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Dotenv Build Status

Dotenv handling for deno.


Setup a .env file in the root of your project.

# .env
GREETING=hello world

Then import the configuration using the config function.

// app.ts
import { config } from "";


Then run your app.

> deno app.ts
{ GREETING: "hello world" }


  • path?: string: Optional path to .env file. Defaults to ./.env.
  • export?: boolean: Set to true to export all .env variables to the current processes environment. Variables are then accessable via deno’s env function. Defaults to false.

Auto loading

load.ts automatically loads the local .env file on import and exports it to the process environment:

# .env
GREETING=hello world
// app.ts
import "";
import { env } from "deno";

> deno --allow-env app.ts
hello world

Parsing Rules

The parsing engine currently supports the following rules:

  • BASIC=basic becomes {BASIC: 'basic'}
  • empty lines are skipped
  • lines beginning with # are treated as comments
  • empty values become empty strings (EMPTY= becomes {EMPTY: ''})
  • single and double quoted values are escaped (SINGLE_QUOTE='quoted' becomes {SINGLE_QUOTE: "quoted"})
  • new lines are expanded if in double quotes (MULTILINE="new\nline" becomes
  • inner quotes are maintained (think JSON) (JSON={"foo": "bar"} becomes {JSON:"{\"foo\": \"bar\"}")
  • whitespace is removed from both ends of the value (see more on trim) (FOO=" some value " becomes {FOO: 'some value'})


Issues and pull requests welcome. Please run make fmt before commiting.


  • Inspired by the node module dotenv.