Excel Tools
XLSX Editor
Open, edit, and save spreadsheet files entirely in your browser.
How it works
Your file stays on your device. Nothing is uploaded.
- Open XLSX, XLS, ODS, or CSV files
- Click any cell to edit — add or delete rows
- Save the edited file as XLSX
Drop a spreadsheet here or click to browse
How to edit a spreadsheet
- Click "Open spreadsheet" or drag a file into the drop zone.
- Click any cell to edit its contents. Use "+ Add row" to insert rows.
- Click "Save XLSX" to download the edited file.
Frequently asked questions
Is my file uploaded to a server?
No. Everything runs in your browser using SheetJS. Your data never leaves your device.
What formats are supported?
XLSX, XLS, ODS, and CSV files. The output is always XLSX.