Files with on2 file extension are Flash videos with on2 codec.
Software that open on2 file
ON2 file extension - on2 encoded FLV data
What is on2 file? How to open on2 files?
File type specification:
The on2 file extension is used for a special Flash FLV video codec by on2 technologies. Later acquired by Google.
Most likely some old format without support. No further information could be found.
This on2 file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.
The default software associated to open on2 file:
Microsoft Windows Media Player 
Company or developer:
Microsoft Corporation
Microsoft Windows Media Player is default multimedia player installed in Microsoft Windows. WMP can manage music, videos and pictures in computer, play or view them, sync them with portable devices, or burn them on CD/DVD media. It also supports home media sharing with other computers.
List of recommended software applications associated to the .on2 file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open on2 file, edit on2 file, convert on2 file, view on2 file, play on2 file etc. (if exist software for corresponding action in File-Extensions.org's database).
on2 file player - programs that play on2 file - on2 encoded FLV data
Programs supporting the exension on2 on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Microsoft Windows Media Player for play on2 file action.
