.env.local file is a standard way to manage machine-specific configurations and sensitive data without exposing them to your entire team or public repositories. .env.local In modern development frameworks like Create React App .env.local is used to store environment variables for local development only . It acts as a personal override for shared settings. Key Concepts & Comparison .env.local Shared defaults/templates for all environments. Personal, machine-specific overrides. Version Control Often committed to Git (if no secrets). Must be ignored .gitignore Low (base layer). High (overrides Public API base URLs, feature flags. Personal API keys, local database passwords. How to Use It Create the File
How .env.local Solves the Problem
Local Overrides: Frameworks use .env.local to override default values set in a shared .env file. .env.local
Version Control: Always add .env.local to your .gitignore file to prevent it from being committed to your version control system. Key Concepts & Comparison