Excel Spreadsheet Editor
Open a .xlsx, edit cell values, and save — free, with no upload and no Excel required.
Drop a .xlsx file here, or choose a file
Processed on your device — nothing is uploaded.
Do I need Microsoft Excel installed?
No — this opens and saves real .xlsx files without Excel, Google Sheets, or any other software.
Does this support formulas?
No — this is a quick cell-value editor, not a formula engine. A cell that had a formula shows its last calculated value as plain text; editing it replaces the formula with whatever you type.
Is my spreadsheet ever uploaded?
No — opening, editing, and saving all happen on your device. Nothing is sent to a server.
Can I add rows or columns?
Yes — use the "+ Row" and "+ Column" buttons above the sheet.