🛡️ env-verifier-cli

A lightweight and powerful CLI tool to validate your .env files against a defined schema. Very easy to configure with minimal setup.

🚀 Features

Validate .env files for:

• ❗ Missing or invalid required keys
• ⚠️ Unused keys not defined in your schema
• 🧪 Type checking: string, number, boolean, array, JSON (object), Object, Date
• 🧩 Support for optional keys, allowing flexible configurations
• 🔁 Works with multiple .env files (e.g., .env.production, .env.staging, .env.test) and supports type-specific validation for each
• 🛠️ Customizable schema for defining required and optional keys with specific types (string, number, boolean, array, JSON)
• 🌍 Multi-environment support with easy-to-understand validation for complex configurations

📦 Installation

Global:

npm install -g env-verifier-cli

Local (as dev dependency):

npm install --save-dev env-verifier-cli

👨‍💻 Usage

env-verifier --env .env --schema env.schema.json

Or

env-verifier --env .env.staging --schema env.schema.json

Or for different folder paths

env-verifier --env %USERPROFILE%\Downloads\.env --schema %USERPROFILE%\Downloads\env.schema.json --exit true
env-verifier --env $HOME/Downloads/.env --schema $HOME/Downloads/env.schema.json --exit 1
env-verifier --env ~/Downloads/.env --schema ~/Downloads/env.schema.json --exit false

Options:

--env     Path to the .env file to validate                                               (default: .env)
--schema  Path to the schema JSON file                                                    (default: env.schema.json)
--exit    Set true, 'true' or 1 if you want to throw on invalids or warnings              (default: true)

📂 Example (for more details see env.schema.json)

.env file:

API_KEY=abc123
DEBUG_MODE=true
PORT=3000

env.schema.json file:

{
    "REQUIRED_KEYS": {
        "API_KEY": "string",
        "DEBUG_MODE": "boolean"
    },

    "OPTIONAL_KEYS": {
        "PORT": "number"
    }
}

🧩 Supported Types

• string → my-api-key, https://example.com, debug
• number → 3000, 42, 3.14
• boolean → true, false
• array → ["https://myapp.com", "https://admin.myapp.com"], ["feature1", "feature2", "feature3"]
• JSON (object) → {"theme": "dark", "notifications": true}, {"maxRetries": 3, "timeout": 5000}
• date → 2025-01-01, 2023-05-01T15:30:00Z

🔐 FAQ

Don't worry, the .env files provided in this repository contain dummy data only.