An XML to JSON Converter is an online tool that transforms XML (eXtensible Markup Language) data into JSON (JavaScript Object Notation) format. It parses structured XML documents — including elements, attributes, nested hierarchies, and text content — and converts them into a clean JSON object structure. This is essential for developers working with APIs, configuration files, or data interchange between systems that use different formats.

This converter offers two modes for handling XML attributes. In @attributes object mode (default), all attributes of an element are grouped under a dedicated @attributes key, keeping them clearly separated from child elements and text content. In Flat @prefix mode, each attribute is prefixed with @ and placed alongside the element's children. You can switch between modes using the Attributes dropdown above the input panel.

When multiple sibling elements share the same tag name, the converter automatically groups them into a JSON array. This ensures that the resulting JSON accurately represents the original XML structure. For example, multiple <book> elements under a <bookstore> root will become a "book": [...] array in the JSON output, preserving all items in order.

Yes, absolutely. All conversion happens entirely on your device — within your browser — using client-side JavaScript. Your XML data is never uploaded to any server, transmitted over the network, or stored anywhere. This means sensitive configuration files, API payloads, or proprietary data remain completely private and secure. You can even disconnect from the internet after loading the page and the tool will continue to work.

This converter supports all standard XML features: elements with nested hierarchies, attributes on any element, text content including whitespace handling, CDATA sections, XML comments (ignored in output), repeating elements converted to arrays, mixed content (text alongside child elements), self-closing tags, and XML declarations. Namespace prefixes are preserved in tag names. The parser handles both UTF-8 and UTF-16 encoded XML documents.

JSON has become the dominant data format for modern web and mobile applications due to its lightweight syntax, native JavaScript compatibility, and ease of parsing. Converting XML to JSON is common when migrating legacy systems, integrating SOAP-based services with RESTful APIs, processing RSS/Atom feeds in JavaScript applications, or simply when you need a more readable and concise data representation. JSON's key-value structure also maps more naturally to programming language objects.

This tool uses the browser's native DOMParser for XML parsing, which performs strict validation. If your XML is malformed — due to unclosed tags, mismatched element names, invalid characters, or improper nesting — the parser will detect the error, and the tool will display a clear error message in the output area. The error details help you quickly identify and fix the issue in your XML document before retrying the conversion.

Yes, this tool can handle XML files up to several megabytes in size. The browser's DOMParser is highly optimized and can process large documents efficiently. However, for extremely large XML files (10MB+), you may experience a brief processing delay. The real-time conversion feature uses a debounce mechanism to prevent excessive processing while you type, ensuring smooth performance. For very large datasets, consider disabling real-time conversion and using the manual Convert button instead.