Convert Excel to Markdown

When to use this skill

Trigger this skill any time there is a .xlsx file that needs to be understood or processed — for example, a user attaches a spreadsheet and asks questions about it, wants a summary of the data, wants specific rows or values pulled out, or wants multiple workbooks in a folder processed together. Excel's native .xlsx format is a zipped XML bundle that is not reliably readable as plain text, so always convert it to Markdown first using the script in this skill rather than trying to open or parse the file directly.

This skill only supports .xlsx. If asked to convert a legacy .xls file, tell the user it isn't supported and ask them to re-save it as .xlsx (Excel: File > Save As > Excel Workbook (.xlsx)) first.