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A quick way to understand who this helps, what it solves, and where it connects next.
Developers checking XML is well-formed.
Using the xml validator without installing anything or signing up.
Capture xml-validator intent with a fast, browser-side tool that runs 100% locally.
Cleanor Labs
These sections explain the job in plain language and set expectations for what the tool should do well.
Well-formed XML must have matching tags, correct nesting, quoted attributes, and a single root element, and one missing bracket can break an entire feed or config file. This validator uses the browser's built-in XML parser to check the markup you paste, reporting the first parse error the parser finds so you can fix it quickly. When the XML is well-formed it shows a formatted, indented version you can copy. Because it relies only on your browser, the XML never gets uploaded to any server.
Short answers for the questions people usually have before trying a utility like this.
Well-formed XML follows the syntax rules of XML: every element is properly closed and nested, attribute values are quoted, and there is exactly one root element. It is not the same as validating against a schema or DTD.
The browser XML parser stops at the first fatal error it encounters, so fix that issue and re-run to reveal any later problems.
No. Validation and formatting run locally in your browser using the built-in parser, so the content stays on your device.
Every tool on Cleanor is free with no sign-up, no credits, and no limits. Files are processed privately in your browser. Looking for on-device phone cleanup and Premium features? That lives in the Cleanor app.
Paste XML to check whether it is well-formed. See the first parse error or a formatted version. Nothing is uploaded.
Checked locally in your browser with the built-in XML parser.