OO3 File Extension

OO3 file icon
OmniOutliner 3 Format
  • Developer
    The Omni Group
  • Popularity
    3 (2 votes)

What is OO3 file?

File OO3 is one from the Data Files category. Its full name is OmniOutliner 3 Format. This file format was created by The Omni Group. If you are viewing this site, you are probably looking for programs that will help you support this particular file extension.

In the following part of the page you will find the list of programs that support file OO3 sorted by operating systems. If our database contains information about the conversion of the file OO3, then you will definitely find them here.

Programs that support OO3 file

We hope we helped you solve the problem with the OO3 file. If you do not know where you can download the application from our list, click on the link (which is the name of the program) - you will find more information there on the location where to download the secure setup version of the required application.

This site should help you to find the answers for the specific ones or similar to those questions:

  • How to open a file with the OO3 extension?
  • How can I convert a OO3 file to a different format ?
  • What is the OO3 file format extension?
  • What programs support the OO3 file?

If after viewing the stuff on this site, you have still not received a satisfactory answer to any of the above questions, this means that the information regarding the OO3 file presented here is not complete. Contact us using the contact form and write what information you have not found here.

What else may cause problems?

There can be more reasons which determine that you are not able to open the OO3 file (apart from the lack of the proper application installed).

First - the OO3 file may be incorrectly associated with the application installed to support it. In this case, you need to change this association by yourself. To do this, right-click on the OO3 file that you want to edit, click "Open with" and then select the program from the list that you have installed. After this operation, the problems with opening the OO3 file should be solved.

Second - the file you want to open can simply be damaged. Then, the best solution is to find a new version of given file, or download it again from the same source as before (maybe for some reason in the previous session the download of the OO3 file has not been completed and it cannot be opened properly).

Do you want to help?

If you have additional information about the OO3 file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on OO3 file.

Top File Extensions
Show more
File Extension of the day
edi icon


Electronic Data Interchange Format

EDI file extension is used by database files conforming to the EDI (Electronic Data Interchange) standard. EDI files store strucutred data in plain...