XML validator | Validate Your XML Instantly
Use our XML Validator to check your XML documents for well-formedness and syntax errors. Receive immediate feedback and detailed error messages for corrections. Ideal for developers and data professionals ensuring compliant XML files.
Drop XML file here
Error Details
| Line | Message |
|---|
Common XML Use Cases
Web Services & APIs: Validate SOAP messages and REST API responses
Data Exchange: Verify XML files before importing into databases or systems
Configuration Files: Check application config files for syntax errors
RSS/Atom Feeds: Validate news feeds and syndication formats
Use this tool from your AI agent
Free JSON API and Model Context Protocol (MCP) server. No signup, no API key, CORS open. Designed for Claude, ChatGPT, Cursor, scripts and frontend apps.
curl -X POST https://mate.tools/api/v1/xml-validate.php \
-H "Content-Type: application/json" \
-d '{"xml":"<?xml version=\"1.0\"?><root><a>1</a></root>"}'import urllib.request, json
req = urllib.request.Request(
"https://mate.tools/api/v1/xml-validate.php",
data=json.dumps({"xml":"<?xml version=\"1.0\"?><root><a>1</a></root>"}).encode(),
headers={"Content-Type": "application/json"},
)
with urllib.request.urlopen(req) as r:
print(json.load(r))const r = await fetch("https://mate.tools/api/v1/xml-validate.php", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({"xml":"<?xml version=\"1.0\"?><root><a>1</a></root>"}),
});
console.log(await r.json()); Add to claude_desktop_config.json (Claude Desktop), ~/.cursor/mcp.json (Cursor), or any other MCP-compatible client:
{
"mcpServers": {
"mate-tools": {
"command": "npx",
"args": ["-y", "@mate-tools/mcp-server"]
}
}
}How to Use XML Validator
- Paste your XML content into the editor or drag & drop an XML file
- Click "Validate XML" to check for syntax errors and structure issues
- Use "Format XML" to beautify and properly indent your code
- Copy the validated XML or download it as a file
