XML Canonicalizer

How to use this developer tool

1. Paste the XML input or load a local file.
2. Choose the options that match the source format.
3. Select Canonicalize XML or press Ctrl/Cmd + Enter.
4. Review the summary and export the output you need.

What this developer tool does

This page parses XML, optionally removes comments and blank-only text nodes, sorts attributes, and serializes a deterministic result. The main output is ready to copy, while the structured exports retain the diagnostic fields used in the summary.

This is a practical deterministic normalizer, not a certified implementation of W3C C14N, Exclusive C14N, or XML Signature canonicalization.

Example

Input

<?xml version="1.0"?>
<root z="2" a="1">
  <!-- note -->
  <item b="x" a="y"></item>
</root>

Running the sample produces a tool-specific report in the output panel, with counts that correspond to the parsed records or nodes.

Use cases

• Check incoming XML before an import or migration.
• Create repeatable fixtures for parser and ETL tests.
• Inspect structure without installing a command-line package.
• Export a compact report for code review or issue tracking.

Tips for reliable output

• Keep an untouched copy of the source before transforming it.
• Test one representative edge case as well as the happy path.
• Review quoted fields, Unicode, and empty values explicitly.
• Use the JSON export when another program will consume the report.
• Re-run the tool after changing any parsing option.

Processing details

Attributes sort first by namespace URI and then by local name. The browser serializer supplies consistent escaping and empty-element syntax. Processing time is measured in the browser and the original input is left unchanged.

This is a practical deterministic normalizer, not a certified implementation of W3C C14N, Exclusive C14N, or XML Signature canonicalization.