Wyvek

XML Formatter

Beautify, minify & validate XML.

Free online XML formatter & validator

This XML formatter beautifies, minifies, and validates XML right in your browser. Paste a config file, an API response, an RSS feed, or any XML snippet and it is checked instantly — valid markup is confirmed as you type, while a mistake such as an unclosed or mismatched tag surfaces the parser's own error message so you can fix it fast. Then pretty-print the document with your preferred indentation, or collapse it down to a single line. Nothing you paste ever leaves your device.

How to format XML

  1. Paste or type your XML into the input box on the left.
  2. Watch the status line confirm Valid XML or describe any parse error live.
  3. Pick your indentation — 2 spaces, 4 spaces, or a tab — from the selector.
  4. Click Beautify to pretty-print, or Minify to strip the whitespace between tags.
  5. Use Copy to grab the formatted result, or Clear to start over.

Beautify vs. minify

Beautified XML is indented and spread across multiple lines, which makes a deeply nested document easy to scan while debugging. Minified XML removes every space and newline between tags to shrink the payload, which matters when you store markup or send it over the wire. Both keep your elements and text identical — only the layout changes. Working with other formats too? Try the JSON formatter for API data, or convert markup with the HTML to Markdown tool.

Private and dependency-free

Every operation uses your browser's native XML parser, so there are no network requests and no third-party libraries. That makes this a safe, fast way to validate confidential data such as SOAP messages, sitemaps, or internal configuration without ever exposing it.

Frequently asked questions

What does an XML formatter do?

An XML formatter takes raw, minified, or messy XML and re-prints it with consistent indentation and line breaks so the structure is easy to read. This tool also validates your XML as you type, so if a tag is unclosed or mismatched you see the parser's own error message right away.

What is the difference between beautify and minify?

Beautify (or "pretty-print") adds indentation and newlines so each element sits on its own line, which is ideal for reading and debugging. Minify strips the whitespace between tags to produce the smallest valid XML, which is best for storing or sending data over the network.

Is my XML uploaded to a server?

No. All parsing, formatting, and validation happen entirely in your browser using the built-in XML engine (DOMParser). Your data is never sent, stored, or logged, so it is safe to format private configuration files, API responses, and confidential documents.

Why am I getting an XML parse error?

The most common causes are an unclosed tag, a mismatched closing tag, a stray "<" or "&" that is not escaped, or more than one root element. XML is stricter than HTML — every tag must be closed and properly nested. The error line shows the parser's own description so you can jump to the problem.

Can I choose the indentation size?

Yes. Use the indent selector to beautify with 2 spaces, 4 spaces, or tab characters. Two spaces is a common, compact convention, while tabs suit teams that prefer tab-based indentation across their files.

Does formatting change my data?

Beautifying and minifying only change the whitespace between tags, never the element names, attributes, or text content. The output represents the same document — only its layout on screen changes.

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