EZ Formatter

XML Formatter

Format, validate, and beautify XML documents with syntax highlighting and error detection

Runs locally

XML Input

Formatted Output

Inspector

Paste well-formed XML — structure, tree and element paths appear here automatically

Advanced Options

Compare with another XML

Send this document to Data Diff and paste a second version to see what changed.

Validation with the exact error position

Validation runs on every keystroke using the browser XML parser. Well-formed documents get live counts of elements, attributes, text nodes and depth. Broken ones report the exact line and column, a probable cause, and a highlight at the failing position — not just \"not well-formed\".

Common XML errors this tool pinpoints

These mistakes account for most invalid XML. Each one is detected with a position and a probable cause:

Mismatched tags

<person> closed with </perso>. The parser reports \"Opening and ending tag mismatch\" with the line of both tags; the highlight jumps to the failing one.

Unclosed tag

A missing > or a missing end tag. Usually reported as \"expected >\" or \"premature end of data in tag X\" at the exact position.

Duplicate attribute

The same attribute name twice on one element, e.g. <item id=\"1\" id=\"2\">. Reported as \"Attribute redefined\" pointing at the second occurrence.

Invalid entity / raw &

A literal & or < inside text must be escaped (&amp;, &lt;). The parser reports \"EntityRef: expecting ;\" or \"not well-formed\" at the exact character.

Before / After

Minified API response on the left, the same document formatted with 2-space indent on the right. Structure, tree and paths update from the parsed document.

Before
<catalog><book id="1" category="fiction"><title>The Hobbit</title><author>J.R.R. Tolkien</author></book><book id="2" category="tech"><title>Refactoring</title><author>Martin Fowler</author></book></catalog>
After
<catalog>
  <book id="1" category="fiction">
    <title>The Hobbit</title>
    <author>J.R.R. Tolkien</author>
  </book>
  <book id="2" category="tech">
    <title>Refactoring</title>
    <author>Martin Fowler</author>
  </book>
</catalog>

XML quick reference (W3C XML 1.0)

  • Well-formed ≠ valid: well-formed means tags nest and close correctly; valid additionally means the document follows a DTD or XSD schema.
  • Five predefined entities: &lt; &gt; &amp; &quot; &apos; — a literal < or & in text is always an error.
  • Element and attribute names are case-sensitive and may carry namespace prefixes (ns:tag).
  • Exactly one root element; an XML declaration like <?xml version=\"1.0\" encoding=\"UTF-8\"?> must come first if present.
  • Comments <!-- … --> may not contain -- and may not be nested.

Next steps with this data

Formatting is the first step. Continue the workflow without leaving your browser:

Compare with another XML

Data Diff

 JSON Inspector

Continue with the converted JSON

 JSON → CSV

Export converted data to spreadsheet

Xml Formatter Formatting for Australian Developer Workflows

In Australia, Xml Formatter files drive APIs at Sydney fintechs, media pipelines in Melbourne, mining-tech in Perth, and coursework at Go8 universities like UNSW and Melbourne. Aussie teams typically follow Xml Formatter conventions aligned with APAC practice: 2-space indent for JS stacks, AEST/AEDT (Australia/Sydney) timestamps, AUD dollar amounts, and dd/mm/yyyy dates in business payloads. Our formatter handles Xml Formatter the way Australian engineers actually work — no registration, no upload, your data never leaves your device, which matters under the Privacy Act 1988 and Australian Privacy Principles. Whether you're cleaning an API response in Barangaroo, validating config for a Brisbane agency, or prepping data for a thesis in Adelaide, everything runs client-side and finishes in milliseconds — handy on NBN connections and mobile data alike.

Frequently Asked Questions

Common questions about Xml Formatter formatting answered

Yes. All Xml Formatter processing happens locally in your browser, with no upload to any server. This no-upload design aligns well with the Privacy Act 1988 and the Australian Privacy Principles for handling personal information.

The formatter preserves your original timestamps unchanged and works seamlessly with Australia/Sydney (AEST/AEDT), Australia/Melbourne, Australia/Brisbane, Australia/Perth and Australia/Adelaide timezones. Date values are not altered.

Absolutely. No registration, no login, no SSO needed. Just open the page and format your Xml Formatter immediately, with no usage telemetry tied to your identity — convenient for enterprise and government environments.

The formatter performs well-formedness checking and basic validation. It checks proper tag nesting, attribute syntax, and XML declaration compliance following W3C XML 1.0/1.1 specifications.

Yes, the built-in XPath tester lets you write and evaluate XPath 1.0 and 2.0 expressions against your XML document, highlighting matching elements and showing results instantly.

Yes, the formatter correctly processes XML documents with namespaces, preserving namespace declarations and prefixes while formatting elements and attributes properly.

Yes, the conversion feature lets you transform XML to JSON and back with intelligent mapping that preserves element structure, attributes, and data types.

The XML formatter supports files up to 50MB with optimized parsing algorithms, making it suitable for large configuration files, SOAP messages, and data interchange documents.

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