File Extension OTF

  • Full name
    OpenType Font File Format
  • Developer
  • Popularity
Have you encountered a problem with a OTF file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a OTF file here. In the further part of this page we have added a list of programs that should open your OTF file. It is enough you choose a proper application for your operating system, download and install it.


The file extension OTF features an OpenType font, a font standard for computers that was originally developed by Microsoft and later developed jointly with Adobe. Released in 1996, there were already a large number of OpenType fonts by the year 2000.

Fonts are in short all alphanumeric characters, special characters and partly international characters represented in a specific style and cut. Well-known fonts are for example Arial, Helvetica or Times New Roman.

An OTF file contains data in a tabular format, which includes either a TrueType or a Postscript Outline Font (in the so-called CFF format). OpenType fonts can have the endings orf and the file ends ttf, depending on their content. Often, the suffix ttf is used to maintain compatibility on systems that do not natively support OTF.

While font files that only contain Postscript fonts usually have the ending otf, font files with TrueType data can have both endings.

OTF fonts can be easily viewed and installed in Windows by double-clicking or using the shortcut menu, they are then automatically copied to the fonts folder and are immediately available. On the Mac (as of OSX) there are several fonts folders that can contain fonts. (eg System / Library, Library) To install, just copy the OTF file into one of the fonts folders or use the font collection.

Although OpenType is a registered trademark of Microsoft, the technology is available to all and may be used on any operating system. In addition to Windows, Mac OSX and Linux also support the OTF standard through the open source project Freetype. Since Font Rendering is an operating system function, all programs that fall back on it can automatically use OpenType fonts, but some programs can not access all special characters.

Programs which can open a OTF file

How to open a OTF file? Advice and guidance

Absolutely most often appearing reason that prevents you from opening the OTF file is the lack of a proper application to support it in your operating system. It is notably the first thing you need to address. When one of the programs to support a OTF file from the list is already installed, you can try to rerun the file. The system should display a message asking you to choose a primary application to support OTF files. At this point we are looking for disk space where the application was installed in and we can link it with a OTF file. Since then, our operating system will use the selected program to support all OTF files.

Other issues

Despite the described problem with OTF there may be many more problems. If the existing operations were not effective, get involved with the following matters:

- verify that the OTF file is not damaged and that it has been downloaded or copied in whole
- verify that the file has a file extension that has not been intentionally changed (for example, if it do not contain other information than its extension suggests)
- make sure again whether the OTF file type is linked in the operating system with a proper program
- make sure that the file is not infected with a virus and you have up to date software and drivers.

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