Free Online Encrypt XLSX with Password

Protect MS Excel and OpenDocument Spreadsheet by making them password protected.

*By uploading your files or using our service you agree with our Terms of Service and Privacy Policy .

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Aspose.Cells for .NET Aspose.Cells Excel Protect

 

Aspose.Cells
  • Protect XLSX
  • Protect Excel from any device: Windows, Mac, Linux, Android and iOS.
  • Encrypt with password in multiple Excel files
  • Instantly download or send output file as an email
  • The protected excel files require a password to open

XLSX Microsoft Excel Open XML Spreadsheet

XLSX is well-known format for Microsoft Excel documents that was introduced by Microsoft with the release of Microsoft Office 2007. Based on structure organized according to the Open Packaging Conventions as outlined in Part 2 of the OOXML standard ECMA-376, the new format is a zip package that contains a number of XML files. The underlying structure and files can be examined by simply unzipping the .xlsx file.

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How to Protect XLSX files

  • Click inside the file drop area to upload XLSX files or drag & drop XLSX files.
  • Enter new password in Password input field to make your XLSX file password protected.
  • Click on Protect Now button. Download link of password protected XLSX file will be shown.
  • You can also send a link to the XLSX file to your email address.
  • Note that file will be deleted from our servers after 24 hours and download links will stop working after this time period.

Other Supported Protections

You can also protect other Excel file formats. Please see the list below.