.xlsx / application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Open .xlsx
Files Online
Open Excel spreadsheets online
Open a .xlsx file nowFile Viewer
Excel
100% Private
Works in any browser
What is a .xlsx file?
XLSX is the default format for Microsoft Excel spreadsheets, part of the Office Open XML standard.
How to open a .xlsx file online
1
Go to JustOpenFile.com
2
Drag and drop your .xlsx file onto the page
3
Or click "Open File" and select your file
4
The file opens instantly in your browser — nothing is uploaded
100% Private
Your .xlsx file is processed entirely in your browser. It is never uploaded to any server.
FAQ
Is it free to open .xlsx files online? ▼
Yes, completely free. No account required.
Does my .xlsx file get uploaded? ▼
No. The file is opened locally in your browser using JavaScript.
What browsers are supported? ▼
All modern browsers: Chrome, Firefox, Safari, Edge.