Question 1

How do I format XML online without installing anything?

Accepted Answer

Paste your XML — a SOAP response, RSS feed, Android manifest, Maven POM or plist — into jslet's XML formatter and it pretty-prints instantly with clean indentation. You can switch between 2-space, 4-space and Tab indent styles to match your project conventions, minify to a single line for transport, and run a well-formedness check at any time. The tool uses the browser's native DOMParser, which is the same parser browsers use for XHTML and SVG, so the validation is authoritative, not an approximation. Everything runs locally — your XML never leaves your device.

Question 2

Why does my XML fail to parse?

Accepted Answer

The four most common XML errors are: unclosed tags (every opening tag must have a matching closing tag), multiple root elements (XML allows exactly one root), unescaped special characters (use & for &, < for <), and unquoted attribute values. This tool reports the exact line and column of the first problem using the browser's native DOMParser, so you can jump straight to the fix instead of hunting through the document. The same parser that rejects your document is the one browsers use for XHTML — if DOMParser says it is broken, real-world consumers will reject it too.

Question 3

Can this tool convert XML to JSON?

Accepted Answer

Yes. The XML→JSON mode maps element names to object keys, child elements to nested objects, repeated elements to arrays, and attributes to a special '@' prefixed key. The conversion is lossless in structure but has one honest caveat: XML attributes and child elements live in different namespaces, so a naive conversion can collide (an element named 'id' next to an attribute 'id'). This tool prefixes attributes with '@' to keep them separate — the standard convention used by xml2js and most converters. JSON→XML works in reverse, generating attributes for '@' keys. Use it for SOAP responses, RSS feeds or legacy config files that need to move into a modern JSON pipeline.

Question 4

Is my XML uploaded to a server?

Accepted Answer

No. Every operation — formatting, minification, validation, and XML↔JSON conversion — runs entirely in your browser via JavaScript. Your XML never leaves your device. This matters when debugging SOAP API responses that may contain tokens, or legacy enterprise config files with internal paths. Open the Network tab (F12) before converting and you will see zero outbound requests. Free, no account, no usage limits.

XML Formatter & Validator

🟢📖 The XML Gotchas This Formatter Catches