XML Formatter
Format, minify, and check well-formed XML online for configs, API responses, RSS, SOAP, and document snippets.
Paste XML to indent it or remove whitespace between tags. Processing stays in your browser. The tool checks tag structure, attributes, and the root element, but it does not validate DTD, XSD, or business rules.
Browser-local processing
XML Formatter
How to use
Finish in three steps
- 01
Paste XML text, a config snippet, an RSS item, or an API example into the input box.
- 02
Click "Format XML" to inspect indentation, or "Minify XML" to remove whitespace between tags.
- 03
Review errors, namespaces, attributes, and the target system rules before copying the result.
What the XML Formatter checks
The tool checks for one root element, matching start and end tags, quoted attributes, closed comments and CDATA sections, and only allowed whitespace or declarations outside the root element.
What it does not validate
This tool does not load external DTDs, expand entities, read XSD files, or decide whether fields match SOAP, RSS, SAML, configuration, or API business rules. It focuses on well-formed structure.
When to be careful
Whitespace can be meaningful in XML, especially in mixed text, templates, signatures, or documents that preserve spacing. After formatting or minifying, review the result in the target system if whitespace matters.
FAQ
About this tool
Does this tool validate XML Schema or DTD?
No. It checks well-formed XML structure such as tag nesting, quoted attributes, and the root element. DTD, XSD, namespace semantics, and business-field rules require the target system or a dedicated validator.
Will XML formatting change my data?
Formatting rewrites line breaks and indentation between tags. Element names, attributes, and text nodes are preserved as much as possible, but mixed-content or whitespace-sensitive XML should be reviewed manually.
Why will my XML not format?
Common causes include mismatched closing tags, unquoted attributes, multiple root elements, unclosed comments or CDATA sections, or non-whitespace text outside the root element.
Does this tool upload my XML?
No. XML checking, formatting, and minifying run in the browser. You should still avoid pasting passwords, production keys, customer data, or confidential XML into pages you do not trust.
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