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About this tool
Convert XML into clean JSON in your browser, with repeated tags turned into arrays and attributes kept under a configurable prefix.
This XML to JSON converter parses an XML 1.0 document — elements, attributes, CDATA, comments and character entities — and rewrites it as JSON using the conventions every mainstream library shares: repeated sibling tags become arrays, attributes are prefixed with @_ so they cannot collide with a child of the same name, and mixed text sits under a #text key. It is aimed at developers moving a legacy SOAP or RSS payload into a JavaScript codebase, and it runs entirely in the page, so payloads with customer data never leave the machine.
Open XML to JSON on AltFTool — it loads instantly in your browser.
Paste your XML into the XML input box, or use Upload .xml for a file up to the 8 MB limit — the box opens with a sample document already in it.
Set Indentation (Minified, 2 spaces or 4 spaces), the Attribute prefix (@_ by default) and the Text key for mixed content (#text), and untick Keep attributes, Parse numbers and true/false or Keep the root element as a key as needed.
The JSON output panel updates live alongside Elements converted, Root element, Attributes, Deepest nesting and JSON size; press Copy JSON, or Download .json to save a file named after the uploaded document or the root element.
Two or more siblings with the same name collapse into a JSON array, so downstream code can map over them without checking the shape first.
Number parsing is skipped for values with a significant leading zero, so a code like 0071 stays the string "0071" rather than becoming 71.
Parsing and serialisation are plain JavaScript in the page — no upload, no API key, no size charge.
Each attribute becomes a key prefixed with @_ by default — an isbn attribute gives "@_isbn". The prefix follows the fast-xml-parser convention and exists so an attribute named title cannot overwrite a child element named title. You can change it to @ or anything else, or drop attributes entirely.
Because JSON has no way to say "this is a list of one". A tag that appears once is emitted as an object, and only the second occurrence turns the key into an array. If your consumer needs a consistent array, normalise it after conversion, or check Array.isArray before mapping.
Mixed content. When an element has both text and child elements — or has attributes plus text — the text cannot be the value of that key, so it is stored under #text. A plain leaf element with no attributes collapses to its string value instead.
Yes. CDATA sections are read verbatim, and the five XML 1.0 predefined entities (& < > " ') plus decimal and hexadecimal character references such as A and A are decoded. Comments, processing instructions and the DOCTYPE declaration are skipped.
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