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XML Formatter & Beautifier — Format XML Online Free

100% Private - Processed Locally

Paste XML

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Processed locally in browser

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Offline· no network access
Formatted XML
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Try also:JSON Formatter & ValidatorSecure XML to CSV ConverterXML to JSON Converter
What is the XML Formatter & Beautifier?


Format XML and beautify XML documents instantly — this free online XML formatter and beautifier is a browser-based developer tool that transforms minified, compressed, or unreadable XML into properly indented, human-readable form while simultaneously validating the structure against strict XML syntax rules. Whether you need to format XML online quickly or validate a complex SOAP envelope, this tool handles it entirely in your browser. It is an essential utility for developers working with legacy enterprise systems, SOAP web services, RSS feeds, Maven build files, Android resource files, and any other system that produces or consumes XML.


The tool uses your browser’s native DOMParser API to parse the XML — the same standards-compliant parser your browser uses to render HTML and process SVG files. This means you get genuine, strict XML validation: malformed documents are rejected with a specific error message, not silently accepted and rendered incorrectly. When the parse succeeds, a local formatting function walks the parsed DOM tree and reconstructs the XML string with consistent indentation, one element per line, and proper handling of text nodes, attributes, comments, and CDATA sections.


Because the entire process runs inside your browser, your XML data never leaves your machine. This is critically important for the types of XML developers commonly format: SOAP API responses may contain internal service architectures, user data, or authentication tokens; Maven pom.xml files reveal dependency versions and internal repository URLs; and configuration XML files may expose internal infrastructure details. Formatting these locally eliminates the risk of accidentally leaking them through a third-party service.


How to Use the XML Formatter


    

  1. Paste your XML document into the left input panel. This can be any valid (or invalid) XML — a minified SOAP response, a database export, an RSS feed, a Maven configuration file, or any other XML document. The tool accepts the complete document or any fragment.
    2. 

  2. The formatter instantly validates and parses the input using the browser’s DOMParser. If the XML is well-formed, it appears formatted with proper indentation and syntax highlighting in the right panel. If there are errors, the panel shows the specific problem — for example, “Unclosed tag <user> on line 14.”
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  3. Fix any validation errors reported by the tool. Common XML errors include: missing closing tags, mismatched tag names (case-sensitive in XML), unquoted attribute values, & and < characters that must be escaped as &amp; and &lt;, and multiple root elements (XML requires exactly one root).
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  4. Review the formatted output with syntax highlighting. Element names, attributes, attribute values, text content, and comments are colored differently so you can scan the structure quickly and verify the data looks correct.
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  5. Copy or download the formatted XML. Click Copy to copy the indented XML to your clipboard, or click Download to save it as a .xml file. If you need to convert the XML to a different format, try our XML to CSV or XML to JSON converters.
    6. 



Common Use Cases


SOAP API debugging: Legacy web services used in banking, insurance, healthcare, and enterprise software return SOAP responses — XML payloads wrapped in envelope and body elements with multiple namespace declarations. When a SOAP call returns unexpectedly or you’re integrating with a new service, pasting the minified response into this formatter instantly reveals the full structure, making it easy to identify missing fields, error codes, and malformed data.


RSS and Atom feed inspection: Publishers, content aggregators, and podcast platform developers frequently need to inspect RSS or Atom feeds to verify that the format is correct before submitting to feed directories or podcast platforms. Formatting the feed XML makes it easy to check required elements (title, link, description, pubDate) and spot any encoding issues or malformed entries.


Maven and Gradle build file review: Java project configuration in Maven’s pom.xml files can grow extremely complex, with nested dependency declarations, plugin configurations, and profile overrides. Formatting these files with this tool before committing changes makes pull request reviews far more readable and helps catch configuration mistakes before they cause build failures.


Android resource file editing: Android applications use XML resource files for layouts, strings, colors, styles, and drawables. These files are often generated or modified by build tools and may end up minified or with inconsistent indentation. Formatting them before code review or committing ensures consistent style and makes structural changes easier to review.


Data migration validation: When migrating data between systems — for example, exporting from an older CRM and importing into a new platform — the export is often in XML format. Formatting a sample of the exported XML lets you verify the structure matches the import schema before running the full migration, avoiding costly errors that are difficult to reverse at scale.


How Browser-Only Processing Works for This Tool


When you paste XML into the input panel, the browser’s built-in DOMParser is called with the "text/xml" MIME type. This runs the browser’s native XML parser — a compiled, standards-compliant implementation that validates the document against the XML 1.0 specification. The parser produces a DOM tree (the same data structure the browser uses internally for HTML pages) or a parse error document if the XML is malformed.


If parsing succeeds, a JavaScript function walks the DOM tree recursively: for each element node, it writes the opening tag (with all attributes preserved), then recurses into child nodes, then writes the closing tag — inserting the appropriate indentation at each level. Text nodes, comment nodes, CDATA sections, and processing instructions are each handled according to their type. The final formatted string is passed to CodeMirror for syntax highlighting in the output panel.


No data leaves your browser at any point. You can verify this by opening DevTools (F12), going to the Network tab, pasting XML, and observing the complete absence of outbound network requests carrying your document content.


Example Input


<user><id>1</id><name>Alice</name></user>


Example Output


<user>
  <id>1</id>
  <name>Alice</name>
</user>


Why use this offline formatter?


XML payloads often carry enterprise data, SOAP requests, or configuration files. This local formatter guarantees that your proprietary enterprise structures are never transmitted to a third-party server.


Frequently Asked Questions
Does this tool validate XML?▼
Yes, it uses your browser's native DOMParser to strictly validate the XML structure. Any syntax errors — such as unclosed tags, mismatched element names, missing quotes around attribute values, or illegal characters — will be reported immediately with details about what went wrong, so you can fix the problem without guessing.
Is my XML data uploaded anywhere?▼
No. The formatting and validation happen entirely locally in your browser's memory, using the browser's built-in DOMParser API. Your XML document never leaves your device — there are no network requests, no server processing, and no data logging. This makes it safe to use with sensitive enterprise XML, SOAP payloads, and confidential configuration files.
What types of XML does this formatter support?▼
This formatter supports any well-formed XML document, including SOAP envelopes, RSS and Atom feeds, Maven pom.xml files, Android resource files, SVG documents, XHTML, and generic data export XML from databases and ERP systems. As long as the document follows standard XML syntax rules, the formatter will parse, validate, and indent it correctly.
Can I format large XML files in the browser?▼
Yes. Because the formatting runs inside the browser's DOMParser and JavaScript engine, there are no server-imposed file size limits or upload restrictions. The practical limit is your device's available RAM. For typical XML payloads encountered in API debugging, configuration review, and data migration work — even files with thousands of nested elements — the formatter handles them instantly.
How does XML formatting differ from JSON formatting?▼
XML and JSON are both text-based data formats, but XML uses a tag-based hierarchy with attributes and namespaces, while JSON uses a key-value structure with arrays. XML formatting involves inserting newlines and indentation between opening and closing tags, while preserving text nodes, attributes, comments, and CDATA sections. This tool handles all of those XML-specific elements correctly, unlike generic formatters that may strip or corrupt them.
What is the difference between XML beautifying and XML minifying?▼
Beautifying (formatting) adds indentation and line breaks to make the XML structure readable by humans — useful for debugging and code review. Minifying removes all non-essential whitespace to produce the most compact possible representation — useful for reducing network payload size. Both represent exactly the same data. Use this formatter for readability, and minify before production deployment where payload size matters.
Can this tool format XML with namespaces?▼
Yes. XML namespaces (the xmlns: prefix declarations and namespace-qualified element names) are fully preserved during formatting. The DOMParser handles namespace resolution correctly, and the output formatting respects the namespace prefixes exactly as they appear in the original document. SOAP envelopes with WSDL namespaces, XSLT stylesheets, and namespace-heavy enterprise XML formats all format correctly.