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…
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 OFX (Open Financial Exchange) file format is a standardized specification for the electronic exchange of financial data between fi…
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…
Outline Processor Markup Language (OPML) is an XML-based file format designed for the exchange of outline-structured information betwe…
ORC (Optimized Row Columnar) is a self-describing, type-aware columnar file format designed for Hadoop workloads. It is optimized for…
The OSGB file format is a binary representation of a 3D scene graph used primarily by the OpenSceneGraph (OSG) library, which is an op…
The OSGT file format is a text-based representation of a 3D scene graph used by the OpenSceneGraph (OSG) library. OpenSceneGraph is an…
The OSM file format is a data format used by OpenStreetMap (OSM), a collaborative project to create a free editable map of the world…
An .osu file is a plain text document used by the rhythm game 'osu!' to define the structure and gameplay elements of a specific song…
The OTF (OpenType Font) file format is a widely used standard for digital fonts, developed jointly by Microsoft and Adobe. It's an ext…
Open Timeline I/O (OTIO) is an open-source ecosystem designed to facilitate the interchange of editorial timeline information between…
The OTP file extension stands for OpenDocument Presentation Template. It is an XML-based file format used for creating presentation te…
An OTS file is a spreadsheet template created using the OpenDocument standard, which is an open, XML-based file format for office appl…
An Open Virtual Appliance (OVA) file is a package that contains files used to describe a virtual machine. It is based on the Open Virt…
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…
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 OFX (Open Financial Exchange) file format is a standardized specification for the electronic exchange of financial data between financial institutions, bus…
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…
Outline Processor Markup Language (OPML) is an XML-based file format designed for the exchange of outline-structured information between applications. Original…
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 OSGB file format is a binary representation of a 3D scene graph used primarily by the OpenSceneGraph (OSG) library, which is an open-source, high-performan…
The OSGT file format is a text-based representation of a 3D scene graph used by the OpenSceneGraph (OSG) library. OpenSceneGraph is an open-source, high-perfor…
The OSM file format is a data format used by OpenStreetMap (OSM), a collaborative project to create a free editable map of the world. OSM files store geographi…
An .osu file is a plain text document used by the rhythm game 'osu!' to define the structure and gameplay elements of a specific song, known as a beatmap. Thes…
The OTF (OpenType Font) file format is a widely used standard for digital fonts, developed jointly by Microsoft and Adobe. It's an extension of the TrueType fo…
Open Timeline I/O (OTIO) is an open-source ecosystem designed to facilitate the interchange of editorial timeline information between different software applic…
The OTP file extension stands for OpenDocument Presentation Template. It is an XML-based file format used for creating presentation templates that serve as a b…
An OTS file is a spreadsheet template created using the OpenDocument standard, which is an open, XML-based file format for office applications. This specific e…
An Open Virtual Appliance (OVA) file is a package that contains files used to describe a virtual machine. It is based on the Open Virtualization Format (OVF) s…
Everything you need to know about file extensions