Can I edit XLSX files?

Yes. Open an XLSX, edit it and save it as XLSX again; saving XLSX, ODS and CSV is always free.

Yes. Every editing feature is free to use, with nothing to install. Saving in the app's own format needs no account; other exports need a free one. A paid plan, from $9 a month, adds PDF export.

Apps

Online Spreadsheet Free: Open and Edit XLSX Files

Free to use, nothing to install. Work with formulas, functions, charts, pivot tables, conditional formatting and multiple sheets. Open and save XLSX, ODS and CSV files.

Open SpreadsheetOpens in your browser. Best on a computer.

Free

Every editing feature, nothing to install
Save GRIDCRAFT, XLSX, XLSM, XLSB, ODS, CSV anytime
Export TSV, TXT, JSON, HTML, PNG, JPG with a free account
Your files stay on your device

With any paid plan

PDF export

Why use Spreadsheet

100% free: Every editing feature is free to use, with nothing to install. Some exports need a free account.
Private by design: The app runs in your browser, and your work stays on your device unless you save it to your account.
Works on any device: Runs in your browser on Windows, Mac, Linux, Android and iPhone. No app needed.

How to use Spreadsheet

Click Open Spreadsheet.
Open an XLSX or CSV, or start a new workbook.
Edit and save.

Frequently asked questions

Can I edit XLSX files?: Yes. Open an XLSX, edit it and save it as XLSX again; saving XLSX, ODS and CSV is always free.
Are my spreadsheets uploaded?: No. They stay on your device.
What does Pro add?: PDF export.
Is Spreadsheet free?: Yes. Every editing feature is free to use, with nothing to install. Saving in the app's own format needs no account; other exports need a free one. A paid plan, from $9 a month, adds PDF export.