📄 XML Formatter
Paste XML to beautify it with clean indentation, validate it with clear error messages, or minify it to one line — entirely in your browser.
Frequently Asked Questions
Does the formatter validate my XML?
Yes. The input is parsed with the browser's native XML parser before formatting, so unclosed tags, mismatched elements, bad attributes or stray characters produce a clear error message instead of broken output. If it formats, it's well-formed XML.
What is preserved during formatting?
Element and attribute names, attribute values, text content, comments, CDATA sections, processing instructions and the XML declaration (<?xml version="1.0"?>) are all kept. Only whitespace between elements is changed. Empty elements are written in the compact <tag/> self-closing form.
What does Minify mode do?
Minify removes all whitespace between elements and joins the document onto a single line, which reduces file size for storage or transmission. Text inside elements is trimmed but otherwise unchanged, and comments and CDATA are kept.
Are namespaces and prefixed tags like <soap:Envelope> supported?
Yes. Namespace declarations (xmlns, xmlns:prefix) are ordinary attributes and prefixed element names are kept exactly as written, so SOAP envelopes, RSS/Atom feeds, SVG, and Maven pom.xml files all format correctly.
Can it format very large XML files?
Files up to a few megabytes format quickly since everything runs locally. Very large documents (tens of MB) may be slow because the whole document is parsed into a tree in browser memory.
Is my XML uploaded to a server?
No. Parsing and formatting run entirely in your browser — your XML never leaves your device, so it is safe for configuration files, API payloads and internal documents.