The File Extensions Database

.NUMBERS-TEF File Extension

  • Developer by: Apple
  • Category: Spreadsheet Files
  • Format: Binary

What is an .NUMBERS-TEF file?

.NUMBERS-TEF is Numbers iCloud Document

Spreadsheet file created by Numbers, Apple's spreadsheet program included in the iWork suite; used as the save format when the user chooses to save the spreadsheet to iCloud.

Even though iCloud uses the NUMBERS-TEF extension, it shouldn't be an issue for users. When you open a spreadsheet on your Mac OS X or iOS version of Numbers, the spreadsheet will still load properly.

NOTE: Numbers spreadsheets saved on the local computer use the .NUMBERS extension.

Programs that open Numbers iCloud Document
Apple Numbers
Apple Numbers

How to solve problems with NUMBERS-TEF files

  • Associate the NUMBERS-TEF file extension with the correct application. On :
    Windows: Right click on any NUMBERS-TEF file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.NUMBERS-TEF files". Mac: Right click (or Ctrl-click) the NUMBERS-TEF file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .NUMBERS-TEF is Numbers iCloud Document. Because only the current version supports the latest NUMBERS-TEF file format. Search, therefore, e.g. on the Apple manufacturer website after an available .NUMBERS-TEF is Numbers iCloud Document update.
  • To make sure that your NUMBERS-TEF file is not corrupted or virus-infected, get the file again and scan it with antivirus software.