TOML ↔ JSON

Config format conversion (@iarna/toml)。 Runs locally—nothing uploaded.

TOML

JSON

Format, validate, query, compare, and convert JSON, YAML, TOML, XML, CSV, and typed models.

How to use & FAQ

TOML ↔ JSON: Config format conversion (@iarna/toml). Runs instantly in the browser.

Free, no signup.

Do I need to sign up to use TOML ↔ JSON?▾

No. All Tools Ku features are free with no registration.

Does TOML ↔ JSON upload my data?▾

No. Processing happens in your browser; data is not uploaded to toolsku.com.

Large JSON?▾

Limited by browser memory; use CLI for huge files.

Invalid JSON?▾

Check brackets, quotes, and commas.

Does it work on mobile?▾

Yes. For large files, use Wi-Fi for a smoother experience.

Can I download the result?▾

Yes. Copy text output or use the download button when available.