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bun.sh/docs/guides/runtime/read-env.mdx
2025-11-21 14:06:19 -08:00

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---
title: Read environment variables
sidebarTitle: Read env variables
mode: center
---
The current environment variables can be accessed via `process.env`.
```ts index.ts icon="/icons/typescript.svg"
process.env.API_TOKEN; // => "secret"
```
---
Bun also exposes these variables via `Bun.env`, which is a simple alias of `process.env`.
```ts index.ts icon="/icons/typescript.svg"
Bun.env.API_TOKEN; // => "secret"
```
---
To print all currently-set environment variables to the command line, run `bun --print process.env`. This is useful for debugging.
```sh terminal icon="terminal"
bun --print process.env
```
```txt
BAZ=stuff
FOOBAR=aaaaaa
<lots more lines>
```
---
See [Docs > Runtime > Environment variables](/runtime/environment-variables) for more information on using environment variables with Bun.