Tool Overview

This tool turns JSON data into XML. You paste or upload JSON and get valid XML back.

Many APIs and apps use JSON. Other systems expect XML. Moving data between them by hand is slow and easy to get wrong. This tool does the conversion for you so you get correct XML without writing code.

It is for developers, testers, and anyone who needs to feed JSON into XML-based APIs, legacy systems, or configs. You can use it with basic knowledge of JSON and XML.

Background and Concepts

JSON uses braces and brackets. XML uses tags and attributes. Both can represent the same data in different shapes. A related operation involves converting XML to JSON as part of a similar workflow.

JSON is common in web APIs and configs. XML is common in enterprise systems, document formats, and older integrations. When one system sends JSON and another expects XML, you need a conversion step.

Converting by hand is tedious. You must decide how to name the root element, how to represent arrays, and how to escape special characters. This tool applies clear rules: you choose a root name and how arrays are written; the tool handles nesting, escaping, and valid XML names.

Key Features

• Paste or upload. You can paste JSON into the input box or upload a .json file. The tool converts as you type (after a short delay). Uploaded files are limited by size so the page stays responsive.
• Custom root element. You set the name of the top-level XML element. The default is "root". This helps match the XML structure required by your API or system.
• Array handling. You choose how arrays are written in XML. Repeat tags: each array item becomes its own element with the same name (e.g. several <item> elements). Wrapper tag: the array is one parent element and each item is a child <item>. Both keep the data; the shape differs.
• Optional namespace. You can add an XML namespace URI for the root element. Useful when the XML must declare a namespace for validation or integration.
• Safe element names. JSON keys are turned into valid XML element names. Invalid characters are replaced; names that start with a number get a safe prefix. This avoids invalid XML.
• Escaped text. Special characters in values (< > & ' ") are escaped so the output is valid XML and safe to use.
• Copy and download. You can copy the XML to the clipboard or download it as a file. The file name uses the root element name you set.
• Optional AI analysis. For smaller JSON you can request a structural suggestion. The tool may suggest a different JSON shape and you can apply it or dismiss it. This is optional and not required for conversion.

Common Use Cases

API integration. An API returns JSON but another service or legacy system expects XML. Paste the JSON, set the root name and array style, and use the generated XML in requests or configs. For adjacent tasks, converting CSV to XML addresses a complementary step.

Data exchange. Moving data from a JSON-based app into an XML-based workflow or ETL. Convert once or repeatedly as data changes.

Testing. Creating XML payloads from sample JSON for tests, mocks, or documentation.

Config and templates. Some tools take XML config. If your source is JSON, convert it to the expected XML shape. When working with related formats, converting JSON to YAML can be a useful part of the process.

Learning. Seeing how the same structure looks in JSON vs XML helps understand both formats.

How to Use This Tool (Step-by-Step)

1. Open the JSON to XML converter page.
2. Paste your JSON into the input area or use the upload button to choose a .json file. The file must be within the allowed size.
3. Open settings if you want to change options. Set the root element name (e.g. "root" or "Response"). Choose array handling: repeat tags or wrapper tag. Optionally enter a namespace URI.
4. Wait a moment. The tool converts automatically after you type or change options. The XML appears in the output area.
5. If you see an error, check that the input is valid JSON. Fix missing commas, quotes, or brackets and try again.
6. Use copy to put the XML in the clipboard or download to save it as a .xml file. Use clear to remove input and output and start over.
7. Optionally, use AI Analysis to get a suggested JSON structure. You can apply it to the input or dismiss it. Conversion works the same with or without it.

Calculations and Logic

The tool does not do numeric calculations. It transforms structure and text.

The input string is parsed as JSON. If parsing fails, you get an error. The parsed value must not be null or undefined at the top level. Then a root XML element is created with the name you set (or "root") and an optional namespace. The JSON value is walked recursively. Objects become nested elements; each key becomes an element name after sanitization. Arrays are handled in one of two ways: repeat (each item is an element with the same name as the key, or "item" for bare arrays) or wrapper (one parent element and each item in an <item> child). Primitive values are escaped and written as element content. Nesting depth is limited to avoid crashes. Output length is limited; if the result would be too large, you get an error and are asked to reduce input size. The result is a single string starting with the XML declaration and the root element. In some workflows, converting YAML to JSON is a relevant follow-up operation.

Tips, Limitations and Best Practices

Valid JSON. The input must be valid JSON. Check commas, quotes, and brackets. Use a JSON validator if you are unsure.

Root name. Use a name that fits your schema or API. Avoid spaces and special characters; the tool will sanitize but a simple name is clearer.

Arrays. Repeat tags give flatter XML with repeated element names. Wrapper tag gives one container with <item> children. Choose based on what the consumer expects. For related processing needs, converting JSON to CSV handles a complementary task.

Size limits. Input and output have maximum sizes. Very large JSON or XML may be rejected or truncated. Split data or process in chunks if needed.

Nesting. Very deep nesting can hit the depth limit. Simplify the structure if you hit that error.

Names. JSON keys that are not valid XML names are sanitized (e.g. spaces or symbols replaced). If you need specific tag names, use keys that are already valid.

Privacy. Do not paste sensitive or secret data if you use AI Analysis; that data may be sent for analysis.