The File Extensions Database


.H261 File Extension

  • Category: Digital video and movie Files

What is an .H261 file?

.H261 is H.261 video format

The h261 file extension is related to the H.261 video format.

H.261 was the original format, used to transmit video over ISDN. H.261 is an early standard for video compression used in telecommunication applications.


How to open:

Use compatible tools to work with *.h261 files.

How to convert:

Compatible tools may be able to export *.h.261 files to other formats.

How to solve problems with H261 files

  • Associate the H261 file extension with the correct application. On :
    Windows: Right click on any H261 file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.H261 files". Mac: Right click (or Ctrl-click) the H261 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 .H261 is H.261 video format. Because only the current version supports the latest H261 file format. Search, therefore, e.g. on the manufacturer website after an available .H261 is H.261 video format update.
  • To make sure that your H261 file is not corrupted or virus-infected, get the file again and scan it with antivirus software.