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File Extensions

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.

64
Indexed file extensions

Find the right information for any file extension

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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64 extensions
.OGG

Ogg Vorbis

The Ogg file format is a free, open container format maintained by the Xiph.Org Foundation. It is designed for streaming and manipulat…

Audio
.MP3

MPEG Audio Layer III

MP3 (MPEG Audio Layer III) is a widely used audio coding format for digital audio. It's known for its ability to significantly reduce…

Audio
.FLAC

Free Lossless Audio Codec

FLAC (Free Lossless Audio Codec) is an audio coding format for lossless compression of digital audio. Unlike lossy audio formats such…

Audio
.AAC

Advanced Audio Coding

Advanced Audio Coding (AAC) is a standardized, lossy audio compression and encoding scheme for digital audio. Designed to be the succe…

Audio
.WMA LOSSLESS

Windows Media Audio Lossless

Windows Media Audio Lossless (WMA Lossless) is an audio codec developed by Microsoft. It's designed for lossless audio compression, me…

Audio
.AIFF

Audio Interchange File Format

The Audio Interchange File Format (AIFF) is an audio file format standard used for storing sound data for personal computers and other…

Audio
.M3U

UTF-8 M3U Playlist

An M3U (Moving Picture Experts Group Audio Layer 3 Uniform Resource Locator) file is a plain text file that stores a multimedia playli…

Audio
.M4A

MPEG-4 Audio

M4A (MPEG-4 Audio) is a filename extension used to represent audio files encoded with Advanced Audio Coding (AAC) or Apple Lossless Au…

Audio
.PLS

PLS Playlist File

A PLS (Playlist) file is a plain text file format used to store a list of audio or video files for playback in media players. It's a s…

Audio
.GIG

GigaSampler Instrument File

The .gig file format, short for GigaSampler Instrument File, is a proprietary audio sample library format originally developed by Neme…

Audio
.SMF

Standard MIDI File

A Standard MIDI File (SMF) is a universal file format designed to store MIDI (Musical Instrument Digital Interface) data, which consis…

Audio
.ALAC

Apple Lossless Audio Codec

The ALAC (Apple Lossless Audio Codec) file format is a lossless audio compression format developed by Apple Inc. It's designed to redu…

Audio
.OPUS

Opus Audio File

Opus is a lossy audio coding format developed by the Internet Engineering Task Force (IETF) and standardized as RFC 6716. It is design…

Audio
.APE

Monkey's Audio

Monkey's Audio (APE) is a lossless audio compression format. This means that, unlike lossy formats like MP3 or AAC, no audio data is d…

Audio
.WAV

Waveform Audio File Format

The Waveform Audio File Format (WAV, or less commonly WAVE due to MS-DOS 8.3 file name limits) is a widely used audio file format stan…

Audio
.WPL

Windows Media Player Playlist

A WPL file is a playlist format used by Windows Media Player. It's essentially an XML-based file that contains a list of media files (…

Audio
.PKF

Adobe Audition Peak File

Adobe Audition Peak files (.pkf) are auxiliary files created by Adobe Audition, a professional audio editing and digital audio worksta…

Audio
.WMA

Windows Media Audio

Windows Media Audio (WMA) is a proprietary audio codec developed by Microsoft. It is used for storing and playing audio files, often w…

Audio
.M4R

MPEG 4 Ringtone

The M4R file extension is used for iPhone ringtone files. It's essentially an AAC (Advanced Audio Coding) audio file, which is a type…

Audio
.TTS

Text-to-Speech Voice File

The .tts file extension is commonly associated with text-to-speech (TTS) voice files. These files typically contain pre-recorded audio…

Audio
.SF2

SoundFont 2

SoundFont 2 (SF2) is a widely recognized file format for storing musical instrument samples and synthesis parameters. Developed by E-m…

Audio
.CPR

Cubase Project File

A CPR file is a project file created by Steinberg Cubase, a professional Digital Audio Workstation (DAW) used for music production, re…

Audio
.RPP

REAPER Project File

The RPP file extension is primarily associated with REAPER (Rapid Environment for Audio Production, Engineering, and Recording), a com…

Audio
.KAR

MIDI Karaoke File

The .kar file extension represents the MIDI Karaoke file format, which is a specialized variation of the Standard MIDI File (SMF). Unl…

Audio
.OGG

Ogg Vorbis

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…

Audio
.MP3

MPEG Audio Layer III

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…

Audio
.FLAC

Free Lossless Audio Codec

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…

Audio
.AAC

Advanced Audio Coding

Advanced Audio Coding (AAC) is a standardized, lossy audio compression and encoding scheme for digital audio. Designed to be the successor to MP3, AAC generall…

Audio
.WMA LOSSLESS

Windows Media Audio Lossless

Windows Media Audio Lossless (WMA Lossless) is an audio codec developed by Microsoft. It's designed for lossless audio compression, meaning it compresses audio…

Audio
.AIFF

Audio Interchange File Format

The Audio Interchange File Format (AIFF) is an audio file format standard used for storing sound data for personal computers and other electronic audio devices…

Audio
.M3U

UTF-8 M3U Playlist

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…

Audio
.M4A

MPEG-4 Audio

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…

Audio
.PLS

PLS Playlist File

A PLS (Playlist) file is a plain text file format used to store a list of audio or video files for playback in media players. It's a simple and widely supporte…

Audio
.GIG

GigaSampler Instrument File

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…

Audio
.SMF

Standard MIDI File

A Standard MIDI File (SMF) is a universal file format designed to store MIDI (Musical Instrument Digital Interface) data, which consists of musical instruction…

Audio
.ALAC

Apple Lossless Audio Codec

The ALAC (Apple Lossless Audio Codec) file format is a lossless audio compression format developed by Apple Inc. It's designed to reduce the file size of audio…

Audio
.OPUS

Opus Audio File

Opus is a lossy audio coding format developed by the Internet Engineering Task Force (IETF) and standardized as RFC 6716. It is designed for efficient encoding…

Audio
.APE

Monkey's Audio

Monkey's Audio (APE) is a lossless audio compression format. This means that, unlike lossy formats like MP3 or AAC, no audio data is discarded during the compr…

Audio
.WAV

Waveform Audio File Format

The Waveform Audio File Format (WAV, or less commonly WAVE due to MS-DOS 8.3 file name limits) is a widely used audio file format standard, developed by Micros…

Audio
.WPL

Windows Media Player Playlist

A WPL file is a playlist format used by Windows Media Player. It's essentially an XML-based file that contains a list of media files (audio and video) and thei…

Audio
.PKF

Adobe Audition Peak File

Adobe Audition Peak files (.pkf) are auxiliary files created by Adobe Audition, a professional audio editing and digital audio workstation (DAW) software. Thes…

Audio
.WMA

Windows Media Audio

Windows Media Audio (WMA) is a proprietary audio codec developed by Microsoft. It is used for storing and playing audio files, often with digital rights manage…

Audio
.M4R

MPEG 4 Ringtone

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…

Audio
.TTS

Text-to-Speech Voice File

The .tts file extension is commonly associated with text-to-speech (TTS) voice files. These files typically contain pre-recorded audio generated from text usin…

Audio
.SF2

SoundFont 2

SoundFont 2 (SF2) is a widely recognized file format for storing musical instrument samples and synthesis parameters. Developed by E-mu Systems and Creative La…

Audio
.CPR

Cubase Project File

A CPR file is a project file created by Steinberg Cubase, a professional Digital Audio Workstation (DAW) used for music production, recording, arranging, and e…

Audio
.RPP

REAPER Project File

The RPP file extension is primarily associated with REAPER (Rapid Environment for Audio Production, Engineering, and Recording), a comprehensive digital audio…

Audio
.KAR

MIDI Karaoke File

The .kar file extension represents the MIDI Karaoke file format, which is a specialized variation of the Standard MIDI File (SMF). Unlike traditional digital a…

Audio
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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.