Convert XML to JSON online, attributes and all

Because XML lets an element have both an attribute and a child element with the same name. Prefixing the attribute keeps both, where a flat merge would silently drop one.

The first occurrence becomes a value and any repeat turns it into an array. This means a list of one item comes out as a single value rather than an array of one, which is a known limitation of converting XML without a schema.

You get the parser message describing what it found and where, rather than a partial result. Unclosed tags and stray ampersands are the two most common causes.

Prefixed names are kept as written, so soap:Envelope stays soap:Envelope. The namespace declarations themselves come through as attributes.

No. Parsing uses DOMParser inside your browser, so a document containing customer or invoice data stays on your machine.