Convert JSON to TOML and TOML back to JSON, in both directions, entirely in your browser.
How to use the JSON / TOML
Choose a direction: JSON to TOML or TOML to JSON.
Paste your JSON or TOML.
Copy the result, or swap to convert back.
Frequently asked questions
TOML is a minimal configuration format designed to be easy to read, used by tools like Cargo and many Python projects in pyproject.toml.
Most data does. TOML has no null, so JSON nulls cannot be represented; remove or replace them before converting.
No. The conversion runs entirely in your browser, so your data never leaves your device.
A two-way JSON and TOML converter built on a well-tested TOML parser, handling nested tables and arrays.
It runs locally in your browser, so it is fast and private.
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