XML Formatter
Format, validate, and minify XML with proper indentation. Perfect for sitemaps, RSS feeds, SOAP responses, and configuration files. 📄 Make any XML readable — instantly
🔍 What Is an XML Formatter?
An XML Formatter (also called an XML beautifier or pretty printer) takes minified, compressed, or poorly indented XML and rewrites it with consistent indentation and line breaks so that the structure becomes readable. XML is used everywhere — sitemaps, RSS feeds, SOAP APIs, SVG files, configuration files, and enterprise data exchange. When XML is minified for production, reading it becomes nearly impossible without a formatter.
◆ This tool processes everything entirely in your browser — no XML is ever uploaded to any server. Your data stays private.
✨ Key Features
Pretty-Print XML
Format any XML document with proper indentation (2 spaces, 4 spaces, or tabs). Nested elements are indented according to their depth.
Validate XML
Check if your XML is well-formed using the browser's native DOMParser. Invalid XML returns the exact error and line number.
Minify XML
Strip all whitespace between tags to produce the smallest possible valid XML. Perfect for production sitemaps and API payloads.
Preserve CDATA & Comments
Optionally preserve <![CDATA[...]]> sections and XML comments exactly as written — no content is ever modified.
Attribute Sorting
Optionally sort attributes alphabetically within each tag — useful for diffing and standardizing configuration files.
Structure Report
See original size, formatted size, total node count, and maximum nesting depth — useful for understanding large XML structures.
💡 Why Use This XML Formatter?
100% Private & Secure
All processing happens in your browser. Your XML never leaves your device — no uploads, no servers, no tracking.
Works Everywhere
Use it on your phone, tablet, laptop, or desktop. The interface adapts to any screen size.
Instant Results
Formatting happens in milliseconds. No page reloads, no waiting — just paste and click Format.
Completely Free
No sign-up, no hidden fees, no usage limits. Use it as much as you need.
Accessible & Keyboard-Friendly
Full keyboard support, visible focus states, and semantic HTML ensure everyone can use the tool effectively.
Works Offline
Once the page loads, the tool works entirely offline — no internet connection required.
📖 How to Use the XML Formatter
- Paste your XML into the input area. You can also click Sample to load an example sitemap.
- Choose your options — indent width (2 spaces, 4 spaces, or tabs), plus optional CDATA/comment preservation and attribute sorting.
- Click Format to beautify the XML. The result appears instantly in the output panel.
- Click Validate to check if the XML is well-formed. Errors show the exact line and column.
- Click Minify to strip all unnecessary whitespace for a compact version.
- Copy or Download — use the buttons to save the output as a
.xmlfile or copy to clipboard.
💡 Pro tip: Press Ctrl+Enter to format instantly. This formatter uses the browser's built-in XML parser — the same parser used by every modern browser, so validation is authoritative.
🎯 Practical Use Cases
Sitemap Debugging
Format sitemap.xml files to verify URL structure, lastmod dates, and priority values before submitting to search engines.
RSS & Atom Feeds
Beautify RSS or Atom feeds to inspect feed structure, item metadata, and enclosure tags.
SOAP API Responses
Format SOAP responses from enterprise APIs to read the payload, fault codes, and nested envelope structure.
Configuration Files
Format XML config files (Maven, .NET, Android manifests) for easier editing and code review.
SVG Optimization
Format SVG files to understand shape structure, then minify them for smaller file sizes on the web.
Learning XML
Understand XML structure, namespaces, CDATA sections, and attribute usage by experimenting with sample data.
⚠️ Important Notes & Limitations
🔹 Well-formed XML only: This tool validates well-formedness (syntax correctness), not validation against a DTD or XSD schema. For schema validation, use a dedicated tool or your XML parser's schema validator.
🔹 Entity references preserved: Built-in entities like &, <, >, and numeric character references are preserved exactly. The tool never modifies the content of your data.
🔹 Namespaces preserved: XML namespaces (xmlns:foo) and prefixed tags (foo:bar) are handled correctly by the underlying DOM parser.
🔹 Large XML files: Very large XML documents (over 5 MB) may take longer to process. For best results with large files, work on a desktop browser.
❓ Frequently Asked Questions
An XML formatter takes minified or messy XML and rewrites it with consistent indentation and line breaks. You need one when debugging API responses, reviewing sitemap files, or working with any XML data that has been compressed for production. Without formatting, nested XML is nearly impossible to read.
Absolutely 100% safe. This tool processes everything in your browser using the native DOMParser API. No XML is ever sent to any server, stored, or shared with third parties.
Well-formed means the XML follows XML syntax rules — proper nesting, closed tags, correct attribute quoting, and so on. Valid means the XML also conforms to a specific DTD or XSD schema. This tool validates well-formedness, which is what most debugging requires. Schema validation is a separate, more advanced step.
Yes — by default, CDATA sections and comments are preserved exactly as written. You can toggle these off in the options if you want a cleaner output. CDATA is commonly used for embedding HTML, script, or raw text inside XML.
Yes! Once the page loads, the tool works entirely offline. You can bookmark it or save the page (HTML) for offline use. No internet connection is required after the initial load.
Completely free, forever. No sign-up, no registration, no hidden fees, no usage limits. This tool is proudly offered by GenieDevs as a free resource for the developer community.
👨💻 About the Author — GenieDevs
📦 Get the Standalone Version
📄 XML Formatter – Standalone Edition
Get the complete, self-contained HTML version of this tool. Perfect for offline use, intranet deployments, or embedding in your own projects. No dependencies, no external calls — just one HTML file that works anywhere.
🎯 Final Takeaway
The XML Formatter is your essential tool for making any XML readable, validating its structure, and minifying it for production. It uses the browser's native XML parser — the same parser powering every modern web application — so validation is authoritative.
✨ Try it now — paste your XML, click Format, and see the structure unfold. With its 100% browser‑based architecture, your data stays private.
🚀 Share this tool with your fellow developers. Explore our growing collection of free utilities at GenieDevs.