Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .otln

Below, you can find answers to the following questions:

  • What is the .otln file?
  • Which program can create the .otln file?
  • Where can you find a description of the .otln format?
  • What can convert .otln files to a different format?
  • Which MIME-type is associated with the .otln extension?

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

Opal Outline Document .otln file icon

Opal Outline Document

OTLN file is an Opal Outline Document. Opal is a flexible and easy to use outliner tool on Mac OS X.
Detailed description not available
Category: Document files
Application: Opal
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:

Other types of files may also use the .otln file extension. If you have helpful information about .otln extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

NoteTab Outline
OmniPage Training

The .otln filename extension is often given incorrectly!

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

otl (5), otn (1)

Can't open a .otln file?

If you want to open a .otln file on your computer, you just need to have the appropriate program installed. If the .otln association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.otln

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2003/2008/2012, Windows 7, Windows 8, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android

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