# Bun
URL: https://wwadd.dev/tools/bun · Official site: https://bun.com/docs
Kind: All-in-one JavaScript runtime · License: Open source · Last verified: 2026-10-05

A JavaScript runtime with an integrated package manager, bundler, and test runner. It transpiles TypeScript and JSX while executing them, and implements many Node APIs so existing packages can work with it.

Reach for it when:
- Integrated installs, scripts, and tests with dependencies you have validated
- Applications whose runtime, native add-ons, and host support have been checked on Bun

Worth knowing: Execution does not type-check. Node API compatibility is incomplete; test native add-ons and deployment behavior. Using Bun as a package manager does not require using it as the production runtime.

Repository: https://github.com/oven-sh/bun
Recorded SPDX baseline: NOASSERTION