How to use the Excel Viewer Online
- 1. Open the fileChoose or drop a spreadsheet file from your phone or computer.
- 2. Browse the sheetsSwitch between sheets with the tabs and page through the rows.
- 3. Search or exportFind rows with a word or number, or download the current sheet as CSV.
When an online viewer helps
You get a spreadsheet on WhatsApp or email but your phone or college computer has no Excel. Upload sites are risky for salary sheets, marks lists or customer data. This viewer reads the file inside your browser with the open-source SheetJS library, so the contents never travel to a server.
Cells are shown the way Excel formats them: dates as dates, percentages with a % sign and formulas as their last saved result. Column letters (A, B, C…) and row numbers match Excel, so you can tell someone "look at D14" and mean the same cell.
Worked example and limits
Open a workbook with three sheets named Jan, Feb and Mar. The info line shows, for example, "sales.xlsx · sheet Jan: 120 rows × 6 columns". Click the Feb tab to switch. Type a customer name in Search and only matching rows stay, with a count of matches. Press Download this sheet as CSV and you get sales-Feb.csv, ready for the CSV editor, SQL import or Python.
Things the viewer does not show:
- Charts, images, comments and cell colours.
- Macros in .xlsm files, which are never run, for your safety.
- Live recalculation: formulas show their saved values, not freshly calculated ones.
- Password-protected files, which cannot be opened.
Rows are shown 100 per page. Files up to 30 MB work on most devices; very large files may be slow on older phones.
Frequently asked questions
Is my Excel file uploaded?
No. It is opened in your browser's memory. The SheetJS library itself loads from the cdnjs public CDN.
Can I edit the cells?
This page is for viewing. Export the sheet as CSV and open it in the CSV editor to make changes.
Why do some dates look like numbers?
If a date was typed as text or the cell has no date format, Excel stores it as a number. Format the cells as dates in the original file.
Is the viewer free?
Yes, free. After you choose a file, we ask for your name and WhatsApp number once to show it, and you will not be asked again on any Uncodemy tool.