New free tool

XML Formatter, Validator & Minifier

Pretty print, validate, and minify XML snippets for feeds, sitemap samples, API payloads, config files, and documentation without sending the text to a server.

Quick answer

An XML formatter validates XML syntax and rewrites the document with readable indentation.

Use minify when you need compact XML after confirming the source is valid.

Best inputs for XML checks

Use complete XML when possible

A root element and well-formed opening and closing tags make validation meaningful.

Keep schema checks separate

Syntax validation is useful, but product-specific XML rules still need schema-aware validators.

XML input

Paste XML text. Validation and formatting run locally in your browser.

Try a common XML snippet

XML

Needs attention

XML validation is loading in the browser.

Output

Copy formatted or minified XML after validation passes.

<?xml version="1.0" encoding="UTF-8"?>
<catalog>
  <tool id="xml-formatter">
    <name>AscendLab XML Formatter</name>
    <privacy>browser-only</privacy>
    <features>
      <feature>format</feature>
      <feature>validate</feature>
      <feature>minify</feature>
    </features>
  </tool>
</catalog>

Example

Paste a sitemap XML snippet, format it for review, then use the sitemap checker if you need URL-level QA.

Assumption

The input is intended to be well-formed XML with one document root and matching tags.

Limitation

The browser parser checks syntax only; it does not validate XSD, DTD, namespaces, or business rules.

Suggested workflow