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 ANTLR v4 Grammar file, denoted by the .g4 extension, is a source file used by the ANTLR (Another Tool for Language Recognition) par…
The G64 file extension represents a Commodore 64 GCR (Group Code Recording) disk image. Unlike the more common D64 format, which only…
GB18030 is a Chinese national standard and the official character set for the People's Republic of China. It is a variable-length char…
GB2312, officially known as GB2312-80, is a character set and encoding standard for Simplified Chinese characters, primarily used in t…
GBK (Guobiao Ku) is a character encoding standard for Simplified Chinese characters, designed as an extension of the GB2312-80 standar…
The GCD file format is primarily associated with Generic CADD, a popular computer-aided design (CAD) software package that was widely…
A .gcloudignore file is a configuration file used by the Google Cloud Command Line Interface (gcloud CLI) to specify which local files…
The GDB file extension is most commonly associated with the Esri File Geodatabase, a spatial data storage format developed by Esri for…
GeoJSON is a widely used open standard geospatial data interchange format that represents geographic features with their non-spatial a…
GeoPackage is an open, standards-based, platform-independent, portable, self-describing, and compact format for transferring geospatia…
GeoTIFF is a public domain metadata standard which allows georeferencing information to be embedded within a TIFF (Tagged Image File F…
The GGB file format is the native file format used by GeoGebra, an interactive geometry, algebra, statistics, and calculus application…
A GGT file is a GeoGebra Tool template file created and used by GeoGebra, an interactive mathematics software suite designed for scien…
A GHO file is a disk image file created by Symantec Norton Ghost, a legacy disk cloning and backup utility. It contains an exact, sect…
The Graphics Interchange Format (GIF) is a bitmap image format that was introduced by CompuServe in 1987. It has since become widely u…
The .gig file format, short for GigaSampler Instrument File, is a proprietary audio sample library format originally developed by Neme…
A .gitignore file is a plain text configuration file used by the Git version control system. Its primary purpose is to tell Git which…
glTF (GL Transmission Format) is a royalty-free, open standard for 3D scene and model transmission, developed by the Khronos Group. Th…
The .gliffy file extension is associated with Gliffy diagrams. Gliffy is a web-based diagramming application that allows users to crea…
Geography Markup Language (GML) is an XML grammar defined by the Open Geospatial Consortium (OGC) used to express geographical feature…
The .gnumeric file extension is associated with spreadsheet files created by Gnumeric, a free and open-source spreadsheet program. Gnu…
A GPG file is an encrypted or digitally signed file created using GNU Privacy Guard (GnuPG), which is a free, open-source implementati…
The GeoPackage (GPKG) file format is an open, non-proprietary, standards-based, and platform-independent container designed for geogra…
The GPO file extension is primarily associated with Group Policy Object backups created within the Microsoft Windows environment. Thes…
An ANTLR v4 Grammar file, denoted by the .g4 extension, is a source file used by the ANTLR (Another Tool for Language Recognition) parser generator. ANTLR is a…
The G64 file extension represents a Commodore 64 GCR (Group Code Recording) disk image. Unlike the more common D64 format, which only stores the raw data of th…
GB18030 is a Chinese national standard and the official character set for the People's Republic of China. It is a variable-length character encoding that provi…
GB2312, officially known as GB2312-80, is a character set and encoding standard for Simplified Chinese characters, primarily used in the People's Republic of C…
GBK (Guobiao Ku) is a character encoding standard for Simplified Chinese characters, designed as an extension of the GB2312-80 standard. It was officially rele…
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 .gcloudignore file is a configuration file used by the Google Cloud Command Line Interface (gcloud CLI) to specify which local files and directories should b…
The GDB file extension is most commonly associated with the Esri File Geodatabase, a spatial data storage format developed by Esri for its ArcGIS suite of soft…
GeoJSON is a widely used open standard geospatial data interchange format that represents geographic features with their non-spatial attributes. It's based on…
GeoPackage is an open, standards-based, platform-independent, portable, self-describing, and compact format for transferring geospatial information. It is defi…
GeoTIFF is a public domain metadata standard which allows georeferencing information to be embedded within a TIFF (Tagged Image File Format) file. This means t…
The GGB file format is the native file format used by GeoGebra, an interactive geometry, algebra, statistics, and calculus application intended for learning an…
A GGT file is a GeoGebra Tool template file created and used by GeoGebra, an interactive mathematics software suite designed for science, technology, engineeri…
A GHO file is a disk image file created by Symantec Norton Ghost, a legacy disk cloning and backup utility. It contains an exact, sector-by-sector copy of a ha…
The Graphics Interchange Format (GIF) is a bitmap image format that was introduced by CompuServe in 1987. It has since become widely used on the World Wide Web…
The .gig file format, short for GigaSampler Instrument File, is a proprietary audio sample library format originally developed by Nemesys and later owned by TA…
A .gitignore file is a plain text configuration file used by the Git version control system. Its primary purpose is to tell Git which files, directories, or pa…
glTF (GL Transmission Format) is a royalty-free, open standard for 3D scene and model transmission, developed by the Khronos Group. The 'glb' file extension re…
The .gliffy file extension is associated with Gliffy diagrams. Gliffy is a web-based diagramming application that allows users to create various types of diagr…
Geography Markup Language (GML) is an XML grammar defined by the Open Geospatial Consortium (OGC) used to express geographical features. GML serves as a modeli…
The .gnumeric file extension is associated with spreadsheet files created by Gnumeric, a free and open-source spreadsheet program. Gnumeric is designed to be a…
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…
The GeoPackage (GPKG) file format is an open, non-proprietary, standards-based, and platform-independent container designed for geographic information system (…
The GPO file extension is primarily associated with Group Policy Object backups created within the Microsoft Windows environment. These files are generated by…
Everything you need to know about file extensions