Open XLSX Files Online Without Excel
Open a XLSX file online without Microsoft Excel - a free XLSX file opener and viewer that runs in your browser. No signup, no install, 100% private - your files never leave your device.
Drop your file here or click to upload
Supports .xlsx · up to 50MB
How to Open XLSX Files Online Without Excel
- Upload your file - Drag and drop your XLSX file or click to browse.
- View your data - Your spreadsheet will be displayed in a familiar grid format.
- Navigate sheets - Use tabs to switch between different sheets.
- Export if needed - Download as CSV or use our conversion tools.
About XLSX Files
XLSX is the modern Excel format introduced in 2007. It uses XML and ZIP compression, resulting in smaller file sizes and better compatibility. Our viewer fully supports all XLSX features including multiple sheets, formulas, and formatting.
Use this free XLSX viewer to open an XLSX file online, view XLSX without Excel, and inspect spreadsheet data in seconds. Because it is a browser-based XLSX file viewer and XLSX opener, your workbook never leaves your device - making it a private way to view XLSX files online on any computer, Chromebook, or phone.
XLSX Viewer vs. Other Ways to Open Spreadsheets
| Option | Install required | Cost | Privacy | Best for |
|---|---|---|---|---|
| ExcelTool.io XLSX Viewer | None - works in your browser | Free | Files stay on your device | A quick, private look at a XLSX file online |
| Microsoft Excel | Desktop install / license | Paid (Microsoft 365) | Local | Full editing and advanced features |
| Google Sheets | Google account | Free | File is uploaded to Google | Collaboration and editing online |
| Download-based viewers | App download / setup | Varies | Local after install | Offline desktop viewing |