Free M4A Audio Converter

Convert Audio to M4A Format

M4A is the standard audio format for iTunes, Apple Music, and iPhone voice memos. Convert any audio file to M4A (AAC or ALAC) for seamless Apple ecosystem integration — no software required.

Perfect for iTunes & Apple Music AAC and ALAC quality options Preserves artwork and tags

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Up to 100 MB free • Outputs: M4A

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Files deleted in 2h

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Simple & Fast

How to Use M4A Converter

Convert your files in three simple steps — no software, no signup.

Upload Your Audio

Choose any audio file — MP3, WAV, FLAC, OGG, AAC, WMA, or a video file — and upload it to begin the conversion.

Choose M4A Type

Select AAC (lossy, small file size) or ALAC (lossless, larger file) inside the M4A container depending on your quality requirements.

Download M4A File

Download your .m4a file and add it directly to your iTunes library, iPhone, iPad, or any Apple Music-compatible app.

Features

Why Use M4A Converter?

iTunes & Apple Music Native

M4A is the native format of iTunes and Apple Music. Files drop in without any conversion warnings or compatibility errors.

Voice Memo Compatible

iPhone and iPad Voice Memos save recordings as M4A files. Our converter helps you work with these files on any platform.

ALAC Lossless Option

Apple Lossless (ALAC) stores audio in M4A containers without any quality loss — an alternative to FLAC for Apple-centric workflows.

Full Metadata Support

M4A supports rich iTunes-style metadata including track title, artist, album, year, genre, lyrics, and embedded album artwork.

Works Across Apple Devices

Converted M4A files play natively on iPhone, iPad, Mac, Apple TV, Apple Watch, and HomePod with no conversion needed.

DRM-Free Output

All conversions produce standard, DRM-free M4A files that you own outright and can use on any device.

Compatibility

Supported Formats

All the formats you need, all in one place.

Format	Description	Extension	Best Used For
MP3 → M4A	Convert MP3 to iTunes-native M4A	`.mp3`	Adding music to iTunes or Apple Music library
WAV → M4A	Compress studio WAV to M4A AAC	`.wav`	Recording studio delivery for Apple distribution
FLAC → M4A	Open lossless to Apple lossless ALAC	`.flac`	Migrating FLAC music library to Apple ecosystem
OGG → M4A	Convert Vorbis to Apple-friendly M4A	`.ogg`	Cross-platform collection unification
AAC → M4A	Repackage AAC codec into M4A container	`.aac`	iTunes library file format standardisation
WMA → M4A	Windows Media Audio to Apple M4A	`.wma`	Switching from Windows PC to Mac or iPhone
MP4 → M4A	Strip video, keep audio as M4A	`.mp4`	Extracting music from video for iPhone

FAQ

Frequently Asked Questions

AAC is a codec (audio encoding standard) while M4A is a container format (file wrapper). An M4A file typically contains AAC-encoded audio. Think of AAC as the engine and M4A as the car body.

ALAC (Apple Lossless Audio Codec) is Apple's lossless compression standard, stored in M4A containers. It preserves 100% of the original audio data — similar to FLAC but designed for Apple software. Choose ALAC when quality is paramount.

Yes. M4A files play on Android via VLC, Google Play Music, and most media players. On Windows, they work in Windows Media Player (with the right codec), VLC, and iTunes for Windows.

No — both FLAC and ALAC are lossless codecs. Converting between them involves no quality loss. The only change is the container format, making your files compatible with Apple's ecosystem.

Download the file, then drag it into your iTunes or Music app window, or go to File → Add to Library and select the M4A file. It will appear immediately in your library with all its metadata.

Files purchased from the iTunes Store in the past may have had DRM (FairPlay). M4A files converted by TransmuteBox are completely DRM-free. However, we cannot remove DRM from files that are already DRM-protected.

Real-World Uses

Who Uses M4A Converter?

From everyday users to professionals — see how people rely on this tool every day.

iTunes User

Add Any Song to Your iTunes Library

Convert MP3, FLAC, or OGG files to M4A (AAC) so they import cleanly into iTunes or Apple Music without format warnings.

iPhone Owner

Create Custom iPhone Ringtones

Convert and trim audio to M4A, rename to .m4r, and sideload a custom ringtone into your iPhone without needing the App Store.

Field Recorder

Work with iPhone Voice Memos

iPhone Voice Memos save as M4A. Convert other formats to M4A to keep your entire voice recording library in one consistent format.

Audiophile

Convert FLAC to Apple Lossless (ALAC)

Convert FLAC archives to M4A (ALAC) for seamless playback in Apple Music and on HomePod without any quality loss.

Podcast Producer

Submit to Apple Podcasts with AAC Audio

Apple Podcasts recommends M4A/AAC for podcast episodes. Convert WAV recordings to M4A for compliant, compact episode files.

Mac User

Unify Media Library on macOS

Consolidate a mixed music collection of WMA, OGG, and MP3 files into M4A for native macOS and QuickTime compatibility.

Why TransmuteBox?

TransmuteBox vs. Alternatives

See how we compare to desktop software and other online converters.

Feature	Our Tool TransmuteBox	Desktop App	Other Online
iTunes / Apple Music native
ALAC lossless option
Metadata / artwork support
DRM-free output
No software install
Video → M4A extraction
Free to use

Under the Hood

Technical Specifications

Built on industry-standard open-source tools for maximum quality and reliability.

Limits & Restrictions

Max file size: 500 MB
Output container: .m4a (MP4)
Supports AAC-LC and ALAC codecs

FFmpeg M4A AAC ALAC iTunes Apple Music

Conversion Engine

FFmpeg 6.x · libfdk-aac (AAC-LC) · ALAC encoder

Output Quality

AAC: up to 320 kbps; ALAC: lossless (equivalent to FLAC quality)

Average Speed

Typical encode: 5–15 seconds for a 100 MB source file

Data Security

HTTPS transfer · isolated temp dir · auto-purged in 2 h

Ecosystem

iTunes / Apple Music

Lossless

ALAC option available

Metadata

Full iTunes tags + art

Auto-Delete

2 hours

Complete Guide

M4A Audio Files: iTunes, ALAC, and the Apple Ecosystem

M4A is the file extension Apple uses for audio-only files stored in the MPEG-4 container format. It is the native format of iTunes, Apple Music, iPhone Voice Memos, and GarageBand exports. Understanding M4A — and the two codecs it can carry — helps you work fluently within the Apple ecosystem and convert other formats into it correctly.

What Is Inside an M4A File?

An M4A file is an MP4 container (.mp4) with only an audio track and the file extension changed to .m4a. The container can hold two different codecs: AAC-LC (lossy, most common) or ALAC (Apple Lossless Audio Codec, lossless). When iTunes encodes a song, it produces AAC inside an M4A container. When you rip a CD in lossless mode in the Music app, it produces ALAC inside an M4A container. The .m4a extension is shared by both, so the only way to know which codec is in use is to inspect the file properties.

ALAC: Apple's Answer to FLAC

Apple Lossless Audio Codec (ALAC) was introduced in 2004 and open-sourced in 2011. Like FLAC, it compresses audio without any quality loss — decoding always produces bit-identical PCM. ALAC files stored in M4A containers are supported natively on every Apple device and in the Music app on macOS. The main trade-off vs FLAC is ecosystem: ALAC works best in the Apple world, while FLAC has broader cross-platform support. Converting between the two involves zero quality loss — it is purely a container and codec swap.

AAC Bitrate Recommendations for M4A Files

When creating lossy M4A files with AAC, your bitrate choice determines quality and file size. Apple Music uses 256 kbps AAC as its streaming quality, which is considered perceptually transparent by most listeners. For podcast delivery, 128 kbps stereo or 96 kbps mono is the recommended range. For voice memos and spoken recordings, 64–96 kbps mono sounds clear and keeps files tiny. Always choose the lowest bitrate that meets your quality requirements to save storage and bandwidth.

Creating iPhone Ringtones from M4A

iPhone ringtones are simply M4A audio files with the .m4r extension. To create a custom ringtone: use the Audio Cutter to trim your audio clip to 30 seconds or less, convert it to M4A (AAC) using this tool, download the file, rename the extension from .m4a to .m4r, and then drag it into iTunes or Music on your Mac. After syncing, the ringtone appears in Settings → Sounds & Haptics on your iPhone. No third-party app or jailbreak required.

Importing M4A Files into the Apple Music App

Apple Music (formerly iTunes) accepts M4A files for local library import. Simply drag and drop the .m4a file onto the Music app window, or use File → Import. The file will appear with all its embedded metadata — title, artist, album, artwork, genre. If you are migrating a large library of non-Apple formats (FLAC, WMA, OGG) to Apple, converting to M4A (AAC for casual listening, ALAC for audiophile quality) ensures every track behaves natively in your Apple ecosystem.