TOML is a minimal config format — used by Cargo, pyproject.toml and many modern tools.
TOML tables and key=value pairs aim to be unambiguous and easy to read — no significant whitespace rules like YAML. Types include strings, integers, floats, booleans, arrays and inline tables.
Rust, Python and static site generators increasingly default to TOML configs. Tentaco converts TOML↔JSON locally for editing in JSON-first tooling.