Browse file extensions by category or letter. Learn what each file type is used for and find software that can open, view, edit, or convert it.
Use this directory to look up file formats, understand what files are used for, and find compatible applications for Windows, macOS, Linux, mobile, and online tools.
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An OBB file is an expansion file used by the Android operating system to store additional data for applications. Because Android appli…
The Wavefront .OBJ file format is a geometry definition file format first developed by Wavefront Technologies for its Advanced Visuali…
An OLE Control Extension (OCX) file is a type of dynamic-link library (DLL) used in Microsoft Windows operating systems. OCX files con…
An OCX file is a type of file used in older versions of Microsoft Windows. The extension stands for OLE Control Extension. OCX files a…
OCX files are components used by Windows operating systems to provide reusable functionality to different software applications. They…
OCX files are components used in the Microsoft Windows operating system. They are essentially Dynamic Link Libraries (DLLs) that imple…
The ODB file extension represents a database file created using the OpenDocument standard. It is the native file format for Base, the…
The ODP file extension stands for OpenDocument Presentation. It is an XML-based file format used for creating and sharing electronic p…
The ODS file extension represents a spreadsheet document format used by OpenOffice and LibreOffice, both open-source office suites. It…
The ODT file extension represents a text document format used by word processors. It is the main document format for the OpenOffice an…
The OFX (Open Financial Exchange) file format is a standardized specification for the electronic exchange of financial data between fi…
The Ogg file format is a free, open container format maintained by the Xiph.Org Foundation. It is designed for streaming and manipulat…
The file extension 'olecontrolextension1' is not a standard or widely recognized file extension. It likely represents a proprietary or…
The 'olecontrolextension10' file extension is associated with data related to OLE (Object Linking and Embedding) controls, specificall…
The term 'olecontrolextension2' is not a standard or recognized file extension. It's highly likely that this is a placeholder, a tempo…
The 'olecontrolextension6' file extension is not a standard or widely recognized file format. It's highly likely that this extension i…
The file extension 'olecontrolextension7' is not a standard or widely recognized file extension. It likely represents a proprietary or…
The file extension 'olecontrolextension8' is not a standard or widely recognized file extension. It likely represents a proprietary or…
The file extension 'olecontrolextension9' is not a standard or widely recognized file extension. It likely represents a proprietary or…
The Open Media Framework (OMF) is a platform-independent file format designed for the exchange of digital media between different soft…
Outline Processor Markup Language (OPML) is an XML-based file format designed for the exchange of outline-structured information betwe…
Opus is a lossy audio coding format developed by the Internet Engineering Task Force (IETF) and standardized as RFC 6716. It is design…
ORC (Optimized Row Columnar) is a self-describing, type-aware columnar file format designed for Hadoop workloads. It is optimized for…
The ORF file extension represents the raw image format used by Olympus digital cameras. Raw image formats, unlike JPEGs, contain minim…
An OBB file is an expansion file used by the Android operating system to store additional data for applications. Because Android application packages (APKs) ar…
The Wavefront .OBJ file format is a geometry definition file format first developed by Wavefront Technologies for its Advanced Visualizer animation package. It…
An OLE Control Extension (OCX) file is a type of dynamic-link library (DLL) used in Microsoft Windows operating systems. OCX files contain ActiveX controls, wh…
An OCX file is a type of file used in older versions of Microsoft Windows. The extension stands for OLE Control Extension. OCX files are essentially dynamic li…
OCX files are components used by Windows operating systems to provide reusable functionality to different software applications. They are essentially Dynamic L…
OCX files are components used in the Microsoft Windows operating system. They are essentially Dynamic Link Libraries (DLLs) that implement OLE (Object Linking…
The ODB file extension represents a database file created using the OpenDocument standard. It is the native file format for Base, the database management compo…
The ODP file extension stands for OpenDocument Presentation. It is an XML-based file format used for creating and sharing electronic presentations, including s…
The ODS file extension represents a spreadsheet document format used by OpenOffice and LibreOffice, both open-source office suites. It's part of the Open Docum…
The ODT file extension represents a text document format used by word processors. It is the main document format for the OpenOffice and LibreOffice suites, and…
The OFX (Open Financial Exchange) file format is a standardized specification for the electronic exchange of financial data between financial institutions, bus…
The Ogg file format is a free, open container format maintained by the Xiph.Org Foundation. It is designed for streaming and manipulation of high-quality digit…
The file extension 'olecontrolextension1' is not a standard or widely recognized file extension. It likely represents a proprietary or custom file format used…
The 'olecontrolextension10' file extension is associated with data related to OLE (Object Linking and Embedding) controls, specifically version 1.0. OLE is a p…
The term 'olecontrolextension2' is not a standard or recognized file extension. It's highly likely that this is a placeholder, a temporary file name, or a cust…
The 'olecontrolextension6' file extension is not a standard or widely recognized file format. It's highly likely that this extension is either a custom extensi…
The file extension 'olecontrolextension7' is not a standard or widely recognized file extension. It likely represents a proprietary or custom file format used…
The file extension 'olecontrolextension8' is not a standard or widely recognized file extension. It likely represents a proprietary or custom file format used…
The file extension 'olecontrolextension9' is not a standard or widely recognized file extension. It likely represents a proprietary or custom file format used…
The Open Media Framework (OMF) is a platform-independent file format designed for the exchange of digital media between different software applications, primar…
Outline Processor Markup Language (OPML) is an XML-based file format designed for the exchange of outline-structured information between applications. Original…
Opus is a lossy audio coding format developed by the Internet Engineering Task Force (IETF) and standardized as RFC 6716. It is designed for efficient encoding…
ORC (Optimized Row Columnar) is a self-describing, type-aware columnar file format designed for Hadoop workloads. It is optimized for large-scale data processi…
The ORF file extension represents the raw image format used by Olympus digital cameras. Raw image formats, unlike JPEGs, contain minimally processed data direc…
Everything you need to know about file extensions