>> OTLN file

OTLN file format description

Many people share .otln files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .otln file can be edited, converted or printed with. On this page, we try to provide assistance for handling .otln files.

1 filename extension(s) found in our database.

.otln - Opal Outline Document

The OTLN document files are related to Opal. OTLN file is an Opal Outline Document. Opal is a flexible and easy to use outliner tool on Mac OS X.

Document files
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Opal Outline Document related extensions:
CADViewer Redline Markup
Zenographics ZjStream SuperPrint Zj Stream
Siag Spreadsheet Document
NoteCenter Notes Document
Alphacam Flame Drawing
PowerCADD 6 Drawing

Naturally, other applications may also use the .otln file extension. Even harmful programs can create .otln files. Be especially cautious with .otln files coming from an unknown source!

Can't open a .otln 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 can't open this file:


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 one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .otln file extension is often given incorrectly!

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

oln, otn, otl, tln, otlb

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Microsoft Visual C++ Outline Examples Data
NoteTab Outline
OmniPage Training
HyperLynx LineSim Schematic

Operating systems

DataTypes.net currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

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