File Extension OTF

.OTF File

File extension: OTF
File type: OpenDocument (Ver 2) Formula Template


Notes about the OTF file extension:



Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.

The OTF file type is primarily associated with 'OpenOffice/StarOffice' by Sun Microsystems, Inc.. This file format is part of the Open Document Format for Office Applications (OpenDocument) 1.0 specification. This OASIS format is expected to become an industry standard for sharing documents. It is being adopted by the OpenOffice/StarOffice version 2 software suite but may appear in other products as well.

Detailed information for file extension OTF:


Primary association: OpenOffice/StarOffice
Company: Sun Microsystems, Inc.
File classification: XML
Mime type: application/vnd.oasis.opendocument.formula-template, application/x-vnd.oasis.opendocument.formula-template
Related links: OASIS Detailed File Format Information, OpenOffice.org 2.0 Office Suite New Features

Other applications associated with file type OTF:

  • Blu-ray (Text Subtitle Font Information) by Blu-ray Disc AssociationThe .OTF file stores the font information associated with Text subtitle applications. Each font has its own file and their names are of the form #####.OTF (a five-digit number followed by .OTF). This association is classified as Video.
  • OnkoS (Text Data File) by OnkoSVocabulary training - German site
  • Open Type (Font Format)OpenType is the unification of two widely used font formats today, PostScript and TrueType, into a single font format. Developed by Adobe Systems Inc. and Microsoft Corporation, OpenType brings these two technologies together and extends them with new typographic and line layout capabilities. The identifying characters used for this association are - Hex: 4F 54 54 4F 00 , ASCII: OTTO Related links: The OpenType Font File
File Identifier - TrID
'Identifying characters' used on FILExt.com are
provided by Marco Pontello from his TrID database




Important: Invalid file associations could be the result of underlying issues within your Windows PC. It is highly recommended that you scan your PC for invalid registry entries, unused processes and other slowdown issues.

Technical data

To view technical data on file-extension OTF click this link to expand/hide the additional area.

System Info for File Extension .OTF

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly from user systems.

ProgramID: otffile, FileType: OpenType Font file, AppName: Windows Font Viewer
EXEFile: fontview.exe

ProgramID: otffile
EXEFile: %SystemRoot%\System32\fontview.exe %1

ProgramID: OTF_Document
EXEFile: %ProgramFiles%\IXOS\IXOS-eCONtext\bin\alviewer.exe

ProgramID: otffile
EXEFile: %SystemRoot%\SysWow64\fontview.exe


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