vtree converts JSON to XML right in your browser — no account, no sign-up, and nothing you paste ever leaves your device.
XML needs exactly one root element, so the JSON must be a single object at the top level — a bare array or plain value has nowhere to attach as the root. Wrap it in an object first.
As repeated sibling elements with the same tag name — the same convention vtree's own XML parser expects back.
Yes — a key prefixed with @_ (e.g. "@_id": "1") is written as an XML attribute instead of a child element.
No. The conversion runs entirely in your browser.
Yes, vtree is free with no account or sign-up required.