XML Validator
Use our XML validator to syntax-check your XML.
Well Formed XML Documents
An XML document with correct syntax is called "Well Formed".
The syntax rules were described in the previous chapters:
XML documents must have a root element
XML elements must have a closing tag
XML tags are case sensitive
XML elements must be properly nested
XML attribute values must be quoted
<?xml version="1.0" encoding="UTF-8"?>
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>
XML Errors Will Stop You
Errors in XML documents will stop your XML applications.
The W3C XML specification states that a program should stop processing an XML document if it finds an error.
The reason is that XML software should be small, fast, and compatible.
HTML browsers are allowed to display HTML documents with errors (like missing end tags).
With XML, errors are not allowed.
Syntax-Check Your XML
To help you syntax-check your XML, we have created an XML validator.
Try to syntax-check correct XML :
<?xml version="1.0" encoding="UTF-8"?>
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>
Try to syntax-check incorrect XML :
<?xml version="1.0" encoding="UTF-8"?>
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</pheading>
<body>Don't forget me this weekend!</body>
</note>
Try to syntax-check your own XML :
<?xml version="1.0" encoding="UTF-8"?>
Valid XML Documents
A "well formed" XML document is not the same as a "valid" XML document.
A "valid" XML document must be well formed. In addition, it must conform to a
document type definition.
There are two different document type definitions that can be used with XML:
DTD - The original Document Type Definition
XML Schema - An XML-based alternative to DTD
A document type definition defines the rules and the legal elements and attributes
for an XML document.
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Reference: https://www.w3schools.com/xml/xml_validator.asp