The File Extensions Database


.OTF File Extension

  • Category: Font Files

What is an .OTF file?

.OTF is OpenType Font

An OTF file is a font file saved in the OpenType format developed by Adobe and Microsoft. It combines aspects of the PostScript and TrueType font formats. OTF fonts are fully scalable, meaning the characters can be resized without losing quality.

The OpenType font format is supported by macOS and Windows 2000 and later. OTF files must be stored in the system Fonts directory in order to be accessible by applications.

Programs that open OpenType Font
Windows
FontForge
Mac
Apple Font Book
FontForge
Linux
FontForge
File Type 2 OpenTuft Tufting Design File
Developer by: NedGraphics Category: Data Files Format: Text

General interface format for creating tuft designs that can be processed by tufting machines; allows designs to be weaved into various textile products; contains information such as thread-up, yarn placement, and yarn tuft lengths.

The OTF file format is specified in a Windows .INI file-like structure.

NOTE: The OTF format is supported by NedGraphics tuft design software, but NedGraphics changed the ".otf" extension to ".otu" since there were conflicts with OpenType font files.

File Type 3 OpenDocument Formula Template
Developer by: Oracle Category: Misc Files Format: Binary

Template for creating formulas used by OpenOffice spreadsheets; allows cells within the spreadsheet to be automatically filled in based on formula calculations; formatted using the OASIS OpenDocument XML standard.

Programs that open OpenDocument Formula Template
Windows
Apache OpenOffice
Mac
Apache OpenOffice
Linux
Apache OpenOffice

How to solve problems with OTF files

  • Associate the OTF file extension with the correct application. On :
    Windows: Right click on any OTF file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.OTF files". Mac: Right click (or Ctrl-click) the OTF file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .OTF is OpenType Font. Because only the current version supports the latest OTF file format. Search, therefore, e.g. on the N/A manufacturer website after an available .OTF is OpenType Font update.
  • To make sure that your OTF file is not corrupted or virus-infected, get the file again and scan it with antivirus software.