m4a

Bestandsformaat

Over M4A-bestanden

M4A (M4A Audio · Audioformaat)

Uitgebracht 2004 Door Apple / MPEG

M4A Audio (.m4a) is een standaard bestandsformaat dat door KaijuConverter wordt ondersteund voor gegevensuitwisseling, archivering en platformonafhankelijke conversie.

Categorie

Audio Files

Extensie

.m4a

MIME-type

audio/mp4, audio/x-m4a

Bruikbaar als

Invoer Uitvoer

Het verhaal

HOE M4A
IS ONTSTAAN.

2004

2009

M4A — MPEG-4 Audio — is the audio-only companion to the MP4 video container. Apple popularized the extension with the iTunes Store in 2004 when it sold the first songs as AAC-encoded files wrapped in the MP4 container and renamed them .m4a to make it obvious they were audio. Technically an .m4a and a video .mp4 share the same internal structure; only the tracks inside differ.

The format rode Apple’s success through iPods, iPhones, and Apple Music. Every track purchased from the iTunes Store was an M4A with the AAC codec; DRM-protected variants used the .m4p extension and eventually disappeared when the store went DRM-free in 2009. Today M4A is the de-facto audio format for Apple’s ecosystem and an increasingly common alternative to MP3 on the wider web.

WEETJES &
TRIVIA.

An .m4a file and an .mp4 file share the same internal structure — they only differ by which media tracks are present.

Apple sold over 10 billion M4A files through the iTunes Store between 2003 and 2020.

AAC (the usual codec inside M4A) typically sounds equal to a 256 kbps MP3 at only 128 kbps — about half the file size.

The extension .m4p used to mark DRM-protected iTunes purchases; Apple dropped DRM on music in 2009.

Apple Lossless (ALAC) files are also wrapped in an .m4a container, which is why some M4As are enormous.

STERKE PUNTEN &
BEPERKINGEN.

Sterke punten

Superior audio quality to MP3 at the same bitrate (AAC codec).
Native support across Apple, iOS, Android, and Windows.
Carries rich metadata: album art, chapters, lyrics, podcast bookmarks.
Same container as MP4 — tooling overlaps with video workflows.
Lossless variant (ALAC inside M4A) for audiophile archiving.

Beperkingen

AAC patents still active in some jurisdictions — licensing fees apply for encoders.
Seeking in variable-bitrate M4As can drift without an index atom.
Less universal than MP3 on older hardware (pre-2010 car stereos, cheap MP3 players).
Container overhead is larger than a raw ADTS AAC stream.

Typische bestandsgroottes

4-minute song (AAC 128 kbps)

4-5 MB

4-minute song (AAC 256 kbps)

8-10 MB

1-hour podcast (64 kbps)

28 MB

4-minute song (Apple Lossless)

25-35 MB

Technische specificaties

MIME type: audio/mp4
Extension: .m4a (and .m4b for audiobooks, .m4p for legacy DRM)
Container: ISO Base Media File Format (ISOBMFF)
Codecs: AAC-LC, HE-AAC, ALAC
Max sample rate: 96 kHz

STUDIO-TOOLS VOOR M4A

Gespecialiseerde Tools voor .M4A-Bestanden

Alle 45 tools bekijken →

compress →

MP3 Comprimeren Online Gratis

Verklein MP3-, WAV-, M4A- en FLAC-audiobestanden door de bitrate (64k–192k) en mono/stereo-kanalen aan te passen.

convert →

Audio knippen Online (MP3, WAV)

Knip MP3-, WAV-, FLAC-, M4A- en OGG-audiobestanden op de seconde nauwkeurig bij met directe voorbeluistering in uw browser.

extract →

Extract Audio from Video

Gebruik Extract Audio from Video gratis online op KaijuConverter. Directe bestandsverwerking in je browser zonder registratie en met volledige privacy.

extract →

Video to MP3 Audio Extractor

Gebruik Video to MP3 Audio Extractor gratis online op KaijuConverter. Directe bestandsverwerking in je browser zonder registratie en met volledige privacy.

CONVERTEER VANUIT
M4A

m4a mp3 m4a wav m4a flac m4a aac m4a ogg m4a opus m4a wma m4a aiff m4a ac3 m4a au m4a amr m4a aif m4a gsm m4a voc m4a w64 m4a sox m4a snd m4a wv m4a spx m4a mp2

CONVERTEER NAAR
M4A

mp3 m4a wav m4a flac m4a aac m4a ogg m4a opus m4a wma m4a aiff m4a ac3 m4a au m4a caf m4a amr m4a mka m4a ape m4a alac m4a aif m4a gsm m4a voc m4a w64 m4a shn m4a sox m4a snd m4a 8svx m4a tta m4a wv m4a spx m4a mp2 m4a dsf m4a dff m4a mp4 m4a mov m4a mkv m4a avi m4a webm m4a flv m4a wmv m4a mpeg m4a 3gp m4a ogv m4a vob m4a m4v m4a ts m4a m2ts m4a mts m4a swf m4a mpg m4a asf m4a dv m4a f4v m4a h264 m4a h265 m4a m2v m4a mjpeg m4a mxf m4a rm m4a rmvb m4a divx m4a nut m4a y4m m4a dts m4a mid m4a ra m4a tak m4a

Veelvoorkomende toepassingen

iTunes music, Apple podcasts, audiobooks, voice memos.