.env.local ~repack~ Official
Hardcoding API keys, database credentials, or server ports directly into your source code creates severe security vulnerabilities and deployment friction. This is where environment variables come in.
DB_HOST=dev-db-host DB_PORT=5433 API_KEY=YOUR_DEV_API_KEY
Always ensure your project's .gitignore file includes the following line: .env.local Use code with caution. .env.local vs. Other .env Variants
DATABASE_PASSWORD=SuperSecretLocalDevPassword API_BASE_URL=http://localhost:4000 NEXT_PUBLIC_APP_NAME=MyApp-LocalDebug .env.local
The .env.local file, by contrast, is for personal overrides —values specific to your local setup that you don't want to share:
When a framework builds or boots an application, it typically loads variables in the following order (higher items overwrite lower items): Target Environment Committed to Git? .env.production.local / .env.development.local Environment-specific local machine No Local testing of production/development-specific values. 2 .env.local All local environments No Overwrites defaults for a developer's specific machine. 3 .env.production / .env.development Specific environments across all machines Yes Shared defaults for production or staging environments. 4 (Lowest) .env Universal baseline defaults Yes Shared defaults across all environments and machines.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Hardcoding API keys, database credentials, or server ports
When a new developer clones the repository, they simply copy .env.example to create their own .env.local and fill in their unique credentials: cp .env.example .env.local Use code with caution. Framework-Specific Implementation
, this file is used to override default settings specifically for your local development environment.
// lib/env.ts function requireEnv(name: string): string const value = process.env[name]; if (!value) throw new Error(`Missing required environment variable: $name`); their policies apply.
To expose a variable to the browser, you must prefix it with NEXT_PUBLIC_ . NEXT_PUBLIC_ANALYTICS_ID=UA-12345678-1 Use code with caution.
The file uses a simple KEY=VALUE format. Here is a typical example of what the content of a .env.local file looks like:
