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XML Formatter — Free Browser-Based XML Beautifier & Minifier

Beautify or minify XML using your browser's native parser. No dependencies, fast and accurate.

Free No signup Client-side Privacy friendly Updated

How to use

  1. 1 Paste your XML.
  2. 2 Pick Beautify for readable indented output, or Minify to collapse whitespace.
  3. 3 Copy or download the result.

Why use this tool

  • Uses your browser's native DOMParser — no external dependency.
  • Catches malformed XML and surfaces the error.
  • Pure client-side — your data stays private.
  • Handles namespaces, CDATA, processing instructions.

Frequently asked questions

Does it validate against a DTD or XSD?

No — well-formedness only (matched tags, valid entities, single root element). For schema validation, use a dedicated XSD validator.

Will CDATA sections be preserved?

Yes — CDATA, comments, and processing instructions all round-trip correctly.

Why does my output show "parsererror"?

Your input is not well-formed XML. Check for missing closing tags, unescaped < or & in text content, or mismatched quotes in attributes.

What is XML Formatter?

An XML Formatter is a tool that beautifies or minifies XML documents using the browser's native parser. The beautify mode re-indents elements and attributes into a readable hierarchy, while the minify mode strips whitespace to reduce size. Because it relies on the built-in parser with no external dependencies, it processes XML quickly and accurately, entirely client-side on the device.

Features

Beautify & minify

Re-indent XML into a readable tree, or strip whitespace to reduce file size.

Native-parser validation

Uses the browser's built-in XML parser, so malformed markup is rejected the same way a browser would.

100% private

Runs entirely client-side — your XML is never uploaded.

Example

Input

<note><to>Zerethon</to><tag>xml</tag></note>

Output

<note>
  <to>Zerethon</to>
  <tag>xml</tag>
</note>

Common use cases

  1. 1

    Read API & SOAP responses

    Indent a compact XML or SOAP payload to inspect its structure.

  2. 2

    Prepare config, RSS & SVG

    Format XML configuration, RSS feeds, or SVG source before review or editing.

  3. 3

    Shrink for transport

    Minify XML to cut payload size before sending it over the network.

How XML Formatter compares to alternatives

XML Formatter versus typical browser and desktop alternatives — features compared at a glance.
Feature Zerethon Tools Typical online tools Desktop apps
Signup required No Sometimes No (IDEs)
Data leaves device No Yes No
Beautify + minify Both Sometimes Both
Native-parser validation Yes Sometimes Yes
Free Yes Yes Often paid
Works offline Yes (after load) No Yes
Summary

Zerethon's XML formatter beautifies or minifies XML in your browser using the native DOMParser and serializer. Beautify re-indents elements and attributes into a readable hierarchy; minify strips whitespace to shrink the document. With no external dependencies it is fast and standards-accurate, and nothing is uploaded.

Category
Developer
Pricing
Free
Privacy
Browser-based
Signup
Not required

References

Privacy

Your data never leaves your browser unless explicitly stated. XML Formatter runs entirely client-side — no server upload, no logging, no tracking of your input.

Compare

JSON vs XML YAML vs XML

Learn the basics

What is XML?

How-to guides

How to convert xml to json

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