XML Formatter & Beautifier
Format, beautify, and minify XML code online. Clean up messy markup with proper indentation and validation.
XML Code Editor
Tool Purpose & Audience
The XML Formatter takes minified, collapsed, or poorly-indented XML and reformats it with proper hierarchical indentation — making the tag structure, attributes, and element nesting immediately visible and readable. It also validates that the XML is well-formed.
Backend developers, API integrators, data engineers, and anyone working with XML-based formats (SOAP, RSS, Atom, SVG, Maven POM, Android layouts, Office Open XML) use this tool to inspect XML responses, clean up generated XML, and debug parsing issues in data pipelines.
Real-World Use Cases
- SOAP API debugging: SOAP web services exchange data as XML envelopes. When a SOAP call fails, copy the raw XML request or response here to format and inspect the tag structure, find missing elements, and diagnose the issue.
- RSS and Atom feed inspection: Blog feeds, news aggregators, and podcast feeds use XML. Format a raw feed URL response here to read the item structure, channel metadata, and custom namespace elements.
- Android layout XML review: Android UI layouts are XML files. Minified or auto-generated Android XML can be difficult to read — format it here to see the view hierarchy clearly before editing.
- Build file inspection: Maven pom.xml and Gradle XML configuration files can become complex. Format them here to navigate the dependency tree and plugin configuration structure without an IDE.
Practical Input → Output Examples
1. Minified XML beautification
Input: "<root><user id="1"><name>Alice</name><email>alice@example.com</email></user></root>"
Output: Formatted XML with each element on its own line, indented by nesting depth
The hierarchical nesting becomes immediately visible — root → user → name/email — making the data structure easy to understand at a glance.
2. SOAP envelope inspection
Input: Raw SOAP envelope with CDATA sections and namespace declarations
Output: Formatted SOAP with Envelope/Header/Body structure clearly visible
SOAP envelopes have multiple namespace prefixes (soap:, xsi:, xsd:) — formatting makes the namespace assignments and element hierarchy readable for debugging.
3. XML validation output
Input: "<root><item>unclosed" (malformed, missing closing tags)
Output: Error — "Unexpected end of XML: missing closing tag for <item> and <root>"
The formatter validates XML well-formedness — unclosed tags, mismatched tags, and illegal characters are flagged with specific error messages.
Common Mistakes & Misunderstandings
Well-formed vs valid XML: "Well-formed" XML follows the XML syntax rules (properly closed tags, quoted attributes, no illegal characters) — any XML parser can parse it. "Valid" XML also conforms to a DTD or XML Schema (XSD) that defines the allowed elements and structure. This formatter checks well-formedness, not schema validity.
XML is case-sensitive: <Name> and <name> are different elements in XML. A common bug when hand-editing XML is accidentally changing the case of a tag — the closing </Name> must match the opening <Name> exactly. The formatter will flag mismatched tags.
Special characters must be escaped: The characters <, >, &, ", and ' have special meaning in XML and must be escaped as <, >, &, ", and ' when used as text content. Unescaped ampersands in URLs or data fields are the most common cause of XML parse errors.
XML vs HTML: HTML is not strict XML (despite XHTML being XML). HTML5 allows unclosed tags (<br>, <img>) and unquoted attributes — which would be invalid XML. Don't paste HTML into an XML formatter and expect it to be valid; use an HTML formatter for HTML.
How do I use the XML formatter?
Paste your XML into the editor, then click “Format XML” to beautify with consistent indentation or “Minify XML” to compress it. The result appears instantly in the same editor.
What’s the difference between Format and Minify?
Format XML prettifies and reorganizes whitespace for readability. Minify XML removes unnecessary spaces and line breaks while keeping tag structure intact.
Does this tool validate XML?
Yes. We attempt to parse your XML in the browser. If parsing fails, you’ll see a helpful error message indicating invalid XML.
Can I upload XML files directly?
Absolutely — use the Upload button to load a .xml file. You can then format, validate, or minify it and download the result.
Is my XML secure?
All processing happens locally in your browser. Your XML is never sent to our servers, ensuring privacy and security.