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Environment Variables (.env) Builder

Generate secure .env files with validation and best practices. Create configuration templates for Node.js, React, and API projects with proper security standards.

Configuration

Variables Configuration

Categories

Custom Variables

Generated Code

10 required variables 
# .env.example
# Environment configuration for template
#
# 🚨 SECURITY NOTICE:
# 1. Copy this file to .env
# 2. Replace example values with actual values
# 3. Add .env to .gitignore
# 4. Never commit sensitive data to version control

# APPLICATION CONFIGURATION
# Environment mode
# Required: Yes
NODE_ENV=development

# Server port
PORT=3000

# Application URL
# Required: Yes
APP_URL=http://localhost:3000

# Application secret key
# Required: Yes
APP_SECRET=your-secret-key-here

# Logging level
LOG_LEVEL=info


# DATABASE CONFIGURATION
# Database connection string
# Required: Yes
DATABASE_URL=postgresql://user:pass@localhost:5432/dbname

# Database host
# Required: Yes
DB_HOST=localhost

# Database port
DB_PORT=5432

# Database name
# Required: Yes
DB_NAME=myapp

# Database username
# Required: Yes
DB_USER=username

# Database password
# Required: Yes
DB_PASSWORD=password


# API KEYS CONFIGURATION
# External API key
# Required: Yes
API_KEY=your-api-key

# External API secret
# Required: Yes
API_SECRET=your-api-secret

# API base URL
API_BASE_URL=https://api.example.com

Quick Templates

Environment Variables Workflow Guide

What This Tool Delivers

The Environment Variables Builder generates secure .env template files with proper validation, framework-specific presets, and security best practices. It supports multiple environments (development, staging, production) and provides comprehensive configuration management for Node.js, React, Next.js, and Docker projects.

Built-in validation ensures UPPER_SNAKE_CASE naming conventions, detects duplicate variables, and enforces security guidelines. The tool automatically generates appropriate default values, includes helpful comments, and provides export functionality for seamless integration into your development workflow.

  • Framework-specific variable templates for popular stacks
  • Multi-environment configuration support
  • Security validation and best practice enforcement
  • Export to .env files with proper formatting
  • Inline documentation and example values

Best Practices for Secure Configuration

Consistent Naming: Use UPPER_SNAKE_CASE format with descriptive prefixes (DB_, API_, MAIL_) to keep configurations organized and self-documenting across environments.
Security First: Never commit secrets to version control. Use different keys per environment and implement proper access controls with secret management tools.
Environment Separation: Maintain separate configurations for development, staging, and production with appropriate security levels and validation requirements.
Documentation & Validation: Include .env.example files, validate environment variables on startup, and document required vs optional variables for team collaboration.

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