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 .appx file extension is used for application packages in the Universal Windows Platform (UWP). It's essentially a ZIP archive that…
The .wmv file extension represents a video file format developed by Microsoft. It is primarily designed for streaming video content ov…
JT (Jupiter Tessellation) is an ISO standard (ISO 14306:2017) file format for lightweight 3D data visualization and product lifecycle…
The VDX file format is an XML-based drawing file format used by older versions of Microsoft Visio (specifically Visio 2002, 2003, and…
ActiveX controls are small programs, also known as add-ons, that are used on the Internet to provide interactive content for web pages…
XML (Extensible Markup Language) is a markup language designed for encoding documents in a format that is both human-readable and mach…
The .3ds file extension is a file format associated with the original Autodesk 3D Studio DOS program (later replaced by 3D Studio Max)…
A .tmp file is a generic temporary file created by various programs and operating systems. These files are used to hold data temporari…
The .ttf file extension represents a TrueType Font file. TrueType is a font standard developed by Apple and Microsoft in the late 1980…
The `.cjs` file extension is used for JavaScript files that contain code written using the CommonJS module system. CommonJS is a modul…
OCX files are components used in the Microsoft Windows operating system. They are essentially Dynamic Link Libraries (DLLs) that imple…
The .bil file extension represents a Band Interleaved by Line raster image file. This format is commonly used in remote sensing and ge…
A PLT file is a vector graphics file format primarily associated with Hewlett-Packard Graphics Language (HPGL). HPGL is a printer cont…
Apache Parquet is a columnar storage format optimized for use with big data processing frameworks. Unlike row-oriented formats, Parque…
The .app extension on macOS signifies an Application Bundle. This isn't a single file, but rather a directory (presented as a single f…
WebM is an open, royalty-free, media file format designed for the web. It is primarily intended to offer a high-quality, open-source a…
The Motorola S-Record file format, often shortened to SREC or S19, is a text-based file format used to represent binary data, primaril…
The .sqlite3 file extension is commonly used for SQLite database files. SQLite is a self-contained, serverless, zero-configuration, tr…
A Flatpak bundle is a self-contained package format used for distributing applications on Linux. It includes the application itself, i…
JPEG (Joint Photographic Experts Group) is a widely used method of lossy compression for digital images, particularly for those produc…
A BREP file, short for Boundary Representation file, is a 3D CAD (Computer-Aided Design) file format that stores the geometric and top…
The VHDX file extension represents a Virtual Hard Disk v2 file format. This format is used by Microsoft's Hyper-V virtualization platf…
An M3U (Moving Picture Experts Group Audio Layer 3 Uniform Resource Locator) file is a plain text file that stores a multimedia playli…
The Mach-O (Mach Object) file format is a file format used by macOS, iOS, watchOS, and tvOS for executables, object code, shared libra…
The .appx file extension is used for application packages in the Universal Windows Platform (UWP). It's essentially a ZIP archive that contains all the files n…
The .wmv file extension represents a video file format developed by Microsoft. It is primarily designed for streaming video content over the internet and for p…
JT (Jupiter Tessellation) is an ISO standard (ISO 14306:2017) file format for lightweight 3D data visualization and product lifecycle management (PLM). It's de…
The VDX file format is an XML-based drawing file format used by older versions of Microsoft Visio (specifically Visio 2002, 2003, and 2007). It stores vector g…
ActiveX controls are small programs, also known as add-ons, that are used on the Internet to provide interactive content for web pages. They are based on Micro…
XML (Extensible Markup Language) is a markup language designed for encoding documents in a format that is both human-readable and machine-readable. It defines…
The .3ds file extension is a file format associated with the original Autodesk 3D Studio DOS program (later replaced by 3D Studio Max). It's a binary file form…
A .tmp file is a generic temporary file created by various programs and operating systems. These files are used to hold data temporarily while a file is being…
The .ttf file extension represents a TrueType Font file. TrueType is a font standard developed by Apple and Microsoft in the late 1980s as a competitor to Adob…
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…
OCX files are components used in the Microsoft Windows operating system. They are essentially Dynamic Link Libraries (DLLs) that implement OLE (Object Linking…
The .bil file extension represents a Band Interleaved by Line raster image file. This format is commonly used in remote sensing and geographic information syst…
A PLT file is a vector graphics file format primarily associated with Hewlett-Packard Graphics Language (HPGL). HPGL is a printer control language used by pen…
Apache Parquet is a columnar storage format optimized for use with big data processing frameworks. Unlike row-oriented formats, Parquet stores data by columns…
The .app extension on macOS signifies an Application Bundle. This isn't a single file, but rather a directory (presented as a single file in the Finder) that c…
WebM is an open, royalty-free, media file format designed for the web. It is primarily intended to offer a high-quality, open-source alternative for use in HTM…
The Motorola S-Record file format, often shortened to SREC or S19, is a text-based file format used to represent binary data, primarily for programming microco…
The .sqlite3 file extension is commonly used for SQLite database files. SQLite is a self-contained, serverless, zero-configuration, transactional SQL database…
A Flatpak bundle is a self-contained package format used for distributing applications on Linux. It includes the application itself, its dependencies, and runt…
JPEG (Joint Photographic Experts Group) is a widely used method of lossy compression for digital images, particularly for those produced by digital photography…
A BREP file, short for Boundary Representation file, is a 3D CAD (Computer-Aided Design) file format that stores the geometric and topological information of a…
The VHDX file extension represents a Virtual Hard Disk v2 file format. This format is used by Microsoft's Hyper-V virtualization platform to store the contents…
An M3U (Moving Picture Experts Group Audio Layer 3 Uniform Resource Locator) file is a plain text file that stores a multimedia playlist. It contains a list of…
The Mach-O (Mach Object) file format is a file format used by macOS, iOS, watchOS, and tvOS for executables, object code, shared libraries, dynamically loaded…
Everything you need to know about file extensions