XML Formatter
This free XML formatter checks XML syntax and presents the document with readable indentation or compact output. Paste configuration, feed or message XML to format it locally without sending the text to a server.
Your files and text stay on this device. Processing runs in your browser.
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Output
How to use the XML Formatter
Paste an XML document and process it to check its syntax and format its structure. Enable compact output to remove indentation between elements.
Up to 1 MB per input and 128 levels of nesting. This tool checks XML syntax, not an XSD schema. DTDs and entity declarations are rejected. Formatting can change indentation whitespace.
What the XML Formatter does
Make nested elements easier to inspect before reviewing a configuration change or debugging a message. Formatting is a presentation step, not a repair for invalid markup. A successful syntax check means the document can be parsed as XML; it does not establish that its values meet your application rules or an XSD schema.
Example and practical limits
Use the XML formatter to inspect a document containing text mixed with child elements. Meaningful spaces around that text must remain meaningful. The tool retains mixed text, comments, CDATA and xml:space content; compact output removes indentation between elements. Formatting can change indentation whitespace, so review a result before using it in a whitespace-sensitive workflow.
Frequently Asked Questions
Does the XML Formatter upload my files or text?
No. Processing happens on your device. The page downloads its application code, but your selected files and pasted text are not sent to a conversion service. Download the result before leaving the tab.
Does the XML formatter validate an XSD schema?
No. It checks whether the input has valid XML syntax. Schema validation, application rules and whether a message is acceptable to another system require separate checks.
Will mixed text, comments and CDATA survive?
The tool retains mixed text, comments, CDATA and xml:space content. It can change indentation whitespace between elements. Review the output when spaces are significant to a downstream process.
Why are DTD and entity declarations rejected?
These declarations are outside the supported input format. Remove them only when that is appropriate for your document; otherwise use a workflow that explicitly supports and validates those declarations.
Can I use the XML Formatter offline?
Load the page and its processing libraries first. Browser caching may allow later use without a connection, but offline availability is not guaranteed. Keep your source files and download finished results before closing the page.
Reshaping data by hand again?
A payload you have to fix in a browser tab every time is a job for code. We build the integrations, parsers and services that move data between systems, and we repair the ones that quietly corrupt it on the way through.
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