How to Open an XLSX File

XLSX is the modern Excel workbook format. You can open it online, in Excel, or in compatible spreadsheet apps.

Use the online tool

The fastest option is available in your browser with no upload to a server.

Open XLSX Online

Steps

Use an online viewer - Upload the XLSX file to a browser-only viewer when you need a quick look.
Check workbook sheets - Use sheet tabs to switch between worksheets and inspect row and column data.
Search the sheet - Search visible cell values when you need to find a record quickly.
Export if needed - Download CSV or use another conversion tool if you need the data in a different format.

Before You Start

XLSX files are ZIP-based Office Open XML workbooks.
Password-to-open encrypted files cannot be viewed without the password.
Large workbooks may take longer to parse in the browser.