XML Validator

Check XML for well-formedness and pinpoint unclosed tags, nesting errors, and unescaped characters by line and column.

For this tool, processing runs locally in your browser and data is not sent to the server.

XML Validator is a free online tool that checks whether XML is a well-formed document. It helps you quickly find unclosed tags, incorrect nesting, attribute errors, unescaped characters, and other parsing issues before sending XML to an integration. The tool runs in your browser and does not send data to the server.

What it does

Output

Processing

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How to use

Paste an XML document, SOAP response, RSS feed, sitemap, config, or XML fragment.
Click Validate XML or wait for automatic validation.
Check the status: XML valid or XML contains an error.
If there is an error, read the message, line, column, and the context snippet around the problem.

More about this tool

XML Validator checks whether XML is a well-formed document. The tool helps you quickly find unclosed tags, incorrect nesting, attribute errors, unescaped characters, and other parsing issues before sending XML to an integration. The service is useful for SOAP, RSS, sitemaps, XML APIs, configs, and legacy exchanges.

The validator checks well-formed XML, shows a validity status, error message, line, column, and a context snippet. For valid XML it can display structural statistics. It does not perform XSD validation and does not check business rules of the document.

All processing is done locally in the browser. Your data is not sent to the server.

Runs in the browser
Data is not sent to the server
Validates well-formed XML
Shows validity status
Pinpoints error line and column
Shows XML document statistics
Useful for SOAP, RSS, sitemaps, XML APIs, and configs
No registration required

Frequently Asked Questions

What does the XML Validator do?

It checks whether the XML is a well-formed document: whether tags are correctly closed, nesting is correct, and whether the XML can be parsed.

What is well-formed XML?

Well-formed XML has a correct basic structure: a single root element, properly closed tags, correct nesting, valid attributes, and escaped special characters.

Does the validator show the location of the error?

Yes. Where the parser returns a position, the tool shows the error message, line, column, and a context snippet around the problem.

Does the tool validate XSD schemas?

No. This tool checks only well-formed XML. XSD schemas, SOAP contracts, RSS/sitemap specifications, and business rules must be validated with dedicated validators.

Why can an unescaped & break XML?

In XML, the & character must be escaped as & if it is not part of an entity reference. An unescaped & frequently causes a parsing error.

Is the tool suitable for SOAP and RSS?

Yes, for basic structural validation of SOAP, RSS, sitemaps, and XML APIs. Profile-specific specification compliance must be verified separately.

How is the XML Validator different from the XML Formatter?

The XML Validator checks structural correctness and shows errors. The XML Formatter adds indentation to make valid XML easier to read.

Does the validator fix XML automatically?

No. The tool shows the error and hints but does not automatically modify the XML, to avoid corrupting the document.

Is my data sent to the server?

No. XML is processed locally in the browser and is not sent to the server.

Do I need to register?

No. The tool works immediately without registration.

More about this tool

All processing is done locally in the browser. Your data is not sent to the server.

Runs in the browser
Data is not sent to the server
Validates well-formed XML
Shows validity status
Pinpoints error line and column
Shows XML document statistics
Useful for SOAP, RSS, sitemaps, XML APIs, and configs
No registration required

Frequently Asked Questions

What does the XML Validator do?

It checks whether the XML is a well-formed document: whether tags are correctly closed, nesting is correct, and whether the XML can be parsed.

What is well-formed XML?

Well-formed XML has a correct basic structure: a single root element, properly closed tags, correct nesting, valid attributes, and escaped special characters.

Does the validator show the location of the error?

Yes. Where the parser returns a position, the tool shows the error message, line, column, and a context snippet around the problem.

Does the tool validate XSD schemas?

No. This tool checks only well-formed XML. XSD schemas, SOAP contracts, RSS/sitemap specifications, and business rules must be validated with dedicated validators.

Why can an unescaped & break XML?

In XML, the & character must be escaped as & if it is not part of an entity reference. An unescaped & frequently causes a parsing error.

Is the tool suitable for SOAP and RSS?

Yes, for basic structural validation of SOAP, RSS, sitemaps, and XML APIs. Profile-specific specification compliance must be verified separately.

How is the XML Validator different from the XML Formatter?

The XML Validator checks structural correctness and shows errors. The XML Formatter adds indentation to make valid XML easier to read.

Does the validator fix XML automatically?

No. The tool shows the error and hints but does not automatically modify the XML, to avoid corrupting the document.

Is my data sent to the server?

No. XML is processed locally in the browser and is not sent to the server.

Do I need to register?

No. The tool works immediately without registration.