Developer ToolsFree · Testing phase
XML Formatter & Validator
Check XML syntax and format an XML document.
Workspace
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Your inputs stay in this page. Only the tool name is sent to record a successful use. No account needed.
Common questions
What limitations apply?
DOCTYPE and ENTITY declarations are rejected. No external resources are fetched. Whitespace inside mixed text content is preserved.
Is my input saved?
No. It stays in browser memory and clears on refresh. Successful actions record only a stable tool ID and name, never your entered data.