JSON
JSON ↔ YAML / CSV / XML / TOML
Convert JSON to YAML, CSV, XML, or TOML and back — entirely in the browser, no libraries.
Convention: attributes are keys prefixed with "@" (@id → id attribute), mixed-content text is the "#text" key, repeated children become an array.
Frequently asked questions
Why does converting to CSV sometimes lose structure?
CSV is inherently a flat, tabular format, so nested objects or arrays cannot be represented directly — they need to be flattened into simple "key: value" pairs first.
How does the tool decide what becomes an XML attribute versus an element?
By convention: keys prefixed with "@" become attributes (for example, @id becomes the id attribute), and the "#text" key is used for mixed-content text. This is this tool's own convention, not a universal XML standard.
Is data sent to a server during conversion?
No, converting to and from YAML, CSV, XML, and TOML happens entirely in your browser via JavaScript, with no external libraries and no server.