inicio/dev/xml-formatter

XML Formatter & Beautifier Online

Format, validate & minify XML with syntax highlighting

Input XML

Output

Formatted XML will appear here...

Cómo usar XML Formatter

1
Paste your XML
Enter minified or unformatted XML in the input panel.
2
Choose indentation
Select 2 spaces, 4 spaces, or tabs.
3
Format
Click Format to see the beautified output, or copy it directly to your clipboard.

Preguntas frecuentes

Is my data safe?

Yes. All processing happens entirely in your browser. Your data never leaves your device and is never uploaded to any server.

Does this validate my XML?

Yes. The formatter validates well-formedness: all tags must be properly closed, attributes must be quoted, and there must be a single root element. It does not validate against an XSD schema — it checks structural correctness, not business rules.

What is the difference between XML and HTML?

XML is a strict data format where every tag must be closed and attribute values must be quoted. HTML is more lenient. XML is used for data exchange and configuration; HTML is for rendering content in browsers.

Can I format very large XML files?

Yes, for reasonably sized files. Very large XML documents (multi-MB) may take a moment to process. For files over 10 MB, consider a desktop XML editor for better performance.

What is SOAP and why does it use XML?

SOAP (Simple Object Access Protocol) is a messaging protocol used by many enterprise and legacy web services. It uses XML as its message format because XML is platform-neutral, extensible, and has strong tooling support across programming languages.

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¿Qué es XML Formatter?

Format and beautify XML documents instantly with configurable indentation. Paste minified or unreadable XML and get clean, indented output in one click. Validates XML syntax and highlights errors. Essential for working with SOAP APIs, RSS feeds, configuration files, and data exports. All processing happens in your browser — your XML data never leaves your device.

¿Por qué usar XML Formatter?

Instant formatting — paste minified or messy XML and get clean, readable output immediately.
Syntax validation — invalid XML is caught with a clear error message indicating the problem location.
Configurable indentation — choose 2 spaces, 4 spaces, or tabs to match your project's style.
Client-side processing — your XML (which may contain sensitive config or API data) never leaves your browser.
No installation — works in any modern browser without plugins.

Casos de uso de XML Formatter

SOAP API debugging

Format XML request and response payloads from SOAP web services to make them readable for debugging.

RSS and Atom feed inspection

Beautify RSS or Atom feed XML to inspect feed structure, validate entries, and debug feed parsing issues.

Configuration file editing

Format Maven pom.xml, Spring beans, Android manifests, or other XML configuration files for easier reading and editing.

Data export inspection

Format XML exports from CRMs, ERPs, or legacy systems to understand data structure before importing into another system.

Consejos y buenas prácticas

💡XML is case-sensitive — <Title> and <title> are different tags. Check case carefully when debugging XML errors.
💡All XML documents must have exactly one root element. If you paste multiple root elements, the formatter will report an error.
💡XML attribute values must always be quoted. Unquoted attribute values are a common source of XML parsing errors.
💡Use the formatted output to spot unclosed tags — the indentation makes nesting structure immediately visible.

Cómo funciona

The formatter uses the browser's DOMParser with 'application/xml' to parse the input, which uses the native XML engine built into every browser. This ensures strict compliance with the XML specification. Formatting is performed by recursively traversing the DOM tree and building indented output with configurable spacing. Parse errors are surfaced from the browser's XML parser and displayed with the line and column where the error occurred.