XML ↔ JSON Converter & Formatter
Convert between XML and JSON documents with attribute preservation, CDATA & namespaces
About XML ↔ JSON Converter & Formatter
How XML ↔ JSON Converter & Formatter Works
Parses XML documents into an Abstract Syntax Tree (AST), extracting tag names, attributes (configurable @ or _ prefix), CDATA blocks, and repeated sibling elements into JSON arrays. The reverse direction generates well-formed indented XML with optional XML declarations and custom root tags, executing 100% on-device in browser memory with zero network tracking.
XML ↔ JSON Converter & Formatter is an essential data transformation utility for modern web and backend developers who need to bridge legacy XML systems with modern JSON-based architectures. Widely required when working with SOAP web services, RSS and Atom feeds, XML sitemaps, Android layouts, SVG vector definitions, and enterprise banking/healthcare integrations (such as ISO 20022 and HL7), it performs bidirectional translation with high fidelity. When parsing XML to JSON, it preserves attributes using a configurable prefix ('@' by default), converts repeated sibling elements into JSON arrays, respects CDATA raw text sections, and handles namespaces cleanly. When converting JSON to XML, it creates well-formed indented XML elements with custom root tag names, builds XML attributes from '@' keys, and supports automatic XML declaration headers. Because all parsing and serialization execute client-side using a pure JavaScript engine, sensitive enterprise payloads and credentials never leave your browser.
Frequently asked questions
How are XML attributes represented in the resulting JSON?+
By default, XML attributes are prefixed with '@' (for example, <item id="10"> becomes {"@id": 10}). This visual distinction prevents attributes from colliding with child elements of the same name. You can also configure the prefix to '_' or choose 'none' for flat objects.
How does the tool handle repeated XML tags (lists and arrays)?+
When multiple sibling elements share the exact same tag name (e.g. <book>...</book><book>...</book>), the parser automatically gathers them into a JSON array ([{...}, {...}]). Single-occurrence tags are converted into JSON objects.
What happens to CDATA sections (<[CDATA[...]]>)?+
CDATA blocks are preserved verbatim as literal text content, allowing embedded HTML markup, scripts, or special characters to survive the conversion without unwanted entity escaping.
Can I convert JSON back into XML (round-trip)?+
Yes. Clicking the Switch button reverses the conversion direction. In JSON → XML mode, object keys become XML tags, '@' keys become tag attributes, arrays become repeated sibling tags, and you can specify a custom root tag (such as <root> or <response>).
Is my XML or JSON uploaded to any external server?+
No. All parsing, tree construction, formatting, and serialization occur 100% locally in your browser memory. No network calls are made, keeping your proprietary enterprise data confidential.
Limitations
Extremely complex XML DTD schema validation or XSLT stylesheets are not evaluated; the tool focuses on structural XML-to-JSON and JSON-to-XML data transformation.