XML Formatter

The XML Formatter is a free online tool for formatting, beautifying, minifying, and validating XML documents instantly in your browser. Paste raw or minified XML and get properly indented, readable output with full syntax highlighting — no upload, no account, no server required.

What Is XML Formatting?

XML (Extensible Markup Language) is a widely-used data serialization format for web services, configuration files, RSS feeds, sitemaps, SOAP APIs, Android layouts, and office documents. Raw or minified XML is difficult to read because the nesting structure is collapsed into a single unbroken stream of tags. XML formatting adds consistent indentation and line breaks to reveal the document's hierarchy clearly.

A good XML formatter also validates the document structure. Malformed XML — such as unclosed tags, incorrect nesting, or illegal characters — will cause parsers and web services to fail silently or throw cryptic errors. Catching these issues before deployment saves debugging time.

How to Use the XML Formatter

Paste your raw or minified XML into the input area. The validator instantly checks whether the document is well-formed. Click Format to apply readable indentation, or click Minify to collapse the document into a single compact line for production use. Adjust the indent size between 2 and 4 spaces depending on your code style. Use the Copy button to move the result into your editor, or Download to save the file.

Common Use Cases

Backend developers use XML formatters to inspect SOAP API responses and request payloads. Frontend developers use them to debug RSS feeds, sitemaps, and SVG files. Android developers format XML layout files for review. DevOps engineers validate XML configuration files before deployment. Content teams format OpenDocument and Microsoft Office XML-based formats for inspection.

Privacy and Browser-Based Processing

The XML formatter runs entirely in your browser using the native DOMParser API. Your XML documents, whether they contain API credentials, configuration secrets, private data, or unpublished content, are never sent to any server. Closing or refreshing the page clears all input.

Tips for Better Results

Always format XML before debugging. A single formatting pass reveals structural problems like duplicate tags and incorrect nesting that are invisible in minified output. When validating SOAP envelopes, check that namespace prefixes are declared in the correct scope. For large XML files, format sections independently to locate errors faster. Remember that XML is case-sensitive — <Item> and <item> are treated as different elements.