Is my XML data uploaded to a server?

No. Everything runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.

Are comments and CDATA sections kept?

Yes. The formatter parses in order-preserving mode, so comments, CDATA sections and attributes survive the round trip — only the whitespace changes.

Is my XML validated first?

Yes. Malformed XML (unclosed or mismatched tags) is rejected with the parser’s error message before any formatting happens.

100% local — your data never leaves your browser

XML Formatter & Beautifier — Free Online Tool

Pretty-print XML with consistent indentation, in your browser. Attributes, comments and CDATA preserved. Free and private: your data stays on your device.

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Indentation

XML input

XML output

Why format XML?

Machine-generated XML usually ships as a single unreadable line. Paste it above to pretty-print it with consistent indentation in an instant.

How it works

The formatter validates your XML locally, then re-emits it with the indentation you pick while preserving element order, attributes, comments and CDATA sections. An existing <?xml … ?> declaration is kept at the top of the output.

Frequently asked questions

Is my XML data uploaded to a server?: No. Everything runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.
Are comments and CDATA sections kept?: Yes. The formatter parses in order-preserving mode, so comments, CDATA sections and attributes survive the round trip — only the whitespace changes.
Is my XML validated first?: Yes. Malformed XML (unclosed or mismatched tags) is rejected with the parser’s error message before any formatting happens.