.env.local

Popular frameworks have built-in "loading orders." For instance, in , the hierarchy looks like this: .env.local (Highest priority) .env.development / .env.production .env (Lowest priority)

It loads .env , then .env.local , then .env.[mode] (e.g., .env.development ), then .env.[mode].local . .env.local

The .env.local file is a plain-text configuration file used to store that are specific to your local machine. Popular frameworks have built-in "loading orders

.env :

| Practice | Rationale | | :--- | :--- | | | Prevents secret leakage via commit. | | Never use .env.local in production | Use secret injection (e.g., AWS Secrets Manager, Vault, GitHub Secrets). | | Provide a .env.example file | Document required variables without exposing real values. | | Do not place .env.local in build artifacts | Ensure .dockerignore also excludes it. | | Load only necessary variables | Avoid dumping process.env into client bundles. | | | Never use

Creating a .env.local file is a common practice in development environments, especially when working with frameworks like Next.js, Vue.js, or any project that utilizes environment variables for local development. The .env.local file allows you to override environment variables defined in a .env file or set new ones specific to your local environment without affecting version control.

: Open your project folder in your code editor (like VS Code) or terminal. Create the File : Right-click in the Explorer panel, select , and name it exactly .env.local Terminal (macOS/Linux) touch .env.local Command Prompt (Windows) type nul > .env.local : Open a new document, select , set "Save as type" to , and name it .env.local Add Your Variables : Open the file and add your settings using format. For example: API_KEY=your_secret_key_here DB_URL=localhost:5432 Use code with caution. Copied to clipboard Security (Important) .env.local is added to your .gitignore