YAML to .env Converter

Convert nested YAML to a flat .env file. Each nested key joins with an underscore and converts to UPPER_SNAKE. Useful when you have a structured config in YAML but need to load it via environment variables (12-factor app convention).

How to use the YAML to .env Converter

Paste YAML. Nested keys flatten with the chosen separator. Prefix prepends to every key (useful for namespacing in environments shared with other apps). Strings are quoted; numbers and booleans pass through unquoted.