Excel Viewer
Open .xlsx files instantly without installing Excel.
Preview any workbook in the browser with a fast virtualised grid: switch sheets, sort columns, search across cells and inspect formulas. Nothing is uploaded, so you can safely open files someone emailed you before deciding what to do with them.
- Rating
- 4.9(5.1K)
- Monthly uses
- 740K
- Price
- Free
or drag it here
.xlsx, .xls, .xlsm, .csv, .ods · processed locally, never uploaded
Files stay on your device
What it does well
- Virtualised grid that stays smooth past 500,000 rows
- Formula bar showing the underlying formula, not just the cached value
- Full-text search across every sheet with match highlighting
How to use Excel Viewer
- 1
Drop the file you want to inspect onto the page.
- 2
Switch between sheets with the tab bar.
- 3
Search, sort or filter to find the rows you care about.
- 4
Export the current view to CSV or XLSX if you need it.
Watch a walkthrough
Common problems and fixes
The grid shows numbers where dates should be.
Turn on “Format dates” in the toolbar — some workbooks store dates without a display format, so the raw serial is all that exists in the file.
The tab freezes on a very large file.
Enable streaming mode before opening, which parses sheet by sheet instead of loading the whole workbook into memory at once.
Frequently asked questions
What people say
Our IT team blocked every other online tool because they upload files. This one does not, so excel viewer finally got approved for use on real data.
Small thing, but the error messages actually tell you what to fix. Excel Viewer flagged a hidden character that had been breaking my lookups for weeks.
Handled a file with well over 200,000 rows without complaining. That is more than I can say for the desktop add-in we pay for.
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