.env Template Generator

Generate a .env template from a JSON object or "key: value" text — keys become UPPER_SNAKE_CASE, values are serialized without quotes.

How it works

• In JSON mode, parses the input and reads the top-level object entries
• In key: value mode, splits each line at the first colon
• Converts every key to UPPER_SNAKE_CASE (apiKey → API_KEY)
• Serializes values without quotes: strings as-is (special characters escaped), booleans as true/false, numbers as plain text

About .env Template Generator

A .env file holds environment variables as plain KEY=value lines, letting the same codebase run with different configuration in different environments — a core idea of the 12-factor app methodology. Loaders such as Node's dotenv, Python's python-dotenv, and shell scripts read it at startup.

Keys are conventionally written in UPPER_SNAKE_CASE, e.g. DATABASE_URL or API_KEY. Generate a template when you scaffold a project so contributors know which variables to fill in — ship it as .env.example. Never commit a real .env to git: add it to .gitignore and keep secrets like tokens and passwords out of version control.