This tool uses a structure-aware XML scanner instead of a broad whitespace replacement. It validates tag nesting and quoted attributes, preserves content inside text and CDATA nodes, and honors inherited xml:space="preserve" sections. Turn off comment removal when review notes must remain.
Private browser utility / Developer
Free XML Minifier
Runs entirely in your browser - no upload, no sign-up.
XML input
Minified XML
Paste XML to see the compact result
What does an XML minifier do?
An XML minifier compresses a document by removing indentation, line breaks between tags and optional comments while keeping elements, attributes, text, CDATA and processing instructions intact. Paste XML to get a validated compact result with exact UTF-8 byte savings. Everything runs locally in your browser.
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How to use
- 01Paste your XML
Add a complete XML document to the input editor, paste from your clipboard or load the example.
- 02Choose comment handling
Keep comment removal on for the smallest result, or turn it off when XML comments must stay in the output.
- 03Review the validation and savings
The tool checks well-formedness, then reports the original size, compact size, whitespace removed and exact UTF-8 bytes saved.
- 04Copy the minified XML
Copy the compact result into your build output, request body, test fixture or local project.
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Who it's for
- API developers reducing XML request and response payloads before testing or deployment.
- Release engineers stripping development comments and indentation from configuration files while keeping a readable source copy.
- Data teams compacting feeds, sitemaps and export fixtures before transport or storage.
- QA teams checking that edited XML remains well formed before it enters an integration test.
FAQ
Is this XML minifier free?
Yes. The XML minifier is free to use without an account, download or usage quota. Paste a document, review the live compact result and copy it directly from your browser.
Is my XML uploaded anywhere?
No. XML parsing, minification and byte measurement run locally in your browser. The document you paste is not sent to a server, which makes the tool suitable for private API payloads, feeds and configuration files.
How much XML can I minify?
There is no server-side upload limit because no XML leaves your device. The practical limit depends on available browser memory, but ordinary feeds, API payloads, SVG documents and configuration files should update immediately.
Does XML minification change text or attribute values?
No. The minifier preserves non-whitespace text, quoted attribute values, CDATA sections, processing instructions and DOCTYPE declarations. It removes formatting whitespace between tags and can remove comments. Sections marked with xml:space="preserve" keep their whitespace.
Can I keep XML comments?
Yes. Clear the Remove XML comments option and comments stay in the compact output. Leave it selected when development notes are not required in the deployed document and you want the smallest result.
Does this validate XML against an XSD or DTD?
No. The tool checks well-formed XML syntax, including one root element, matching tags, quoted attributes and closed comments or CDATA sections. It does not load external schemas or confirm business rules defined by XSD, DTD, Relax NG or Schematron.
Can I restore the original XML formatting later?
A formatter can add indentation to compact XML, but it cannot recover removed comments or the exact original line breaks. Keep the readable source in version control and treat the minified copy as build or transport output.