ZZTool
What is an online Excel viewer?
This online Excel viewer and editor lets you open .xlsx, .xls, .csv and .ods files directly in your browser without installing Office or any other software. You can view every worksheet, edit cell values, insert or delete rows and columns, undo your changes, and then export the result back to Excel (.xlsx) or CSV. All parsing and editing happens locally on your device, so your data never leaves your computer.
Features
Supports .xlsx, .xls, .csv, .tsv and .ods files
Click any cell to change its value, with undo and redo
Insert or delete rows and columns anywhere in the sheet
Download the edited workbook as .xlsx or a single sheet as .csv
Tips
- ✓ Everything runs in your browser — no file is uploaded to a server.
- ✓ Click a cell and start typing; press Tab to move right or Enter to move down.
- ✓ Use the row and column buttons to add or remove data before exporting.
- ✓ You can paste tab-separated data copied from another spreadsheet straight into the grid.
FAQ
Is this Excel viewer free?
Yes, it is completely free and requires no registration or installation.
Are my files uploaded to a server?
No. Your spreadsheet is parsed and edited entirely in your browser, so the data never leaves your device.
Can I save my edits back to Excel?
Yes. After editing, click "Export Excel" to download an .xlsx file that opens in Microsoft Excel, Google Sheets, WPS Office and LibreOffice Calc.
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