> ## Documentation Index
> Fetch the complete documentation index at: https://bun-1dd33a4e-farm-de84d354-pm-sbom.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Read environment variables

Access the current environment variables with `process.env`.

```ts index.ts icon="https://mintcdn.com/bun-1dd33a4e-farm-de84d354-pm-sbom/IPGjipyt_DGwYrQc/icons/typescript.svg?fit=max&auto=format&n=IPGjipyt_DGwYrQc&q=85&s=4448657ec154e63e3a095030af59c903" theme={"theme":{"light":"github-light","dark":"dracula"}}
process.env.API_TOKEN; // => "secret"
```

***

Bun also exposes these variables as `Bun.env`, an alias of `process.env`.

```ts index.ts icon="https://mintcdn.com/bun-1dd33a4e-farm-de84d354-pm-sbom/IPGjipyt_DGwYrQc/icons/typescript.svg?fit=max&auto=format&n=IPGjipyt_DGwYrQc&q=85&s=4448657ec154e63e3a095030af59c903" theme={"theme":{"light":"github-light","dark":"dracula"}}
Bun.env.API_TOKEN; // => "secret"
```

***

To print all currently-set environment variables, run `bun --print process.env`.

```sh terminal icon="terminal" theme={"theme":{"light":"github-light","dark":"dracula"}}
bun --print process.env
```

```txt theme={"theme":{"light":"github-light","dark":"dracula"}}
ProcessEnv {
  BAZ: "stuff",
  FOOBAR: "aaaaaa",
  <lots more lines>
}
```

***

See [Environment variables](/runtime/environment-variables).