What this tool actually changes
Highlight XML syntax and optionally show line numbers and special symbols.
This kind of tool is most helpful when manual editing would be slower, more error-prone, or too opaque to verify quickly.
What formatting actually changes
Highlight XML rewrites the same content into a layout that is easier to read. The important point is that prettifying should change presentation, indentation, and spacing, not the meaning of the data itself.
XML tools react to nesting, attributes, repeated nodes, and malformed tags. Structure matters more than appearance.
This tool is deterministic: the same input and the same settings produce the same output every time. All processing happens in your browser, so your input stays on your device during the transformation.
Where this tool earns its keep
Improve XML readability.
Debug XML content.
Review large XML files.
Examples
Quick before and after
Input
Highlight XML input:
Email: john.doe@example.com
Status: active
Output
Highlight XML output:
Email: john.doe@example.com
Status: active
Compact input turned readable
Input
{"a":1,"b":2}
Output
{
"a": 1,
"b": 2
}
Input expectations and common surprises
Formatting and minifying tools should not change the logical meaning of the data. If the meaning appears different, it is usually because the original input was already malformed or relied on layout-sensitive syntax.
For deterministic tools, the same input and the same settings should reproduce the same result. If not, the input likely changed in a small but meaningful way.