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 M3U (Moving Picture Experts Group Audio Layer 3 Uniform Resource Locator) file is a plain text file that stores a multimedia playli…
M3U8 is a plain text playlist file format used by Apple's HTTP Live Streaming (HLS) protocol. It contains an ordered list of media seg…
M4A (MPEG-4 Audio) is a filename extension used to represent audio files encoded with Advanced Audio Coding (AAC) or Apple Lossless Au…
The M4R file extension is used for iPhone ringtone files. It's essentially an AAC (Advanced Audio Coding) audio file, which is a type…
The Mach-O (Mach Object) file format is a file format used by macOS, iOS, watchOS, and tvOS for executables, object code, shared libra…
A Makefile is a special file used by the 'make' utility to automate the process of compiling and building software projects. It contai…
Mako is a template library written in Python. Mako templates are used to generate text output, typically HTML, XML, or other markup la…
The MCH file extension is primarily associated with Money Manager Ex (MMEX), which is a popular, open-source personal finance manageme…
The MDB file extension is primarily associated with Microsoft Access, a database management system (DBMS) from Microsoft. MDB files st…
An MDF file is a disc image file, often associated with Alcohol 120%, a disc imaging and burning software. It's essentially a complete…
MDF (Media Disc Image File) and MDS (Media Descriptor File) are a pair of file formats used for creating and managing disc images, pri…
A .mdmp file, short for Minidump file, is a crash dump file format used by the Windows operating system and other applications. It con…
A .memdump file is a snapshot of a computer's memory at a specific point in time. It contains the raw data stored in RAM, including pr…
The Meson build system uses files with the .meson extension, most notably the meson.build file, to define the build process for softwa…
MessagePack is a binary serialization format. It is used for efficient data interchange between different programming languages and sy…
MHTML (MIME HTML) is a web page archive format used to combine, in a single document, the HTML code and its associated resources such…
MIDI (Musical Instrument Digital Interface) is a technical standard that describes a communications protocol, digital interface, and e…
MIDI (Musical Instrument Digital Interface) is a technical standard that describes a communications protocol, digital interface, and e…
The `.mjs` file extension is used for ECMAScript JavaScript modules. It signifies that the file should be treated as a module by JavaS…
The MKV file format is a flexible, open standard video file format, a container format that can hold an unlimited number of video, aud…
The ML4 file extension denotes a Minitab Macro File. Minitab is a widely used statistical software package designed for quality improv…
The .mli file extension is used for interface files in the OCaml programming language. OCaml is a functional, imperative, and object-o…
The MLL file extension is primarily associated with Autodesk Maya, a professional 3D computer graphics application used for creating i…
The Shotcut Project file, identified by the .mlt extension, is the native project format used by the Shotcut video editing software. S…
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…
M3U8 is a plain text playlist file format used by Apple's HTTP Live Streaming (HLS) protocol. It contains an ordered list of media segments (typically .ts file…
M4A (MPEG-4 Audio) is a filename extension used to represent audio files encoded with Advanced Audio Coding (AAC) or Apple Lossless Audio Codec (ALAC). AAC is…
The M4R file extension is used for iPhone ringtone files. It's essentially an AAC (Advanced Audio Coding) audio file, which is a type of MPEG-4 audio, but rena…
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…
A Makefile is a special file used by the 'make' utility to automate the process of compiling and building software projects. It contains a set of directives, r…
Mako is a template library written in Python. Mako templates are used to generate text output, typically HTML, XML, or other markup languages, dynamically. The…
The MCH file extension is primarily associated with Money Manager Ex (MMEX), which is a popular, open-source personal finance management software. This file fo…
The MDB file extension is primarily associated with Microsoft Access, a database management system (DBMS) from Microsoft. MDB files store the entire database s…
An MDF file is a disc image file, often associated with Alcohol 120%, a disc imaging and burning software. It's essentially a complete copy of a physical CD, D…
MDF (Media Disc Image File) and MDS (Media Descriptor File) are a pair of file formats used for creating and managing disc images, primarily for optical media…
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…
A .memdump file is a snapshot of a computer's memory at a specific point in time. It contains the raw data stored in RAM, including program code, variables, an…
The Meson build system uses files with the .meson extension, most notably the meson.build file, to define the build process for software projects. Meson is des…
MessagePack is a binary serialization format. It is used for efficient data interchange between different programming languages and systems. Unlike human-reada…
MHTML (MIME HTML) is a web page archive format used to combine, in a single document, the HTML code and its associated resources such as images, audio, video…
MIDI (Musical Instrument Digital Interface) is a technical standard that describes a communications protocol, digital interface, and electrical connectors that…
MIDI (Musical Instrument Digital Interface) is a technical standard that describes a communications protocol, digital interface, and electrical connectors that…
The `.mjs` file extension is used for ECMAScript JavaScript modules. It signifies that the file should be treated as a module by JavaScript runtimes, both in b…
The MKV file format is a flexible, open standard video file format, a container format that can hold an unlimited number of video, audio, picture, or subtitle…
The ML4 file extension denotes a Minitab Macro File. Minitab is a widely used statistical software package designed for quality improvement, education, and res…
The .mli file extension is used for interface files in the OCaml programming language. OCaml is a functional, imperative, and object-oriented language that uti…
The MLL file extension is primarily associated with Autodesk Maya, a professional 3D computer graphics application used for creating interactive 3D application…
The Shotcut Project file, identified by the .mlt extension, is the native project format used by the Shotcut video editing software. Shotcut is a popular open…
Everything you need to know about file extensions