Check XML for syntax errors and format

Well-formed XML as a basis

XML requires correctly closed elements, matching start and end tags, and allowed characters and namespace specifications. The browser parser reports syntax problems, such as an unmasked merchant sign or an incorrect ending tag. The term validator is often commonly used; this tool explicitly checks for well-formedness and not an external scheme.

Mixed content does not pull apart

For a document containing: <p>Hallo <b>Welt</b>!</p> text and elements are common content. Unthinkable indentation could bring additional spaces into the text. Such sections therefore remain coherent. CDATA and xml:space="preserve" are also considered. In purely structured elements, insignificant-looking interspace text nodes can be changed by the indentation; check the result for your application.

Edit files locally

Insert XML or open a UTF-8 file with a maximum of 500 KB. After successful processing, you can copy the text or download it as XML. Processing is limited to 30,000 nodes and 120 levels. DTDs and proprietary entity declarations are not supported; external resources are not loaded for verification.

Check additional technical rules for sitemaps and feeds

A well-formed document can still be an invalid sitemap or an incomplete RSS feed. Mandatory fields, permitted URL types and date formats depend on the application format. For this, use the Sitemap or Feed-Checker. The basic syntax rules describe the W3C XML specification.

Frequent questions