Online XML JSON Converter

Data from a service or file may arrive as XML even when the next tool expects JSON. An online XML-to-JSON converter maps XML elements into JSON objects and arrays for you to review and copy.

You’ll learn how to convert XML online and check whether the JSON output has the shape your next step expects.

TL;DR

Paste well-formed XML into the converter above, select Convert XML to JSON, then inspect and copy the JSON it returns.

• XML elements become nested object properties.
• Attributes and repeated elements need special attention when you reuse the result.
• Fix parser errors in the XML before relying on a conversion.

What Is XML to JSON Conversion?

XML stores data in named elements, which can contain attributes, text, and other elements. JSON represents data as objects, arrays, and values, so conversion means mapping the XML tree into those JSON shapes.

The page uses x2js 1.2.0 to convert the input before JSON.stringify formats the result.

XML part	What to look for in the JSON
Nested element	A property nested under its parent object
Attribute	An underscore-prefixed property
Text inside an attributed element	A separate text property alongside the attribute
Repeated same-name elements	A collection represented as an array when the parser detects repeats

Namespace declarations can be inherited from ancestors, including a default namespace with no visible prefix. When a consumer depends on namespace identity, check the URI and local name rather than relying on prefix spelling.

How to Convert XML to JSON Online

The screenshot shows the current controls, not a completed conversion.

Step 1: Prepare the XML document

Well-formed XML has closed, case-matched tags and one root element. Check that structure before you convert the document.

Source detail	What to check before pasting
XML declaration	It can appear before the root element and identify the XML version and encoding
Reserved characters	Less-than signs and ampersands used as data need XML character references
Namespaces	Keep the declarations that define prefixes used in element and attribute names

Keep a copy of the source if you will edit or reuse the result.

Step 2: Paste the XML into the input field

Paste the markup into XML Input. Include the complete parent element around the values you need.

For data copied from an API response, remove surrounding text outside the XML document. Keep the relevant root element and any declarations that define names used by the document.

The page accepts pasted XML text. Open a local file in an editor and paste its contents, or copy the XML text from a response before using this converter. No input-size maximum is stated, so move very large documents to a local parser rather than assuming a browser limit.

Step 3: Convert the XML

Select Convert XML to JSON. If the input field is empty, the page displays a prompt asking for XML instead of a JSON object.

The embedded script catches conversion exceptions and writes an error label and message into the output field. Read that message as a clue about the parser’s rejection, then check the source markup.

Wait for the result to appear in JSON Output before copying it. This page uses a button rather than a live, as-you-type conversion, so changing the source means selecting the conversion button again.

Step 4: Inspect and copy the JSON

Read the output from the outer object inward. Compare its root property with the XML root and scan the nested values in the same order as their parent-child relationship.

Select the text in JSON Output and copy it before using Clear All, which removes both fields. Keep the original XML available until you have finished checking the converted data.

The indentation comes from JSON.stringify’s two-space formatting option.

What Should You Check in the JSON Output?

Inspect the output before sending it to another tool because valid JSON syntax does not guarantee the receiving application expects that shape.

XML case	What can surprise you	What to verify
Repeated sibling tags	A single occurrence and repeated occurrences may have different JSON shapes	Confirm your code handles both a value and an array where relevant
Attributes	Attribute names may use a prefix rather than matching child-element names	Check underscore-prefixed fields and the consumer’s expected key names
Text plus attributes	Text may be stored under a special property rather than as a plain string	Read the text field and attribute fields separately
Namespaces	Prefixes can appear in names or affect how names are represented	Compare output keys with the namespace-aware names your application expects
Comments or processing instructions	XML features may not have a direct JSON equivalent	Check whether the destination needs those details
Mixed text and child elements	Order and node boundaries may be represented differently	Compare the converted data with the source when order matters
CDATA	CDATA is XML syntax for character data, not a separate JSON value type	Confirm the text content is present in the representation

Object property names are case-sensitive. A consumer looking for Item may not find a key named item, so match spelling and capitalization to the receiving contract. Do not normalize keys without checking.

If you edit the copied result, keep to JSON syntax. Property names and strings use double quotes, and trailing commas or comments can make a JSON document invalid. Recheck the text after manual edits before pasting it into an application.

The x2js project says its conversion is not necessarily lossless. If comments, processing instructions, or mixed text matter, compare the source with the output before reuse.

Run the result through the schema or validation step used by its destination. Conversion itself does not check that your application’s required fields or business rules are satisfied.

How Do You Fix XML Conversion Errors?

Start with malformed XML because the parser must accept the source before a JSON result can be produced.

Symptom	Likely cause	Fix
Unclosed or mismatched tag	Missing close tag or capitalization differs	Add the closing tag and match its name exactly
Unexpected ampersand	A literal ampersand is unescaped in text or an attribute	Escape the character using its XML entity
Multiple root-level elements	Related elements have no single parent	Wrap them in one root element
Unexpected JSON shape	A tag repeats, has attributes, or mixes text and children	Inspect the corresponding XML node and mapping rule

The browser’s DOMParser can parse XML text into a document. Malformed input may be reported in the parsed document. The error wording can differ between parsers.

The page markup references x2js from a CDN. That identifies where the library is hosted, but it does not show whether pasted text is transmitted or retained. For confidential records, use an approved local workflow and follow your organization’s handling rules.

Conclusion

This page works for one-off conversion and inspection. For recurring transformations, put conversion in application code and keep a small XML fixture with its expected JSON beside your tests.

Include a nested element and a repeated tag so the fixture exposes shape changes. Rerun it when the source format or parser version changes.

If you need the reverse transformation, use CodeForGeek’s JSON to XML converter. For larger server-side XML workloads, read how to parse large XML files in Node.

For browser parsing behavior, see MDN’s DOMParser documentation. The x2js project documentation describes the library used by this page.

FAQ

These answers cover common questions about the output and its limits.