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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The C3D (Coordinate 3D) file format is a public domain, binary file format used extensively in the fields of biomechanics, motion capt…
A CAB (Cabinet) file is an archive file format used in Microsoft Windows. It is a single file that can contain multiple compressed fil…
A cache file is a generic data container used by a wide variety of software applications to store temporary information intended to sp…
The Core Audio Format (CAF) is a highly flexible and advanced digital audio container format developed by Apple Inc. It was specifical…
A .CATPart file is a 3D CAD (Computer-Aided Design) part file created by CATIA (Computer-Aided Three Dimensional Interactive Applicati…
The CATPART file format is a proprietary 3D CAD (Computer-Aided Design) file format developed by Dassault Systèmes for use with their…
A CBP file is a project file created by Code::Blocks, which is a free, open-source, and cross-platform Integrated Development Environm…
A CBR file is a Comic Book Archive file. It's essentially a renamed RAR archive containing a series of image files, typically in JPEG…
A CBZ file is a comic book archive format. It is essentially a ZIP archive containing a series of image files, typically in JPEG, PNG…
The CCQ file extension is primarily associated with questionnaire and survey data files generated by specialized evaluation, assessmen…
The CDG file extension stands for Compact Disc plus Graphics and is a legacy format primarily used for karaoke. This format is an exte…
The CDR file extension is associated with CorelDRAW, a vector graphics editor developed by Corel Corporation. CDR files are proprietar…
A CFG file is a configuration file used by various software programs to store settings and parameters. These files are typically plain…
The CGT file extension is primarily associated with VERICUT, a sophisticated software suite developed by CGTech used for CNC simulatio…
The `.cjs` file extension is used for JavaScript files that contain code written using the CommonJS module system. CommonJS is a modul…
A .clang-format file is a configuration file used by ClangFormat, a highly popular tool developed under the LLVM project designed to a…
CMake is an open-source, cross-platform family of tools designed to build, test, and package software. The .cmake file extension is pr…
A .CMD file is a command script file used primarily by the Windows NT family of operating systems (Windows NT, 2000, XP, Vista, 7, 8…
The Common Object File Format (COFF) is a file format used for object code, executables, and shared libraries in various operating sys…
COLLADA (COLLAborative Design Activity) is an open standard XML schema for exchanging digital assets among various graphics software a…
A .COM file is an executable file format used primarily in DOS and early Windows operating systems. It's one of the simplest executabl…
A 'config' file is a generic file extension used to store configuration settings for various software applications. These files typica…
A .cpp file is a source code file written in the C++ programming language, which is a high-level, general-purpose language that evolve…
A CPR file is a project file created by Steinberg Cubase, a professional Digital Audio Workstation (DAW) used for music production, re…
The C3D (Coordinate 3D) file format is a public domain, binary file format used extensively in the fields of biomechanics, motion capture, and gait analysis. O…
A CAB (Cabinet) file is an archive file format used in Microsoft Windows. It is a single file that can contain multiple compressed files, often used for softwa…
A cache file is a generic data container used by a wide variety of software applications to store temporary information intended to speed up future requests fo…
The Core Audio Format (CAF) is a highly flexible and advanced digital audio container format developed by Apple Inc. It was specifically designed to overcome t…
A .CATPart file is a 3D CAD (Computer-Aided Design) part file created by CATIA (Computer-Aided Three Dimensional Interactive Application), a multi-platform sof…
The CATPART file format is a proprietary 3D CAD (Computer-Aided Design) file format developed by Dassault Systèmes for use with their CATIA software suite. It…
A CBP file is a project file created by Code::Blocks, which is a free, open-source, and cross-platform Integrated Development Environment (IDE) designed for C…
A CBR file is a Comic Book Archive file. It's essentially a renamed RAR archive containing a series of image files, typically in JPEG, PNG, or GIF format, whic…
A CBZ file is a comic book archive format. It is essentially a ZIP archive containing a series of image files, typically in JPEG, PNG, or GIF format, represent…
The CCQ file extension is primarily associated with questionnaire and survey data files generated by specialized evaluation, assessment, and analytical softwar…
The CDG file extension stands for Compact Disc plus Graphics and is a legacy format primarily used for karaoke. This format is an extension of the standard Red…
The CDR file extension is associated with CorelDRAW, a vector graphics editor developed by Corel Corporation. CDR files are proprietary vector image files that…
A CFG file is a configuration file used by various software programs to store settings and parameters. These files are typically plain text or binary files tha…
The CGT file extension is primarily associated with VERICUT, a sophisticated software suite developed by CGTech used for CNC simulation, verification, and opti…
The `.cjs` file extension is used for JavaScript files that contain code written using the CommonJS module system. CommonJS is a module format designed primari…
A .clang-format file is a configuration file used by ClangFormat, a highly popular tool developed under the LLVM project designed to automatically format sourc…
CMake is an open-source, cross-platform family of tools designed to build, test, and package software. The .cmake file extension is primarily used for CMake sc…
A .CMD file is a command script file used primarily by the Windows NT family of operating systems (Windows NT, 2000, XP, Vista, 7, 8, 10, and 11). It is simila…
The Common Object File Format (COFF) is a file format used for object code, executables, and shared libraries in various operating systems, particularly Unix-l…
COLLADA (COLLAborative Design Activity) is an open standard XML schema for exchanging digital assets among various graphics software applications. It is primar…
A .COM file is an executable file format used primarily in DOS and early Windows operating systems. It's one of the simplest executable formats, typically limi…
A 'config' file is a generic file extension used to store configuration settings for various software applications. These files typically contain parameters, s…
A .cpp file is a source code file written in the C++ programming language, which is a high-level, general-purpose language that evolved from the original C lan…
A CPR file is a project file created by Steinberg Cubase, a professional Digital Audio Workstation (DAW) used for music production, recording, arranging, and e…
Everything you need to know about file extensions