XML Formatter & Validator
Validate, format, and minify XML data online. Upload or paste XML, get instant error reporting with line numbers, and download the corrected file.
Formatted XML will appear here
How to use xml formatter & validator
- 1
Paste XML
Paste raw XML text or upload your .xml file into the editor.
- 2
Format
Click Format XML to beautify the tags and hierarchy.
- 3
Download
Check syntax validation and download or copy the formatted XML.
About the XML Formatter & Validator
XML is still the backbone of a lot of infrastructure that predates JSON's dominance — SOAP APIs, Android layout files, Maven/pom.xml build configs, RSS/Atom feeds, and plenty of enterprise system-to-system integrations. Unlike JSON, XML allows attributes alongside nested elements and has its own schema-validation ecosystem (DTD, XSD), which is part of why hand-edited XML is prone to unclosed tags and mismatched nesting that are hard to spot in a wall of unindented text.
This tool re-indents nested elements so the document hierarchy is visually obvious, reports the line number where a tag mismatch or malformed entity breaks parsing, and can minify a formatted document back down for transmission. It's most useful when you're debugging a SOAP request/response pair, tidying up a config file before a commit, or just trying to read a minified feed export.
Frequently Asked Questions
Is my XML data safe?
Yes. All data is processed securely in memory and never stored on the server. Your XML content is never logged or persisted.
How does real-time validation work?
The editor uses your browser's built-in DOMParser to detect XML syntax errors as you type. Errors are highlighted with line and column information after a 500ms debounce.
Can I upload large XML files?
Yes, the tool supports XML files up to 100MB. The editor will load the content and you can validate and format it instantly.
What does Format do?
Format (Pretty Print) converts your XML into a human-readable structure with proper indentation and line breaks. You can choose 2-space, 4-space, or tab indentation.
Can I download the formatted XML?
Yes. Once the XML is valid, click the Download button to save it as a .xml file.