Yang Spreadsheet

Open, edit and save .xlsx, .xlsm and .csv files. Formulas recalculate as you type, formatting survives the round trip, and nothing is ever uploaded — the file stays on this device.

…or drop a file anywhere on this page.

What it will not carry through: VBA macros, charts, pivot tables, conditional formatting, data validation, images and comments. Keep your original file and save a copy from here.