JS Tools

Online XML Formatter

Format XML with consistent indentation and line breaks for readable markup.

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How to use

  1. Paste or type your input in the left editor
  2. Adjust options in the toolbar if available
  3. Copy or download the output from the right pane

This free online tool runs entirely in your browser. No sign‑up, no server uploads.

About XML Beautifier

Format XML with consistent indentation and line breaks for readable markup.

The XML beautifier parses your input using an XML-aware tokenizer that identifies elements, attributes, text nodes, comments, CDATA sections, processing instructions, and entity references. The parser builds a document tree, validates well-formedness, and then serializes the tree back with consistent indentation. Each element is placed on its own line with child elements indented one level deeper. Self-closing tags, empty elements, and mixed-content elements are handled with appropriate formatting rules.

Use the left editor to enter your data. The output updates in real time. You can copy, clear, download, or expand either pane.

Tip: Use the search bar to quickly switch between tools.

Why this tool?

FeatureXML BeautifierTypical alternatives
Free online toolYesOften yes
Client‑side only (privacy)YesVaries
No sign‑up requiredYesVaries

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FAQs

Does the XML beautifier handle namespaces and prefixed elements?
Yes. XML namespaces, namespace prefixes (like xsl:template or soap:Envelope), and namespace declarations (xmlns attributes) are fully preserved during formatting. The beautifier treats prefixed elements identically to unprefixed ones.
Can I format XML with CDATA sections?
CDATA sections (<![CDATA[...]]>) are preserved exactly as-is during formatting. The beautifier does not modify content within CDATA blocks, ensuring that embedded scripts, HTML, or other raw text remain unchanged.
Does the beautifier handle XML declarations and processing instructions?
Yes. The XML declaration (<?xml version="1.0"?>), processing instructions (<?php ... ?>, <?xml-stylesheet ... ?>), and DOCTYPE declarations are all recognized and formatted on their own lines at the top of the document.
Can I format SOAP XML messages or web service responses?
Absolutely. SOAP envelopes, headers, and body elements are formatted with proper indentation showing the message structure. This is invaluable for debugging SOAP web service requests and responses.
Does the formatter validate XML well-formedness?
The beautifier validates that the XML is well-formed during parsing. Mismatched tags, unclosed elements, and invalid characters are reported with their positions so you can fix structural errors before formatting.