DevToolsmith

XML Validator

Checks XML 1.0 well-formedness with line and column errors using the existing strict XML parser.

Runs 100% in your browser — nothing is uploaded

Input
Tip: drop a file here38 chars · 38 bytes · 1 line
Result
0 chars · 0 bytes · 0 lines

Up to 200,000 input characters and 2 million output characters. Processing stays on this device.

Use XML Validator

Checks XML 1.0 well-formedness with line and column errors using the existing strict XML parser. Start with the sample, select the options and run the tool. Copy or download the result after reviewing it.

Behavior and limits

Checks XML 1.0 well-formedness with line and column errors using the existing strict XML parser. DTD validation, XSD validation and application rules are not checked. External DTDs and parameter entities are rejected so unavailable declarations cannot appear validated.

Example input

<users><user id="1">Ada</user></users>

Expected behavior for the example

Reports well-formed XML 1.0. DTD, XSD and application rules remain unchecked.

Check important output in the application that will consume it. Use the tool directory to find related formats and tasks.

Frequently asked questions

How does XML Validator handle my input?

Checks XML 1.0 well-formedness with line and column errors using the existing strict XML parser. DTD validation, XSD validation and application rules are not checked. External DTDs and parameter entities are rejected so unavailable declarations cannot appear validated.

Is my input uploaded or saved automatically?

Processing runs locally in this browser. Input and results are not saved automatically. Downloads happen only when you choose them. The static preview blocks scripts and external resources when one is available.