Free Online XML Formatter
XML remains essential for enterprise integrations, SOAP APIs, Android layouts, RSS feeds, and configuration files. Minified or single-line XML is nearly impossible to debug when a namespace is wrong or a tag is unclosed. Our free XML formatter pretty-prints any XML document with proper indentation and line breaks.
Paste raw XML from an API response, log file, or config and get human-readable output instantly. Validation highlights syntax errors so you can fix malformed documents before they break your pipeline.
How to Use the XML Formatter
Paste your XML into the input field and click format. The tool indents nested elements consistently, places attributes on the same line as their tags, and separates sibling elements with clear line breaks. If the XML is malformed, you will see an error indicating the problem area. Copy the formatted output for documentation, debugging, or version control diffs.
Why XML Formatter Matters
Readable XML reduces debugging time for enterprise integrations that still rely on SOAP, SAML, and legacy EDI systems. Developers working with Android layout XML, Maven POM files, or SVG exports benefit from formatted output in code reviews. Pretty-printed XML also produces cleaner diffs in Git when configuration files change.
Who Uses a XML Formatter?
- Integration developers inspect SOAP responses and SAML assertions during SSO debugging.
- Android developers format layout XML files for readability in code reviews.
- DevOps engineers pretty-print Kubernetes manifests and Maven POM files.
- QA testers compare API response XML against expected fixtures.
- Technical support read customer-provided XML configs without external tools.
Key Features
- Pretty-print XML with configurable indentation
- Syntax validation with error messages
- Handles namespaces, attributes, and CDATA sections
- Client-side processing — XML stays in your browser
- One-click copy of formatted output
Tips for Getting the Most From This Tool
Always format XML before comparing two versions — unformatted diffs hide single-character attribute changes. Watch for default namespace declarations that affect XPath queries. For large XML files over a few megabytes, consider splitting or using a desktop tool for performance.
Frequently Asked Questions
Does this validate XML against a schema?
The formatter checks well-formedness (proper tag nesting and closing). XSD or DTD schema validation is separate from pretty-printing.
Can I format minified XML from an API?
Yes. Paste single-line XML from API responses or logs and the formatter expands it with proper indentation.
Is my XML uploaded anywhere?
No. All formatting happens locally in your browser.
Does it handle large XML files?
It works well for typical config and API response sizes. Very large files (10MB+) may be slow in the browser.