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JSON

JSON to XML Converter

Details

How to use JSON to XML Converter

What the tool does, how to run it, and what to expect from the result.

How to convert JSON to XML

Converting JSON to XML is usually driven by a consumer you do not control: a SOAP endpoint, a bank or government interchange format, an enterprise system, or a legacy import routine. The mapping is straightforward but lossy, because XML and JSON do not model the same things.

Parsing and conversion run in your browser. Objects become nested elements, arrays become repeated siblings, keys are sanitised into legal element names, and text is escaped so the result is well-formed.

  • Paste valid JSON into the input box. If nothing appears, check for a trailing comma or a single quote, which JSON does not allow.
  • Read the generated XML, which begins with an XML declaration and a root element.
  • Check the element names against what your consumer expects, since keys containing spaces or leading digits will have been rewritten.
  • Add a schema, namespaces, or attributes by hand if the receiving system requires them, because the converter emits elements only.
  • Copy the XML and validate it against the target XSD before sending it to a production endpoint.
Tips

Getting a better result out of JSON to XML Converter

Specific settings and thresholds, not general advice.

  • Type information is lost in the conversion. The JSON number 42, the boolean true, and the strings 42 and true all become identical text nodes in XML, because XML has no native types without a schema. A consumer on the other end has to know what to cast each element back to.
  • Arrays become repeated sibling elements sharing the parent's key name, which is the standard XML idiom. The consequence is that a one-element array and a bare scalar produce identical XML, so the array-ness is not recoverable from the output.
  • Keys are sanitised to be legal XML element names. Any character outside letters, digits, underscore, dot, and hyphen becomes an underscore, and a name that starts with a digit gets an underscore prefix. A JSON key such as first name or 2024 will not survive as written.
  • null becomes an empty element, which is indistinguishable from an empty string. If the difference between absent, null, and empty matters in your data, XML needs an explicit convention for it, such as the xsi:nil attribute, and this converter does not emit one.
  • Everything is emitted as elements, never as attributes. That is a legitimate design choice and it is also the reason the output is more verbose than hand-written XML, typically 30 to 50 percent larger than the JSON it came from.
Limits

What JSON to XML Converter does not do

The honest boundary, so you do not lose time finding it yourself.

  • It cannot map values to XML attributes, so there is no way to produce id="1" rather than an id element.
  • It does not support namespaces, so you cannot generate output for a schema that requires a prefix and a namespace declaration.
  • It does not validate against a DTD or an XSD, so the output is well-formed but not checked against any schema you may need to satisfy.
  • It gives the root element a fixed name and does not let you rename it or wrap the document differently.
Reference

Terms used on this page

Short, plain-language definitions for the formats and settings above.

Files & formatsJSONJSON (JavaScript Object Notation) is a lightweight, text-based format for storing and exchanging structured data as key/value pairs and ordered lists. It is human-readable, language-independent, and the default format for most web APIs and config files.General
At a glance

Who JSON to XML Converter is for

A quick way to understand who this helps, what it solves, and where it connects next.

Best fit

Developers, data engineers, and anyone converting between data formats.

Ideal for

Quick JSON to XML conversion without a backend or install.

FAQ

Common questions

Short answers for the questions people usually have before trying a utility like this.

Is the JSON to XML converter free?

Yes. It is completely free to use, with no signup, no account, and no paywall.

Do I need to install anything?

No. It runs in any modern browser on desktop or mobile, with nothing to download and nothing to configure.

Does it stay local?

Yes. Your data is converted entirely in your browser and never uploaded to a server.

Why is the XML so much bigger than the JSON?

Because every value is wrapped in an opening and a closing tag whose name is repeated, while JSON writes each key once. A field called description costs 27 characters of tags in XML and 14 in JSON before any content. Expect the output to be roughly a third to a half larger. This is the fundamental reason JSON displaced XML for APIs, and it is a real cost if the payload travels over a network, although gzip compresses the repeated tag names very effectively.

What happened to my JSON types?

They are gone. XML without a schema has exactly one type, which is text, so the number 3.14, the boolean false, and the string false all come out as character data inside an element. Anyone consuming the XML has to know from a schema or from convention which elements are numbers and which are strings. This is a one-way conversion in that sense: you cannot mechanically reconstruct the original JSON from the XML.

Why did my key name change?

XML element names have rules that JSON keys do not. A name cannot contain spaces or most punctuation, and it cannot begin with a digit. Any character outside the legal set is replaced with an underscore, and a name starting with a digit is prefixed with one, so that the output is at least well-formed. If your JSON uses keys like order total or 2024, check the output, because the element names will not match what a downstream consumer expects.

Is my JSON sent to a server?

No. The parsing and conversion happen in your browser with local JavaScript, so the data never leaves your device. That matters when the JSON you are converting is an API response containing customer records or internal identifiers.

Can I convert the XML back to JSON afterwards?

Not faithfully. The conversion loses types, loses the distinction between a single-element array and a scalar, and rewrites any key that was not a legal element name. You can produce some JSON from the XML, but it will not be the JSON you started with. If a round trip matters, keep the JSON as the source of truth and treat the XML as an output format.

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