Free Data Format Converter

Yes. Convert as much as you like with no account and no limit beyond your device’s memory.

No. Reading and writing happen in your browser tab, so configs with passwords or customer data stay on your device.

JSON, YAML (with anchors, merge keys and several documents), TOML 1.0, XML, CSV and TSV, INI, .env files and URL query strings, in any direction. Types can be generated as TypeScript interfaces, Zod schemas, Go structs or Python dataclasses.

With the line and column, a short explanation and the line itself with a marker. “Go to error” selects the spot in the box.

Whole numbers beyond 2^53, such as 64-bit IDs, stay exact between JSON, YAML and TOML. TOML dates keep their form. Strings such as “yes”, “on” or “2024-01-01” are quoted in YAML, so older YAML readers don’t turn them into booleans or dates.

Attributes become keys starting with @, element text next to attributes becomes #text, and repeated elements become a list. Comments and processing instructions are left out, and in mixed content (text between child elements) the text pieces are joined.

You are told. TOML has no null, so null keys are left out with a note; CSV, INI and .env are flat, so nested values are flattened (address.city, DATABASE__HOST) and lists are written as JSON.

From the example itself: a field missing from some items of a list becomes optional, a field that is sometimes null becomes nullable, whole numbers become integers and objects with the same shape share one type. Check the result if your sample doesn’t cover every case.