The XML to be validated may be edited into the input box below directly, or by pasting in the text, or by dragging and dropping a file from your system file manager. See the Validation page for more notes on the use of this tool.
OpenMath, CD, CDGroup and STS files are accepted,
also Strict Content MathML (the subset of MathML aligned with OpenMath).
Alternatively one of the (invalid) examples may be inserted using the buttons below.
Show math: inline or indented
Use the check button to check the XML.