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 cache file is a generic data container used by a wide variety of software applications to store temporary information intended to sp…
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…
The CCQ file extension is primarily associated with questionnaire and survey data files generated by specialized evaluation, assessmen…
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…
COLLADA (COLLAborative Design Activity) is an open standard XML schema for exchanging digital assets among various graphics software a…
A 'config' file is a generic file extension used to store configuration settings for various software applications. These files typica…
The CRAM file format is a highly efficient, compressed data format used primarily in the field of bioinformatics and genomics for stor…
A .crash file is a crash report generated by macOS and iOS operating systems when an application unexpectedly terminates or encounters…
A .crdownload file is a temporary file extension used by the Google Chrome web browser (and Chromium-based browsers like Microsoft Edg…
A .crt file is a security certificate file used primarily by web browsers and web servers to verify the identity of a website and esta…
A CSV (Comma Separated Values) file is a plain text file that stores tabular data (numbers and text) in a simple, structured format. E…
The CUP file extension is primarily associated with SeeYou, a comprehensive flight planning and analysis software suite developed by N…
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 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…
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…
The CCQ file extension is primarily associated with questionnaire and survey data files generated by specialized evaluation, assessment, and analytical softwar…
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…
COLLADA (COLLAborative Design Activity) is an open standard XML schema for exchanging digital assets among various graphics software applications. It is primar…
A 'config' file is a generic file extension used to store configuration settings for various software applications. These files typically contain parameters, s…
The CRAM file format is a highly efficient, compressed data format used primarily in the field of bioinformatics and genomics for storing biological sequences…
A .crash file is a crash report generated by macOS and iOS operating systems when an application unexpectedly terminates or encounters a fatal error. These fil…
A .crdownload file is a temporary file extension used by the Google Chrome web browser (and Chromium-based browsers like Microsoft Edge, Brave, and Opera) to i…
A .crt file is a security certificate file used primarily by web browsers and web servers to verify the identity of a website and establish a secure, encrypted…
A CSV (Comma Separated Values) file is a plain text file that stores tabular data (numbers and text) in a simple, structured format. Each line of the file repr…
The CUP file extension is primarily associated with SeeYou, a comprehensive flight planning and analysis software suite developed by Naviter, which is widely u…
Everything you need to know about file extensions