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File Extensions

Clear explanations, compatible software, and practical guidance for file extensions.

53
Indexed file extensions
Popular searches:
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53 extensions
Letter: M Clear all
.M3U

UTF-8 M3U Playlist

Audio
.M3U8

HTTP Live Streaming Playlist

Video
.M4A

MPEG-4 Audio

Audio
.M4R

MPEG 4 Ringtone

Audio
.MACH-O

Mach Object File Format

Executable
.MAKO

Mako Template File

Programming
.MCH

Money Manager Ex Database File

Data
.MDB

Microsoft Access Database

Data
.MDF

Media Disc Image File

Data
.MDF/MDS

Media Disc Image File / Media Descriptor File

Data
.MDMP

Minidump File

Data
.MEMDUMP

Memory Dump

Data
.MESON

Meson Build System Configuration File

Programming
.MESSAGEPACK

MessagePack

Data
.MHT

MHTML Web Archive

Data
.MID

Musical Instrument Digital Interface

Audio
.MIDI

Musical Instrument Digital Interface

Audio
.MJS

JavaScript Module

Programming
.MKV

Matroska Video File

Video
.ML4

Minitab Macro File

Programming
.MLI

OCaml Interface File

Programming
.MLL

Autodesk Maya Link Library

Executable
.MLT

Shotcut Project File

Video
.MLY

Menhir Parser Specification File

Programming
.M3U

UTF-8 M3U Playlist

Audio
.M3U8

HTTP Live Streaming Playlist

Video
.M4A

MPEG-4 Audio

Audio
.M4R

MPEG 4 Ringtone

Audio
.MACH-O

Mach Object File Format

Executable
.MAKO

Mako Template File

Programming
.MCH

Money Manager Ex Database File

Data
.MDB

Microsoft Access Database

Data
.MDF

Media Disc Image File

Data
.MDF/MDS

Media Disc Image File / Media Descriptor File

Data
.MDMP

Minidump File

Data
.MEMDUMP

Memory Dump

Data
.MESON

Meson Build System Configuration File

Programming
.MESSAGEPACK

MessagePack

Data
.MHT

MHTML Web Archive

Data
.MID

Musical Instrument Digital Interface

Audio
.MIDI

Musical Instrument Digital Interface

Audio
.MJS

JavaScript Module

Programming
.MKV

Matroska Video File

Video
.ML4

Minitab Macro File

Programming
.MLI

OCaml Interface File

Programming
.MLL

Autodesk Maya Link Library

Executable
.MLT

Shotcut Project File

Video
.MLY

Menhir Parser Specification File

Programming
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Frequently Asked Questions

Everything you need to know about file extensions

You can search by entering a file extension directly in the search bar or browse the directory by category or alphabetical index.

Each listing provides a definition of the file extension, common use cases, compatible software, supported platforms, and related or alternative formats.

The database is updated regularly to reflect new file extensions, changes in software compatibility, and evolving file format standards.