Bun implements a set of native APIs on the `Bun` global object and through a number of built-in modules. These APIs represent the canonical "Bun-native" way to perform some common development tasks. They are all heavily optimized for performance. Click the link in the left column to view the associated documentation.

{% table %}

- Topic
- APIs

---

- [HTTP](/docs/api/http)
- `Bun.serve`

---

- [File I/O](/docs/api/file-io)
- `Bun.file` `Bun.write`

---

- [Processes](/docs/api/spawn)
- `Bun.spawn` `Bun.spawnSync`

---

- [TCP](/docs/api/tcp)
- `Bun.listen` `Bun.connect`

---

- [Transpiler](/docs/api/transpiler)
- `Bun.Transpiler`

---

- [Routing](/docs/api/file-system-router)
- `Bun.FileSystemRouter`

---

- [HTMLRewriter](/docs/api/html-rewriter)
- `HTMLRewriter`

---

<!-- - [DNS](/docs/api/dns)
- `Bun.dns`

--- -->

- [Utils](/docs/api/utils)
- `Bun.peek` `Bun.which`

---

- [SQLite](/docs/api/sqlite)
- `bun:sqlite`

---

- [FFI](/docs/api/ffi)
- `bun:ffi`

---

- [Testing](/docs/api/test)
- `bun:test`

---

- [Node-API](/docs/api/node-api)
- `Node-API`

---

{% /table %}