Which files are supported?

Modern .xlsx workbooks (Office Open XML). Legacy .xls is not supported.

Are formulas evaluated?

Stored cell values are shown; complex formulas, charts and styling aren't rendered.

No, the workbook is parsed entirely in your browser.

Drop an .xlsx file to view its sheets and cell values as tables, entirely in your browser. Nothing is uploaded.

Drop an .xlsx file or click to uploadProcessed in your browser — never uploaded.