XML Formatter & Beautifier
Format, validate, and minify XML. Free, private, runs in your browser.
How this tool works
This tool parses the provided XML using the browser's DOMParser, walks the resulting DOM tree, and re‑serializes it with the chosen indentation. It can also minify by removing whitespace or simply validate the structure.
Reference: W3C XML Recommendation.
What Is XML Formatter & Beautifier?
The XML Formatter & Beautifier is a lightweight, client‑side utility that helps developers clean up and standardize XML documents. By parsing the input with the native DOMParser, it builds a DOM representation, then walks the tree to produce a consistently indented output. The tool also offers a minify mode that strips unnecessary whitespace, and a validation mode that checks for well‑formedness without sending data to any server. Because everything runs locally, your XML never leaves your browser, ensuring privacy and speed.
Common Use Cases
Developers often need to reformat XML for readability during debugging, code reviews, or documentation. This tool makes it easy to convert a single‑line or poorly indented XML blob into a clean, hierarchical view. It’s also handy for preparing XML payloads before committing them to version control, ensuring consistent formatting across a team. In CI pipelines, the minify option can reduce payload size for network transmission. Finally, the validation feature provides a quick sanity check for configuration files, SOAP messages, or any XML‑based data exchange.
Frequently Asked Questions
How does the formatter preserve XML namespaces?
The formatter walks the DOM tree generated by DOMParser, which retains all namespace declarations on elements and attributes. When re‑serializing, those namespaces are written exactly as they appear in the original document, ensuring no loss of information.
Can I format large XML files?
Because the processing is done entirely in the browser using native APIs, the tool can handle moderately large files (several megabytes). Extremely large files may cause performance issues or exceed memory limits, in which case a server‑side solution would be more appropriate.
Is my data sent to any server?
No. All parsing, formatting, and validation happen locally in your browser. The only network request is the optional subscription form, which you control by submitting your email address.