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.
Refine your search with categories and letters
Big5 is a character encoding standard used for Traditional Chinese characters, predominantly in Taiwan, Hong Kong, and Macau. Develope…
The FOF file extension, standing for 'File of Files' or 'Folders of Files,' is primarily used as a manifest or index file in specializ…
An Adobe Native Extension (ANE) is a specialized file format used by developers working with the Adobe AIR (Adobe Integrated Runtime)…
A POM (Project Object Model) file is an XML-based configuration file used primarily by Apache Maven, a popular build automation and pr…
The VMSD file is a metadata file used by VMware virtualization software, specifically associated with VMware Workstation, VMware Playe…
The GCD file format is primarily associated with Generic CADD, a popular computer-aided design (CAD) software package that was widely…
A file with the MTW extension is a Minitab Worksheet used by Minitab, a popular statistical analysis software package. It stores data…
The VOX file format is a specialized audio file format primarily used for storing digitized voice recordings. It was developed by Dial…
The /etc/passwd file is a fundamental configuration file in Unix-like operating systems, including Linux and macOS. It is a plain-text…
The DS2 file format, also known as Digital Speech Standard Pro, is a proprietary audio compression format developed primarily by Olymp…
The WPT file extension is primarily associated with template files used by word processing applications, most notably Corel WordPerfec…
The IMY file extension is primarily associated with the iMelody format, a monophonic ringtone format originally developed by Ericsson…
A 'fumen' file is a binary data format primarily used by the 'Taiko no Tatsujin' (Drum Master) series of rhythm games developed by Ban…
SCons is an open-source software construction tool—that is, a next-generation build tool designed to automate the building of software…
A .kts file is a Kotlin Script file, which is a variation of the Kotlin programming language specifically designed to be executed as a…
The Broadcast Wave Format (BWF) is a standard audio file format that serves as an extension of the ubiquitous Microsoft WAVE format. D…
MIDI (Musical Instrument Digital Interface) is a technical standard that describes a communications protocol, digital interface, and e…
The RDF (Resource Description Framework) file extension represents a metadata file format used to store information about resources on…
The CUP file extension is primarily associated with SeeYou, a comprehensive flight planning and analysis software suite developed by N…
The NOS file extension is primarily associated with Nokia Operator Settings. These files were historically used by Nokia mobile device…
The MVNX file format is a proprietary XML-based format developed by Xsens for storing motion capture data. It is primarily used by the…
A GPG file is an encrypted or digitally signed file created using GNU Privacy Guard (GnuPG), which is a free, open-source implementati…
A .bison file is a grammar specification file used by GNU Bison, a general-purpose parser generator that converts an annotated context…
An EditorConfig file is a highly portable configuration file used to define and maintain consistent coding styles between different ed…
Big5 is a character encoding standard used for Traditional Chinese characters, predominantly in Taiwan, Hong Kong, and Macau. Developed in the mid-1980s by a c…
The FOF file extension, standing for 'File of Files' or 'Folders of Files,' is primarily used as a manifest or index file in specialized data processing enviro…
An Adobe Native Extension (ANE) is a specialized file format used by developers working with the Adobe AIR (Adobe Integrated Runtime) platform, now maintained…
A POM (Project Object Model) file is an XML-based configuration file used primarily by Apache Maven, a popular build automation and project management tool for…
The VMSD file is a metadata file used by VMware virtualization software, specifically associated with VMware Workstation, VMware Player, and VMware ESXi. When…
The GCD file format is primarily associated with Generic CADD, a popular computer-aided design (CAD) software package that was widely used in the 1980s and 199…
A file with the MTW extension is a Minitab Worksheet used by Minitab, a popular statistical analysis software package. It stores data in a spreadsheet-like gri…
The VOX file format is a specialized audio file format primarily used for storing digitized voice recordings. It was developed by Dialogic Corporation and is w…
The /etc/passwd file is a fundamental configuration file in Unix-like operating systems, including Linux and macOS. It is a plain-text file that contains essen…
The DS2 file format, also known as Digital Speech Standard Pro, is a proprietary audio compression format developed primarily by Olympus, Philips, and Grundig…
The WPT file extension is primarily associated with template files used by word processing applications, most notably Corel WordPerfect and Kingsoft WPS Office…
The IMY file extension is primarily associated with the iMelody format, a monophonic ringtone format originally developed by Ericsson for use in early mobile p…
A 'fumen' file is a binary data format primarily used by the 'Taiko no Tatsujin' (Drum Master) series of rhythm games developed by Bandai Namco. The term 'fume…
SCons is an open-source software construction tool—that is, a next-generation build tool designed to automate the building of software projects. Think of SCons…
A .kts file is a Kotlin Script file, which is a variation of the Kotlin programming language specifically designed to be executed as a script rather than being…
The Broadcast Wave Format (BWF) is a standard audio file format that serves as an extension of the ubiquitous Microsoft WAVE format. Developed by the European…
MIDI (Musical Instrument Digital Interface) is a technical standard that describes a communications protocol, digital interface, and electrical connectors that…
The RDF (Resource Description Framework) file extension represents a metadata file format used to store information about resources on the web. Developed by th…
The CUP file extension is primarily associated with SeeYou, a comprehensive flight planning and analysis software suite developed by Naviter, which is widely u…
The NOS file extension is primarily associated with Nokia Operator Settings. These files were historically used by Nokia mobile devices to store and transmit c…
The MVNX file format is a proprietary XML-based format developed by Xsens for storing motion capture data. It is primarily used by the Xsens MVN Animate and MV…
A GPG file is an encrypted or digitally signed file created using GNU Privacy Guard (GnuPG), which is a free, open-source implementation of the OpenPGP standar…
A .bison file is a grammar specification file used by GNU Bison, a general-purpose parser generator that converts an annotated context-free grammar into a dete…
An EditorConfig file is a highly portable configuration file used to define and maintain consistent coding styles between different editors and IDEs working on…
Everything you need to know about file extensions