1.0, so options can still change between minor versions.
Ready for
Usable
Runs as
Command line
Built with
TypeScript, Rolldown and Oxc
How established
Established: started 2 years ago, latest release v0.23.5.
What the license allows
You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-06 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

TypeScriptV8ViteCore

Follow it down: Tsdown → TypeScript → Go → runs on a microchip

How compilers were built, back to punched paper tape

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Stars, license and activity come from GitHub and refresh on a rolling hourly schedule. The project's own description is quoted as written.