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XML Formatter

Format, validate, and minify XML payloads instantly.

Input

Output

XML Formatter: complete usage guide

Format, validate, and minify XML payloads so integration, config, and feed documents are easier to review before release.

It parses XML input and rewrites it into readable indentation for fast structure inspection.

It can also minify XML output to reduce payload size for transport or fixture storage.

It surfaces syntax errors early so malformed tags and nesting mistakes are fixed before deployment.

It removes XML comments during formatting and minification to keep output focused on effective markup.

API payload

<user><id>42</id><roles><role>admin</role></roles></user>

Config snippet

<settings><feature enabled="true"/><retry count="3"/></settings>

Malformed sample

<items><item>alpha</items>

Formatted XML

<user>
  <id>42</id>
  <roles>
    <role>admin</role>
  </roles>
</user>

Minified XML

<settings><feature enabled="true"/><retry count="3"/></settings>

Validation note

Fix reported syntax errors before using output in production services.

Unclosed tag or mismatched nesting

Match every opening tag with the correct closing tag.

Multiple root nodes in one document

Wrap content in a single root element.

Invalid attribute quoting

Use double quotes for XML attribute values.

Encoding declaration mismatch

Ensure declared encoding matches actual file bytes.

Comment removal changes expected behavior

Keep required metadata outside comments before minifying.

Start with a minimal input for XML Formatter and verify baseline behavior first.
Make assumptions explicit: encoding, delimiter strategy, and timezone.
Change one variable at a time and compare output diffs.
Keep one verified output snapshot as a team reference.

Confirm XML Formatter output is deterministic across repeated runs with identical input.
Check boundary inputs (empty values, long fields, invalid characters).
Remove sensitive data before sharing output externally.
Verify final rendering on both desktop and mobile viewports.