How to use XML Validator

What it does

Check XML syntax for errors and ensure compliance with W3C standards. It runs entirely in your browser — your input never leaves your device.

Options

Every setting this tool exposes, straight from the code that validates it.

Worked example

Run these settings on the tool page:

• xml: <root><item>1</item></root>

You get:

✅ XML is Valid

No syntax errors found. The structure is well-formed and compliant with standard XML rules.

Troubleshooting

• Nothing happens / the output stays empty. xml is required — the tool waits until you provide it.
• It is slow on very large input. Everything runs in your browser, so speed depends on your device. Very large inputs are best split up, or run through the API where the work happens on our servers.

Automating it

The same logic is available as a REST endpoint, so you can run it from a script, a CI job or your own app.

Bash
curl "https://api.toolsxpo.com/v1/xml-validator" \
  -H "Authorization: Bearer $TOOLSXPO_KEY"

It costs 1 credit per successful call. See the full endpoint reference, or try it in the playground.

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