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
The Ogg file format is a free, open container format maintained by the Xiph.Org Foundation. It is designed for streaming and manipulat…
A DLL (Dynamic Link Library) file is a library that contains code and data that can be used by more than one program at the same time…
MP3 (MPEG Audio Layer III) is a widely used audio coding format for digital audio. It's known for its ability to significantly reduce…
An IMG file is a disk image, a single file containing the complete structure and contents of a data storage medium, such as a hard dri…
APNG (Animated Portable Network Graphics) is a file format that extends the PNG (Portable Network Graphics) specification to allow for…
An ISO file, often referred to as an ISO image, is an archive file that contains an identical copy (or image) of the data found on an…
The .sat file extension is associated with ACIS, a geometric modeling kernel developed by Spatial Corporation (now part of Dassault Sy…
The FBX file format, short for Filmbox, is a proprietary file format developed by Autodesk. It's primarily used for exchanging 3D data…
Rich Text Format (RTF) is a proprietary document file format developed by Microsoft in 1987 for cross-platform document interchange. I…
The .ts file extension represents a Transport Stream file, a video stream format primarily used for storing and transmitting video, au…
A dylib file is a dynamically linked library used on macOS operating systems. It's analogous to DLL files on Windows and SO files on L…
FLAC (Free Lossless Audio Codec) is an audio coding format for lossless compression of digital audio. Unlike lossy audio formats such…
The .apks file extension represents an Android Package Set Archive. This archive format is used to bundle multiple APK (Android Packag…
A .BTM file is a batch file used by Take Command Console (TCC), a command-line interpreter for Windows. TCC is a replacement for the s…
JPEG (Joint Photographic Experts Group) is a widely used method of lossy compression for digital images, particularly for those produc…
The IFC (Industry Foundation Classes) file format is an open, international standard for Building Information Modeling (BIM) data. It…
A DMG file is an Apple Disk Image file, a common format used on macOS to distribute software. It's essentially a digital container tha…
A ZIP file is a compressed archive format that can contain one or more files and folders. In this specific context, the ZIP file conta…
ASP.NET files, typically using the `.aspx` extension (the extension value we'll focus on), are web pages generated using Microsoft's A…
A .mdmp file, short for Minidump file, is a crash dump file format used by the Windows operating system and other applications. It con…
YAML (YAML Ain't Markup Language) is a human-readable data serialization standard that is often used for configuration files and in ap…
An EXE file is a common file extension for executable files in Windows operating systems. It contains program code that can be directl…
A .ps1 file is a text file containing commands written in the PowerShell scripting language. PowerShell is a task automation and confi…
A .bak file is a backup file, a common extension used to denote a copy of data created for recovery purposes in case the original data…
The Ogg file format is a free, open container format maintained by the Xiph.Org Foundation. It is designed for streaming and manipulation of high-quality digit…
A DLL (Dynamic Link Library) file is a library that contains code and data that can be used by more than one program at the same time. DLLs are a crucial part…
MP3 (MPEG Audio Layer III) is a widely used audio coding format for digital audio. It's known for its ability to significantly reduce file size while maintaini…
An IMG file is a disk image, a single file containing the complete structure and contents of a data storage medium, such as a hard drive, floppy disk, CD-ROM…
APNG (Animated Portable Network Graphics) is a file format that extends the PNG (Portable Network Graphics) specification to allow for animated images. It's es…
An ISO file, often referred to as an ISO image, is an archive file that contains an identical copy (or image) of the data found on an optical disc, like a CD…
The .sat file extension is associated with ACIS, a geometric modeling kernel developed by Spatial Corporation (now part of Dassault Systèmes). SAT files store…
The FBX file format, short for Filmbox, is a proprietary file format developed by Autodesk. It's primarily used for exchanging 3D data between different 3D app…
Rich Text Format (RTF) is a proprietary document file format developed by Microsoft in 1987 for cross-platform document interchange. It\'s designed to be a rel…
The .ts file extension represents a Transport Stream file, a video stream format primarily used for storing and transmitting video, audio, and metadata over di…
A dylib file is a dynamically linked library used on macOS operating systems. It's analogous to DLL files on Windows and SO files on Linux. Dylibs contain code…
FLAC (Free Lossless Audio Codec) is an audio coding format for lossless compression of digital audio. Unlike lossy audio formats such as MP3, AAC, and Vorbis…
The .apks file extension represents an Android Package Set Archive. This archive format is used to bundle multiple APK (Android Package Kit) files together. Th…
A .BTM file is a batch file used by Take Command Console (TCC), a command-line interpreter for Windows. TCC is a replacement for the standard CMD.EXE command p…
JPEG (Joint Photographic Experts Group) is a widely used method of lossy compression for digital images, particularly for those produced by digital photography…
The IFC (Industry Foundation Classes) file format is an open, international standard for Building Information Modeling (BIM) data. It is developed by buildingS…
A DMG file is an Apple Disk Image file, a common format used on macOS to distribute software. It's essentially a digital container that holds compressed softwa…
A ZIP file is a compressed archive format that can contain one or more files and folders. In this specific context, the ZIP file contains SFC (Super Famicom) o…
ASP.NET files, typically using the `.aspx` extension (the extension value we'll focus on), are web pages generated using Microsoft's ASP.NET framework. These f…
A .mdmp file, short for Minidump file, is a crash dump file format used by the Windows operating system and other applications. It contains a snapshot of the p…
YAML (YAML Ain't Markup Language) is a human-readable data serialization standard that is often used for configuration files and in applications where data is…
An EXE file is a common file extension for executable files in Windows operating systems. It contains program code that can be directly executed by the operati…
A .ps1 file is a text file containing commands written in the PowerShell scripting language. PowerShell is a task automation and configuration management frame…
A .bak file is a backup file, a common extension used to denote a copy of data created for recovery purposes in case the original data is lost or corrupted. Th…
Everything you need to know about file extensions