XML Formatter

Formats or minifies XML content, delivering clean, readable output for debugging, validation, and data exchange workflows in development environments.

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1,268+

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

This tool formats or minifies XML content, delivering consistent, machine-readable output for debugging, testing, and integration workflows. It supports well-formed XML documents and fragments, preserving encoding and semantic structure while adjusting whitespace and element presentation.
In format mode, output emphasizes readability with configurable indentation, line breaks between elements, and optional attribute wrapping. In minify mode, whitespace is collapsed to create compact payloads suitable for transmission or storage, while CDATA and attribute values remain intact.
Under the hood, a standards-compliant parser builds an internal tree, and a serializer emits text according to the selected style, ensuring deterministic results across environments.
Developers, QA engineers, and data engineers benefit from predictable formatting, easier diffs in version control, and reliable payload preparation for APIs and data pipelines. The tool supports preserving or removing XML declarations and DOCTYPE, and can selectively retain comments, depending on user settings.
Unique value lies in its focused scope and fast performance: it formats or minifies without performing schema validation or XSL transformations, reducing complexity while delivering consistent output for downstream processes.

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How to Use

Provide inputs with XML content in the xml_input field.
Choose mode: format or minify, and set options such as indent_size, indent_char, preserve_declaration, preserve_doctype, and remove_comments.
Run formatting to produce output.
Review formatted_xml or minified_xml in the result section.
Copy or export the output for integration or testing.

Frequently Asked Questions

Find Quick Answers

What input formats are supported?

The tool accepts XML content as plain text, including documents and fragments. It parses for well-formedness and preserves encoding, CDATA sections, and namespaces. If input is not well-formed, the tool returns a detailed error with location hints to guide correction.

Can I preserve XML declaration and DOCTYPE?

Yes. You can enable preservation of the XML declaration and DOCTYPE via the respective options. When enabled, these declarations are retained in the output, ensuring compatibility with consumers that rely on these declarations.

Is this a validator?

No. The tool focuses on formatting and minification, not full schema or DTD validation. It performs well-formed XML checks and reports structural errors but does not enforce schema compliance or perform XSL transformations.

How large can inputs be?

The tool is optimized for typical XML payload sizes used in development and testing. Extremely large documents may be subject to processing limits or streaming constraints. For very large files, consider streaming or chunked processing if supported by the deployment environment.

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