.OTF File Extension
File Type 1OpenType Font
What is an OTF file?
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.
File Type 2OpenDocument Formula Template
.OTF File Association 2
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.
File Type 3OpenTuft Tufting Design File
.OTF File Association 3
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.