XML Formatter

Formats raw XML into readable, nicely indented output for developers, testers, data engineers, and analysts.

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860+
Total Calculations Run
< 15ms
Browser Execution Speed
100%
Client-Side Privacy
4.9 / 5.0
User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how XML Formatter processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}
Computed Result { "id": 1, "status": "active", "roles": [ "admin" ] }
Execution Mode Client-Side In-Browser JS
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About This Tool

The XML Formatter converts compact or minified XML into a clean, human-readable form with consistent indentation. It preserves content, attributes, and structure while applying user-specified whitespace rules. This tool is valuable for developers, testers, and data engineers who validate or diff XML payloads in logs, configurations, and data exports.
Conceptually, it parses the XML into a tree and re-serializes it with a chosen indentation depth and style, ensuring a deterministic output that remains faithful to the original data. It supports namespaces, CDATA, comments, and prologs to ensure fidelity across common XML variants. The primary value lies in predictable formatting, enabling easier comparison, review, and documentation of XML documents and configurations.
Beneficiaries include software engineers, QA teams, data integration specialists, and operations engineers who rely on readable XML for debugging, versioning, and automation tasks. Unique value comes from stable, configurable formatting that integrates into pipelines and minimizes diffs caused by whitespace. Core features include strict parsing, indentation control, and deterministic serialization; optional handling of empty elements and attribute order; and safe processing without external schema validation.

How to Use

  1. Provide inputs: supply a raw XML string in the xml_input field.
  2. Choose formatting options: set indentation type (spaces or tabs) and indentation size, and decide on line-break handling.
  3. Run calculation: trigger the formatter to parse and serialize the XML.
  4. Review outputs: read the formatted XML in the output field or export as needed.
  5. Save or copy: copy the formatted result for use in code reviews, diffs, or documentation.
How to use xml formatter w3schools

Frequently Asked Questions

Find Quick Answers

What does this tool do?
The tool formats XML input into a readable, properly indented structure while preserving content and attributes. It can handle minified XML and produce a stable, diff-friendly output.
What if the XML is invalid?
If the input is not well-formed, the formatter reports parsing errors with line and column details and returns no formatted output until the input is valid.
Can I customize indentation and line breaks?
Yes, you can configure indentation size and type (spaces or tabs) and choose how line breaks are applied in the output for consistency with your coding standards.

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