Free online XML formatter, beautifier, and validator. Format XML with customizable indentation, minify for production, and validate syntax with line-level error reporting. 100% browser-based — your data never leaves your device.
100% browser-based — your data never leaves your device
Format, beautify, and minify XML with customizable indentation and real-time syntax highlighting.
Copy your raw XML data and paste it into the input textarea above.
Click Format to beautify with indentation or Minify to compress.
Click the Copy button to grab the formatted output for use in your project.
Drop a file here or click to browse
Ctrl+Enter to format
Format, beautify, and minify XML with customizable indentation and real-time syntax highlighting.
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XML Formatter is a free online xml tool that format, beautify, and minify xml with customizable indentation and real-time syntax highlighting. It works entirely in your browser — no downloads, no installations, and no server uploads required. enterprise developers, data engineers, integration specialists use XML Formatter when they need a fast, privacy-respecting way to process xml data without installing additional software. It supports capabilities such as xml syntax rules, common xml errors, multiple formats. Additional features include local processing. Common use cases include beautifying minified xml configuration files for readability, validating xml data before processing in data pipelines, formatting xml api responses for debugging and documentation. All processing happens locally using modern browser APIs, which means your data never leaves your device. This makes XML Formatter ideal for working with sensitive data, proprietary code, or any situation where privacy matters.
XML Formatter is a free online xml tool that helps you format, beautify, and minify xml with customizable indentation and real-time syntax highlighting. Key capabilities include xml syntax rules, common xml errors, multiple formats. All processing is done locally in your browser — no data is uploaded, stored, or shared with any server. There are no sign-ups, no file size limits, and no hidden charges. It is commonly used to beautifying minified xml configuration files for readability.
Copy your raw XML data and paste it into the input textarea above.
Click Format to beautify with indentation or Minify to compress.
Click the Copy button to grab the formatted output for use in your project.
| Category | Details |
|---|---|
| Input Limits | Maximum file size: Browser memory bound (~2 GB) |
| Node count: Unlimited (browser heap limit) | |
| Supported Formats | XML 1.0, XML 1.1, DTD, XSD, XSLT |
| Browser Engine |
|
All operations run entirely in your browser using built-in XML APIs. No server uploads, no data storage, and no third-party requests.
XML Formatter is ideal when you need to beautifying minified xml configuration files for readability without installing software or uploading data to a server. Since everything runs in your browser, there is no setup time and no risk of your data being stored on external servers. For one-off tasks and quick processing, XML Formatter is faster than setting up a local development environment or using a command-line tool.
No. All processing happens locally in your browser using the native DOMParser API. Your data never leaves your computer.
Format adds proper indentation and line breaks for readability. Minify removes all unnecessary whitespace to reduce file size for faster transmission.
The tool supports standard XML 1.0 syntax including elements, attributes, comments, CDATA sections, processing instructions, and namespaces.
Ensures proper nesting of tags, correct attribute formatting, and valid XML declaration.
Detects missing closing tags, mismatched case, invalid characters, and malformed attributes.
Supports all XML-based formats including XHTML, SVG, RSS, SOAP, and custom XML schemas.
All operations happen in your browser using the native DOMParser. No data is ever uploaded.
XML Formatter is useful in a variety of scenarios across different workflows:
Beautifying minified XML configuration files for readability
Validating XML data before processing in data pipelines
Formatting XML API responses for debugging and documentation
Invalid XML cannot be properly formatted. Run Validate first to catch syntax errors, then Format for readability.
Use the Minify option to remove whitespace from XML before sending over the network — it can reduce payload size by 30-50%.
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