XML Formatter & Validator – Free Online Tool

Format, validate, and minify XML documents. Instant syntax error detection with line numbers. 100% browser-based.

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Features

✨

Instant Formatting

Paste raw or minified XML and see it beautifully indented in real time.

🔍

Error Detection

Syntax errors are caught with clear messages pointing to the exact line and column.

🗜️

One-Click Minify

Compress XML to its smallest form by removing all unnecessary whitespace.

🔒

Privacy First

All processing is local in your browser using the native DOMParser API. Your XML never leaves your device.

📋

Copy with One Click

Copy the formatted or minified result to your clipboard instantly.

📄

Custom Indentation

Choose between 2-space, 4-space, or tab indentation for your formatted XML.

How to Use

1

Paste Your XML

Copy any XML document and paste it into the input panel.

2

View Formatted Output

The formatted XML appears instantly with proper indentation. Any errors are highlighted.

3

Format or Minify

Toggle between formatted (pretty-printed) and minified output.

4

Copy or Download

Copy the result to your clipboard or download it as an .xml file.

Frequently Asked Questions

What is XML formatting?
XML formatting (also called XML beautifying or pretty printing) adds proper indentation and line breaks to make XML human-readable. XML minifying removes all unnecessary whitespace for compact storage or transmission.
Can this tool validate XML?
Yes. The tool uses the browser's native DOMParser to parse the XML. Invalid XML triggers an error message with the line and column number where the problem occurs.
What indentation options are available?
You can choose 2-space indentation, 4-space indentation, or tab characters for the formatted output.
Does it support XML namespaces?
Yes. Namespaces, prefixes, and all standard XML features are preserved in the formatted output.
Is my data sent to a server?
No. All formatting, minifying, and validation is done locally in your browser using JavaScript's DOMParser API. Your XML never leaves your device.

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