Will the M4A play on my phone or computer?

Yes. M4A (AAC) files play natively on iPhone, iPad, Mac, Windows 10/11, Android, and almost all modern music apps. If you use very old hardware or a car stereo, check its manual; some old devices only accept MP3.

Can I control the audio quality or bitrate?

Yes. You can pick the AAC bitrate before converting. 192 kbps is the default and a good balance for most uses. Use 128 kbps for voice, 256 kbps for music you want to keep at high quality. Higher bitrates mean larger files.

How much smaller is the M4A compared to the MP4?

Much smaller. A typical 4-minute, 1080p video MP4 (about 50 MB) becomes a 5–6 MB M4A at 192 kbps. The exact size depends on the bitrate and the complexity of the audio. If you choose a lower bitrate, the file shrinks even further.

Does this tool keep the original audio format?

No. The audio is always re-encoded to AAC at your chosen bitrate. This ensures compatibility but means a small quality loss if the source was already AAC. For most uses and bitrates above 128 kbps, this change is not noticeable.

Are there built-in alternatives to extract audio from MP4?

Yes, but with limitations. VLC can convert MP4 to M4A or MP3, but the interface is clunky. Audacity can import MP4 if you install FFmpeg, but exports as WAV or MP3, not M4A. QuickTime Player (Mac) can export audio but only as M4A or AIFF, and not with bitrate control. Windows Photos and Clipchamp do not export audio-only.

Can I batch convert several MP4s at once?

Not in this browser tool—one file at a time. This keeps memory use predictable and avoids browser crashes. If you have many files, desktop tools like ffmpeg (command line) or batch scripts may be better, but they require setup.

Does converting copyright-protected MP4s to M4A make them legal to share?

No. Changing the format does not change the copyright status. Only convert and use audio from files you own or have rights to. Videozify never uploads or stores your files.

Can I extract audio from a very large MP4?

Yes, as long as your device has enough memory. Most browsers can handle up to 1–2 GB files, but performance drops with bigger files. For huge files (over 4 GB), use a desktop app. Nothing is uploaded—everything runs in your browser.

MP4 → M4A

MP4 to M4A Converter

Drop a file here

Click to browse, or paste a file from the clipboard.

Choose file

An MP4 to M4A converter pulls the audio track from an MP4 video and saves it as a standalone M4A file. Videozify's tool encodes the audio to AAC at your chosen bitrate (default 192 kbps), drops the video, and gives you a pure audio file—no upload or watermark.

How to convert MP4 to M4A

Drop your MP4 video onto the box above, or click Browse to pick it from your device.
Choose your preferred audio bitrate—192 kbps is a good balance for music and voice.
Click Convert and wait for the progress bar to finish.
Download your M4A audio file when it appears—nothing leaves your browser.

Why convert MP4 to M4A?

MP4 files are everywhere: phone recordings, camera exports, video downloads, screen captures, and social media clips. But often, you only care about the audio—whether it's a podcast episode, a music video, a lecture, or a voice note. Pulling out just the audio makes the file much smaller and easier to store, send, or edit.

M4A (specifically, AAC in an M4A container) is widely supported. It's the default audio format for Apple devices, iTunes, and many modern music players. It offers better sound quality than MP3 at the same bitrate, and is more efficient for most spoken-word and music uses.

A typical 4-minute MP4 video (1080p, 30 fps, 50 MB) might shrink to a 5.5 MB M4A at 192 kbps—about one-tenth the size. The quality is set by your chosen bitrate. 128 kbps is fine for voice, 192–256 kbps is better for music. Lower bitrates save space but can sound flat.

This conversion is best when you want to listen, archive, or edit audio without the bulk of video. It's also handy for making ringtones, audiobooks, podcast episodes, or background tracks from your own video files.

To trim your M4A after converting, use the audio trimmer. To join multiple M4A files, try the audio joiner.

MP4 vs M4A: what's the difference?

Property	MP4	M4A
Extension	.mp4	.m4a
Type	Video + audio container	Audio-only container
Typical size (4 min)	50 MB (1080p video)	5.5 MB (192 kbps AAC)
Compression	H.264 video + AAC audio	AAC audio only
Quality	Video + audio, up to 320 kbps audio	Audio only, up to 320 kbps
Device support	Almost all phones, web, apps	iOS, Android, Windows, Mac, most players

MP4 is a multimedia container for video, audio, and sometimes subtitles. M4A is a streamlined audio-only format, almost always using AAC compression, that plays on nearly every modern device and app.

Does converting MP4 to M4A lower quality?

The tool drops the video and re-encodes the audio to AAC at your selected bitrate. If your MP4 already uses AAC, the tool still re-encodes (for compatibility and to match your chosen bitrate). The default is 192 kbps, which is transparent for most music and all voice. You can pick 128 kbps for podcasts or 256+ kbps for music you want to archive.

Lower bitrates shrink file size but can make music sound thin or add artifacts. Higher bitrates increase size with little audible benefit above 256 kbps for most people. If the source audio is lower quality (like a noisy recording or compressed video), increasing the bitrate will not improve it.

The output is always audio-only. If you need a video file with no picture (for certain editors), consider exporting as MP4 with a black frame instead. For pure listening, M4A is the more efficient choice.

When should you NOT convert MP4 to M4A?

If you need to keep the video—such as for editing, captioning, or sharing on video platforms—do not convert to M4A. This process removes all video and keeps only the audio.

If your workflow or device only supports MP3, use an MP4 to MP3 converter instead. Some older car stereos and voice recorders cannot read M4A files.

If the source audio is already poor quality (like a 96 kbps track in the MP4), re-encoding to a higher bitrate M4A will not restore lost detail. Choose a bitrate close to the source bitrate, or accept the loss if space is the main concern.

If you want to extract the audio without changing its format or bitrate, tools like ffmpeg on the command line can sometimes copy the audio stream directly, but this may not work for every MP4.

Frequently asked questions

Will the M4A play on my phone or computer?: Yes. M4A (AAC) files play natively on iPhone, iPad, Mac, Windows 10/11, Android, and almost all modern music apps. If you use very old hardware or a car stereo, check its manual; some old devices only accept MP3.
Can I control the audio quality or bitrate?: Yes. You can pick the AAC bitrate before converting. 192 kbps is the default and a good balance for most uses. Use 128 kbps for voice, 256 kbps for music you want to keep at high quality. Higher bitrates mean larger files.
How much smaller is the M4A compared to the MP4?: Much smaller. A typical 4-minute, 1080p video MP4 (about 50 MB) becomes a 5–6 MB M4A at 192 kbps. The exact size depends on the bitrate and the complexity of the audio. If you choose a lower bitrate, the file shrinks even further.
Does this tool keep the original audio format?: No. The audio is always re-encoded to AAC at your chosen bitrate. This ensures compatibility but means a small quality loss if the source was already AAC. For most uses and bitrates above 128 kbps, this change is not noticeable.
Are there built-in alternatives to extract audio from MP4?: Yes, but with limitations. VLC can convert MP4 to M4A or MP3, but the interface is clunky. Audacity can import MP4 if you install FFmpeg, but exports as WAV or MP3, not M4A. QuickTime Player (Mac) can export audio but only as M4A or AIFF, and not with bitrate control. Windows Photos and Clipchamp do not export audio-only.
Can I batch convert several MP4s at once?: Not in this browser tool—one file at a time. This keeps memory use predictable and avoids browser crashes. If you have many files, desktop tools like ffmpeg (command line) or batch scripts may be better, but they require setup.
Does converting copyright-protected MP4s to M4A make them legal to share?: No. Changing the format does not change the copyright status. Only convert and use audio from files you own or have rights to. Videozify never uploads or stores your files.
Can I extract audio from a very large MP4?: Yes, as long as your device has enough memory. Most browsers can handle up to 1–2 GB files, but performance drops with bigger files. For huge files (over 4 GB), use a desktop app. Nothing is uploaded—everything runs in your browser.