A daily updated filename extension database!

OO3 file extension

The table below provides useful information about the .oo3 file extension. It answers questions such as:

  • What is the .oo3 file?
  • What program do I need to open a .oo3 file?
  • How can the .oo3 file be opened, edited or printed?
  • How can I convert .oo3 files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ OmniOutliner 3 Document

.oo3
Description:
OO3 file is a OmniOutliner 3 Document. OmniOutliner is commercial outlining software for Mac OS X produced by The Omni Group.
OO3 format description not yet available
Category: Document files
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
OO3 aliases:
-
OO3 related links:
OO3 related extensions:
OmniOutliner 3 Document Template

Other types of files may also use the .oo3 file extension.

🚫 The .oo3 file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

lo3, oo, po3

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

FreePascal Object
Pervasive DataExchange Log
STABCAL Data

🔴 Can't open a .oo3 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:

example.oo3

To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .oo3 file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .oo3 file extension, write to us!

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