.env.local
Vite uses .env.local similarly, with one crucial difference: variable prefix.
# .env.local DB_PASSWORD=supersecretpassword STRIPE_API_KEY=sk_test_51Mz... DEBUG_MODE=true Use code with caution.
It bypasses default settings to match your personal development setup.
Add .env.local to your .gitignore file immediately to ensure it is never pushed to GitHub or GitLab. # .gitignore .env.local Use code with caution. 4. Use Variables in Code .env.local
Operating systems sometimes hide file extensions, causing developers to accidentally create a file named .env.local.txt .
Provide a file (or .env.local.example ) that lists all required variables with placeholder values. This eliminates the need for any real .env files to be committed, and it helps new developers get started quickly and securely.
The .env.local file is a simple but powerful tool for managing the "personality" of your development environment. It keeps your secrets safe, allows for individual customization, and integrates seamlessly with modern build tools. Vite uses
Do not use spaces around the = sign. KEY = VALUE will often break the parser. Use KEY=VALUE . Summary
# Only available on the server ANALYTICS_SECRET_KEY="secret123" # Available on both server and client NEXT_PUBLIC_ANALYTICS_ID="xyz789" Use code with caution. 2. Vite (React, Vue, Svelte) Vite also natively supports .env.local .
This is powerful for testing, but dangerous if you forget which values are active. It bypasses default settings to match your personal
Older React apps built with Create React App look for the REACT_APP_ prefix.
While it looks like a simple text file, it plays a critical role in keeping your application secure and your development workflow smooth.
This article dives deep into the .env.local file: what it is, how it differs from other env files, its security implications, and the exact patterns you need to use it effectively in 2025.
# .gitignore .env .env.local .env.development.local .env.production.local Use code with caution. The Solution: Using .env.example
