Convert MP4 to M4A Online Free
Extract the AAC audio track from your MP4 video and save it as M4A — the native Apple audio format. Ideal for iTunes libraries, iPhone ringtones, and Apple ecosystem audio.
By ChangeThisFile Team · Last updated: March 2026
ChangeThisFile extracts the AAC audio from your MP4 video and saves it as M4A using FFmpeg on our secure servers. M4A is the native Apple audio format with excellent quality and small file size. Files are auto-deleted after conversion, free with no signup required.
Convert MP4 to M4A
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MP4 vs M4A: Format Comparison
Key differences between the two formats
| Feature | MP4 | M4A |
|---|---|---|
| Type | Video container (audio + video) | Audio-only container (MPEG-4 audio) |
| Audio codec | AAC, MP3, or AC-3 | AAC (identical audio data, different container) |
| File size | Large (includes video stream) | Small — audio only, AAC-compressed |
| Compatibility | Universal video players | Apple devices, iTunes, most modern players |
| Re-encoding | N/A | Often copy-stream (no quality loss) |
| Metadata | Title, chapters, subtitles | iTunes tags: artist, album, cover art, lyrics |
| Use case | Video sharing and streaming | Apple Music library, iPhone, iPad, Mac |
When to Convert
Common scenarios where this conversion is useful
Add video audio to iTunes or Apple Music library
M4A is the native format for Apple Music and iTunes. Convert your MP4 videos to M4A to import audio content directly into your Apple library, complete with metadata and cover art support.
Create iPhone or iPad ringtones
iPhone ringtones use M4R format, which is simply a renamed M4A. Extract audio from an MP4, save as M4A, then rename to .m4r and import to iTunes to use as a custom ringtone.
Extract interview or speech audio for Apple podcast editing
If your podcast or interview is recorded as an MP4 video, convert to M4A for easy editing in GarageBand, Logic Pro, or other Apple tools that natively handle AAC/M4A.
Reduce MP4 file size for sharing on Apple devices
Strip the video from an MP4 to get just the audio as M4A. The resulting file is a fraction of the size, easy to AirDrop or share via iMessage without video overhead.
Preserve audiobook audio from MP4 recordings
If you have audiobook or lecture content in MP4 format, extract to M4A for playback in Audiobooks app or Apple Books, with chapter markers intact if present in the source.
Who Uses This Conversion
Tailored guidance for different workflows
Content Creators
- Convert MP4 footage to M4A for uploading to YouTube, TikTok, or social media platforms
- Transform MP4 screen recordings to M4A for sharing in blog posts or tutorials
Video Editors
- Convert MP4 raw footage to M4A for importing into editing software like Premiere or DaVinci Resolve
- Transform MP4 project exports to M4A for client delivery or final distribution
Social Media Managers
- Convert MP4 brand videos to M4A to meet platform-specific format requirements
- Transform MP4 ad creatives to M4A for cross-platform publishing campaigns
How to Convert MP4 to M4A
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1
Upload your MP4 file
Drag and drop your .mp4 onto the converter or click to select it. Files up to 500MB are supported.
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2
Server-side audio extraction
Your MP4 is uploaded over HTTPS and FFmpeg extracts the audio track. When the MP4 contains AAC audio, it is stream-copied into the M4A container with no re-encoding and no quality loss. Processing takes just a few seconds.
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3
Download your M4A file
Click Download to save the .m4a file to your device. The uploaded MP4 and output M4A are automatically deleted from our servers.
Frequently Asked Questions
Both MP4 and M4A are MPEG-4 containers. MP4 holds video and audio streams, while M4A holds audio only. The AAC audio data inside is often identical — M4A is essentially an MP4 renamed to signal it is audio-only.
When the MP4 contains AAC audio, FFmpeg can copy the audio stream directly into the M4A container without re-encoding, resulting in zero quality loss. If the MP4 uses a different codec, it is re-encoded to AAC.
Yes. M4A is supported by VLC, Windows Media Player, Foobar2000, Android 3.1+, and most modern media players. It is not Apple-exclusive despite its association with Apple products.
Yes, with one extra step. Rename the .m4a file to .m4r, then import it into iTunes and sync it to your iPhone. Ringtones must also be under 40 seconds — trim your audio before converting if needed.
M4A (AAC) generally sounds better than MP3 at the same bitrate because AAC is a more modern codec. A 128 kbps M4A typically sounds comparable to a 192 kbps MP3.
If your MP4 contains chapter markers, FFmpeg will attempt to preserve them in the M4A output. Chapter support in M4A is well-supported by Apple devices and Audiobooks app.
Yes. ChangeThisFile is free with no file conversion limits. Files up to 500MB are supported. There is no signup or subscription required.
Yes. M4A supports embedded cover art in the iTunes metadata format. If your MP4 had embedded thumbnail metadata, it may carry over to the M4A output.
Yes. Open the converter in Safari on your iPhone, upload the MP4 from your Files app or camera roll, and download the M4A directly. The file will save to your Downloads folder.
All uploads use HTTPS encryption. Files are automatically deleted from our servers immediately after the conversion completes. We never access, store, or share your files.
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