XML Formatter, Validator & Converter

Format and minify XML, validate that it's well-formed with the error's line and column, convert XML to JSON and JSON to XML with a documented representation (attributes, text, CDATA, comments), and show the number of elements, attributes, depth, and namespaces. For security, any <!DOCTYPE> declaration is rejected outright: DTDs, external entities, and XInclude are never processed.

Processed on your device, no AIhasta 20.000 elementos, profundidad máxima 200

Data is processed on your device and never sent to any server.

For security, any <!DOCTYPE> is rejected outright: DTDs and external entities are never processed.

or upload an .xml or .json file

The data is processed on your device and is never sent to the server.

Use cases

How to use this tool

  1. Paste or upload the XML (or JSON to convert to XML)
  2. Choose format, minify, validate, or convert
  3. Copy or download the result

Frequently asked questions

Does it process DTDs or external entities?
No, never. Any <!DOCTYPE> is rejected outright before the XML is parsed, precisely to avoid exposing you to external entity (XXE) attacks.
Is the XML → JSON conversion perfectly reversible?
Not for mixed content (interleaved text and elements) or for CDATA/comments, whose exact position isn't preserved; the tool states this explicitly instead of claiming a reversibility that doesn't exist.

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