XML Formatter and Validator — Free Online
Format, indent, and validate XML code online for free. Detect XML syntax errors, pretty-print XML, and minify for production. Instant results.
About XML Formatter
Raw XML is often minified or poorly indented, making it difficult to read and debug. Our XML formatter parses your XML and outputs a cleanly indented well-structured version with consistent indentation. Syntax errors including unclosed tags, missing attributes, and invalid characters are detected and reported with line numbers. The tool also supports XML minification to remove all unnecessary whitespace for production payloads. Supports large XML files including RSS feeds, SOAP responses, sitemap XML, and configuration files.
Frequently Asked Questions
Does it validate XML syntax?
Yes — syntax errors like unclosed tags and invalid characters are highlighted with exact positions.
Can it minify XML?
Yes — remove all whitespace to create a compact single-line XML string.
What types of XML does it support?
RSS feeds, sitemap.xml, SOAP XML, configuration files, and data exchange formats.
Does it validate against an XML schema?
Schema validation is not currently supported. The tool validates well-formedness only.
Is there a size limit?
XML files up to 5MB can be formatted.