How are nested objects and arrays converted?

Nested objects become [table] headers using dotted paths, and arrays of objects become [[array of tables]] entries. Arrays of scalars are written inline, e.g. tags = ["fast", "free"].

How accurate is the conversion?

The output targets the TOML v1.0.0 syntax. Strings are escaped with basic-string quoting and keys that aren't bare-key safe are quoted. JSON null has no TOML equivalent, so it is written as an empty string to keep the file valid.

Is my JSON uploaded anywhere?

No. The conversion runs entirely in your browser with JavaScript — your config and data are never sent to a server or stored.

JSON to TOML Converter

Convert JSON into clean TOML config syntax.

Convert JSON to TOML in your browser

Paste a valid JSON object and get clean TOML config syntax. Nested objects become [table] headers, arrays of objects become [[arrays of tables]], and arrays of scalars are written inline.

Strings are escaped and keys that aren’t safe as bare keys are quoted, targeting the TOML v1.0.0 syntax. The conversion happens entirely in your browser — your config is never uploaded or stored.