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XML Formatter & Validator

Prettify, format and validate XML documents with syntax checking and indentation.

Indent

Minify

Input XML

Formatted XML

How to Use

Paste XMLPaste your XML document into the Input field on the left.

Choose indentSelect 2 spaces, 4 spaces, or tab for indentation.

Click FormatYour XML is validated and formatted with proper indentation.

Check errorsIf the XML is invalid, a clear error message shows the problem and location.

Copy resultUse the Copy button to copy the formatted XML to your clipboard.

📌 All processing happens locally in your browser using the built-in XML parser. Nothing is uploaded.

About XML Formatter & Validator

XML Formatter & Validator is a free, browser-based utility built for developers and engineers who need a fast, reliable way to prettify, format and validate xml documents with syntax checking and indentation. Whether you're debugging an API response, preparing data for deployment, or validating configuration files, this tool handles the job in seconds — with zero server calls. Everything runs locally in your browser, so your source code and data stay private.

Frequently Asked Questions

Common XML errors include: unclosed tags, mismatched tags, missing root element, unescaped special characters (< > &), missing attribute quotes, and invalid character encoding.

XML is strict — every tag must be closed, attributes must be quoted, and the document must be well-formed. HTML is more lenient. XML is used for data exchange (APIs, config files), while HTML is for web pages.

Minify mode removes all whitespace between tags to produce the most compact XML output. This is useful for reducing file size for storage or transmission.

A well-formed XML document has exactly one root element, all tags are properly closed and nested, attribute values are quoted, and special characters are escaped. This tool validates well-formedness.