XML Validator

Online tool for checking well-formed XML with error line and column hints.

Обработка выполняется локально в браузере. Данные не отправляются на сервер.

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

XML Validator is a free online tool for checking whether XML is a well-formed document. It is useful for SOAP, RSS, sitemap, XML API, and configs. Processing runs locally in your browser.

What it does

Output

Processing

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How to use

Paste an XML document, SOAP response, RSS, sitemap, config, or XML fragment.
Click Validate XML or wait for automatic check.
Check status: XML is valid or contains an error.
If there is an error, review the message, line, column, and fragment near the problem.

More about this tool

XML Validator checks whether XML is a well-formed document.

The tool helps quickly find unclosed tags, wrong nesting, attribute errors, unescaped symbols, and other parsing problems before sending XML to an integration. It is useful for SOAP, RSS, sitemap, XML API, configs, and legacy exchanges.

The validator checks well-formed XML but does not perform XSD validation or business rule checks.

Processing runs locally in your browser.

Checks well-formed XML
Shows correctness status
Helps locate error line and column
Shows XML document statistics
Suitable for SOAP, RSS, sitemap, XML API, and configs
Runs in the browser
Data is not sent to the server
No registration required

Frequently Asked Questions

What does the XML validator do?

It checks whether XML is well-formed: tags are closed correctly, nesting is valid, and a parser can read the document.

What is well-formed XML?

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

Does the validator show where the error is?

Yes. If the parser returns a position, the tool shows message, line, column, and a fragment near the error.

Does the service validate XSD schema?

No. This tool checks well-formed XML only. XSD, SOAP contracts, RSS/sitemap specs, and business rules need separate validators.

Why can the & symbol break XML?

In XML, & must be escaped as & unless it is part of an entity. Unescaped & often causes a parsing error.

Is the service suitable for SOAP and RSS?

Yes, for basic structure check of SOAP, RSS, sitemap, and XML API. It does not validate platform-specific specifications.

How is the XML validator different from the XML formatter?

XML validator checks structure and shows errors. XML formatter adds indentation to make correct XML easier to read.

Does the validator fix XML automatically?

No. The tool shows errors and hints but should not automatically change XML, to avoid distorting the document.

Is my data sent to the server?

No. Processing runs locally in your browser and data is not sent to the server.

Do I need to register?

No. The tool works without registration.

More about this tool

XML Validator checks whether XML is a well-formed document.

The validator checks well-formed XML but does not perform XSD validation or business rule checks.

Processing runs locally in your browser.

Checks well-formed XML
Shows correctness status
Helps locate error line and column
Shows XML document statistics
Suitable for SOAP, RSS, sitemap, XML API, and configs
Runs in the browser
Data is not sent to the server
No registration required

Frequently Asked Questions

What does the XML validator do?

It checks whether XML is well-formed: tags are closed correctly, nesting is valid, and a parser can read the document.

What is well-formed XML?

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

Does the validator show where the error is?

Yes. If the parser returns a position, the tool shows message, line, column, and a fragment near the error.

Does the service validate XSD schema?

No. This tool checks well-formed XML only. XSD, SOAP contracts, RSS/sitemap specs, and business rules need separate validators.

Why can the & symbol break XML?

In XML, & must be escaped as & unless it is part of an entity. Unescaped & often causes a parsing error.

Is the service suitable for SOAP and RSS?

Yes, for basic structure check of SOAP, RSS, sitemap, and XML API. It does not validate platform-specific specifications.

How is the XML validator different from the XML formatter?

XML validator checks structure and shows errors. XML formatter adds indentation to make correct XML easier to read.

Does the validator fix XML automatically?

No. The tool shows errors and hints but should not automatically change XML, to avoid distorting the document.

Is my data sent to the server?

No. Processing runs locally in your browser and data is not sent to the server.

Do I need to register?

No. The tool works without registration.