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XML Formatter & Viewer

Indent:
XML Input0 chars / 0 lines
Formatted Output
Formatted XML will appear here...

Features

Format & Beautify

Automatically indent and format XML with configurable spacing (2, 4, or tab).

Minify

Remove unnecessary whitespace and compress XML to a single line for production.

Syntax Highlighting

Color-coded tags, attributes, values, comments, and CDATA sections for easy reading.

Tree View

Visualize XML structure as a color-coded, hierarchical tree view.

Last updated:

This tool is provided as-is for convenience. Output should be verified before use in any production or critical context.

Programmatic Access

XML Formatter & Viewer is also callable as a free HTTP JSON API at https://aidevhub.io/api/xml-formatter/ — GET with query parameters or POST with a JSON body, no authentication, CORS enabled, 50 requests/day per IP. Responses return { ok, tool, result, meta }. 

curl -s -X POST https://aidevhub.io/api/xml-formatter/ \
  -H "Content-Type: application/json" \
  -d '{"xml":"<root><item id=\"1\">alpha</item><item id=\"2\">beta</item></root>","mode":"format"}'

Machine-readable contract: /api/tool/xml-formatter.json All API endpoints: /agents/ LLM site index: /llms.txt

Agent Invocation

Best Path For Builders

Dedicated API endpoint

Deterministic outputs, machine-safe contracts, and production-ready examples.

Dedicated API

https://aidevhub.io/api/xml-formatter/

OpenAPI: https://aidevhub.io/api/openapi.yaml

GET /api/xml-formatter/ GET xml-formatter
POST /api/xml-formatter/ POST xml-formatter

Unified Runtime API

https://aidevhub.io/api/tools/run/?toolId=xml-formatter&a=...

GET and POST are supported at /api/tools/run/ with identical validation and limits.

Limit: 30 req / 60s, input max 256 KB.

How to Use XML Formatter & Viewer

  1. 1

    Paste your XML

    Copy your XML code into the textarea (minified, broken, or formatted). The tool immediately validates and formats it. Click 'Sample' for example XML.

  2. 2

    View formatted output

    Formatted XML appears in the right panel with syntax highlighting. Switch to Tree View to see nested structure visually. Errors show with line numbers.

  3. 3

    Format and validate

    Click 'Format' to beautify the XML. The validator will highlight syntax errors like unclosed tags, invalid characters, or malformed attributes.

  4. 4

    Copy or download output

    Use 'Copy to clipboard' for quick sharing, or download the formatted XML file for integration into your project.

Frequently Asked Questions

What is XML Formatter & Viewer?
XML Formatter & Viewer formats, beautifies, and validates XML documents. It features syntax highlighting, a collapsible tree view, and minification for cleaner XML output.
How do I use XML Formatter & Viewer?
Paste your XML into the editor. The tool instantly validates the syntax, formats it with proper indentation, and lets you toggle between a code view and an interactive tree view. Copy or download the result.
Does XML Formatter & Viewer store or send my data?
No. All processing happens entirely in your browser. Your XML data never leaves your device — nothing is sent to any server.
Can XML Formatter & Viewer minify XML?
Yes. In addition to beautifying XML, it can minify it by removing whitespace, newlines, and indentation. This is useful for reducing file size when embedding XML in API requests or config files.