XML Formatter

A fast online tool to format and standardize XML markup for developers, enabling readable, consistently indented XML.

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956+
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 tool provides a deterministic, high-fidelity method to convert irregular XML into clean, readable markup. It accepts a raw XML string, preserves semantic content, and outputs indentation-consistent XML suitable for reviews, diffs, and integration into development pipelines.

Conceptually, the tool parses input with a standards-compliant XML parser, then re-serializes the document with user-selected indentation (2 or 4 spaces) and optional modes such as pretty print or minification. It preserves comments, CDATA sections, and processing instructions, ensuring the resulting output remains faithful to the original data.

Who benefits: software developers, testers, data engineers, and system integrators who frequently exchange XML payloads. Unique value comes from no external dependencies, fast processing, and the ability to validate and normalize structure in a single pass, reducing review time and diffs.

Core features include formatting with consistent indentation, optional minification, preservation of non-element content, and optional syntax validation. Typical use cases include preparing API payloads, formatting configuration files, transforming logs for readability, and creating reproducible samples for documentation.

How to Use

  1. Provide the XML input string in the input area.
  2. Select indentation level (2 or 4 spaces) and optional modes such as minify or validate.
  3. Trigger formatting to generate the formatted XML in the output pane.
  4. Review the output for correctness and preserved constructs like comments and CDATA.
  5. Copy or export the formatted XML for integration.
How to use online tool to format xml

Frequently Asked Questions

Find Quick Answers

What XML standards are supported?
The tool targets well-formed XML compatible with XML 1.0 and UTF-8 encoding by default, preserving structure and encoding unless otherwise specified.
Can it validate XML?
Yes. The tool can validate well-formedness and report structural errors, mismatched tags, and missing end elements when validation is enabled.
Does it preserve comments and CDATA sections?
Yes. Comments and CDATA content are preserved in the formatted output unless explicitly removed by user options.
Can I customize indentation levels?
Yes. Indentation can be set to 2 or 4 spaces, with optional modes to minify or validate as part of the formatting process.

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