XML Formatter
Indent and check XML documents.
Runs entirely in your browser — your data is never uploaded to any server.
How it works
- Paste your XMLA feed, config file or API response.
- Format itWell-formedness is checked as it parses.
- Copy the resultProperly nested and readable.
What this tool does
- Well-formedness checking with clear error messages
- Configurable indentation
- Optional self-closing tags for empty elements
- Attributes, CDATA and comments preserved
Frequently Asked Questions
Every tag is closed, elements nest correctly, and there is exactly one root element. It is separate from validity, which requires a schema.
No. It checks structure only — schema validation needs your schema file.
No. HTML tolerates unclosed tags that XML rejects. Use the HTML Formatter for markup.
Yes, comments and CDATA sections are preserved.
Privacy and security
Your input is processed by JavaScript running inside your browser. Nothing you paste is sent over the network, logged, or stored — which is what makes this safe to use with production data. If you want to check this yourself: open your browser’s developer tools, switch to the Network tab, and use the tool — you will see no request carrying your file or input leave the page.