Is my TOML data uploaded to a server?

No. The conversion runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.

Which TOML version is supported?

TOML 1.0: tables, arrays of tables, inline tables, dotted keys, multiline strings, dates and times are all parsed according to the specification.

How are TOML dates represented in JSON?

Dates and date-times are serialized as ISO 8601 strings, the standard way to carry timestamps in JSON.

TOML to JSON Converter — Free Online Tool

Convert TOML to JSON instantly in your browser. Free, private and offline-friendly: your config files never leave your device.

Instant Private Zero cookies

Indentation

Swap: JSON → TOML

TOML input

JSON output

Why convert TOML to JSON?

TOML is everywhere in modern tooling — Cargo.toml, pyproject.toml, netlify.toml — but many tools and APIs only accept JSON. Paste a TOML file above and get the equivalent JSON tree, ready to inspect or feed into your pipeline.

How it works

The converter parses your TOML locally according to the TOML 1.0 specification: tables and arrays of tables become nested objects and arrays, typed values keep their type, and dates are output as ISO 8601 strings. Invalid TOML is rejected with an error.

Frequently asked questions

Is my TOML data uploaded to a server?: No. The conversion runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.
Which TOML version is supported?: TOML 1.0: tables, arrays of tables, inline tables, dotted keys, multiline strings, dates and times are all parsed according to the specification.
How are TOML dates represented in JSON?: Dates and date-times are serialized as ISO 8601 strings, the standard way to carry timestamps in JSON.