XML Formatter
Format compact XML into an indented, readable structure.
How to Use the XML Formatter
Paste compact or difficult-to-read XML into the input field and select Format XML. The tool parses the markup, inserts line breaks and indentation, and returns a cleaner representation that is easier to inspect. Formatting is especially helpful when reviewing API responses, configuration files, feeds, exported data or test fixtures.
What XML Formatting Does
XML uses nested elements to describe structured information. A valid XML document can technically be written on one line, but that makes parent-child relationships difficult to follow. Formatting adds visual whitespace without intentionally changing element names, attribute values or the logical hierarchy. The result is designed for human readability rather than file-size reduction.
Practical Example
Consider a compact snippet containing a catalog with several product elements, each with a name and price. In a one-line version, locating the closing tag for each product can be tedious. After formatting, the catalog appears at the outer level, each product is indented one level, and its child fields are indented again. This makes missing tags and unexpected nesting easier to spot.
Common Uses for an XML Formatter
Developers often format XML while debugging web services, SOAP messages, RSS or Atom feeds, Android resources, Maven or configuration files and data exchanged between systems. A readable layout can also help during code reviews because changes to a specific node are easier to identify than in a minified document.
Factors That Affect the Result
Valid XML produces the most predictable formatting. Malformed tags, mismatched opening and closing elements, broken entities or invalid characters can prevent parsing. Namespaces and attributes are preserved, while mixed content and CDATA sections can require extra care because whitespace may sometimes be meaningful inside text-oriented XML. Very deeply nested documents can also become visually wide even after indentation.
Formatting vs. Minifying XML
Formatting and minifying serve opposite goals. Formatting expands the document for readability, while minifying removes unnecessary whitespace to make the markup more compact. A useful workflow is to format XML while editing or debugging it, then minify a final copy when a smaller payload is desirable.
Frequently Asked Questions
Does formatting change XML data?
The formatter is intended to change presentation rather than the underlying element structure. Always review whitespace-sensitive text if your XML application treats spaces as meaningful content.
Can formatted XML be minified again?
Yes. After reviewing or editing the formatted document, use an XML Minifier to remove unnecessary visual whitespace.
Why does invalid XML fail to format?
An XML parser needs a well-formed document. Missing closing tags, malformed attributes or invalid entities can stop parsing until the syntax is corrected.