MP4 to M4A Converter
Extract the audio from MP4 video as M4A (AAC) for iTunes, Apple Music and iPhone — free, fast, no signup, no watermark.
up to 50 files at once
auto-delete in 24h · no signup · no watermark
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How to convert MP4 to M4A online
- Click "Browse Files" or drag your MP4 file into the converter above (up to 200 MB free, 500 MB with an account).
- The target format is preset to M4A — adjust quality options in the picker if you need to.
- Hit "Convert". Your file uploads over an encrypted connection and converts automatically in the cloud — nothing to install.
- Click the green "Download" button to save your M4A file. The original is deleted immediately and the result auto-deletes after 24 hours.
That is the entire flow — no email address, no software install, no watermark on the output. The page you are reading handles MP4 to M4A from start to finish.
What's the difference between MP4 and M4A?
MP4 (MPEG-4 Part 14) and M4A (MPEG-4 Audio) solve different problems: MP4 is a media container format built for universal video playback and sharing, while M4A is a lossy compression format whose strength is iPhone voice memos, Apple Music files. In practice you will meet MP4 when dealing with universal video playback and sharing, and reach for M4A when you need iPhone voice memos, Apple Music files — the table below compares them point by point.
| MP4 | M4A | |
|---|---|---|
| Full name | MPEG-4 Part 14 | MPEG-4 Audio |
| Developed by | MPEG (ISO/IEC) | Apple / MPEG |
| Released | 2001 | 2001 |
| Compression | Media container | Lossy compression |
| Typical use | universal video playback and sharing | iPhone voice memos, Apple Music files |
| File extension | .mp4 | .m4a |
| MIME type | video/mp4 | audio/mp4 |
Why convert MP4 to M4A?
MP4 (MPEG-4 Part 14) is a multimedia container standardized in 2001 that bundles video, audio, and subtitles in one file. Usually carrying H.264 video with AAC audio, it is the most compatible video format in existence — every phone, browser, TV, and editor plays MP4. Here is when M4A is the better choice:
- →M4A/AAC sounds better than MP3 at the same file size — the Apple ecosystem default.
- →Native format for iPhone and iTunes libraries.
- →It runs in the cloud — 10 free conversions a day with files up to 200 MB (20/day and 500 MB with a free account) — so even a phone or an old laptop converts at full speed.
Before you convert: three quick tips
- ●Decide the use first: 320 kbps for critical listening, 128 kbps when size matters most, and the 192 kbps default for everything else.
- ●Core audio metadata (title, artist) carries over to M4A where the format supports it; extras like embedded cover art vary by format.
- ●Keep your original MP4 — conversion never modifies it, and if you later need a different target format, starting from the original always gives the best quality.
M4A conversion settings explained
Bitrate controls the quality-versus-size tradeoff of your M4A file. Filevo defaults to 192 kbps — the sweet spot for music: about 1.4 MB per minute of audio, indistinguishable from the source for the vast majority of listeners.
How to choose: 128 kbps suits voice, podcasts, and audiobooks (≈0.96 MB per minute — fully transparent for speech); 192 kbps is the everyday music setting (≈1.4 MB per minute); 320 kbps is for archiving and critical listening (≈2.4 MB per minute, the ceiling of what the format can deliver).
Rule of thumb: when unsure, keep the default. Pick 320 kbps for a music collection you plan to keep, or 128 kbps to halve the size of a voice note before sending it.
How the conversion works
Filevo's MP4 to M4A conversion is powered by FFmpeg, the open-source media framework behind much of the world's video infrastructure. We run it with compatibility-first settings tuned for everyday playback, and stream progress back to your browser in real time. Because everything runs in the cloud, your device's CPU stays idle — the browser only uploads and downloads.
Why convert MP4 to M4A?
M4A is the native audio format of Apple’s world — iTunes purchases, Apple Music, Voice Memos and GarageBand all use it. When you extract audio from a video as M4A, the file slots straight into your iTunes or Apple Music library with full metadata, album art, playlists and iCloud sync. Converting MP4 to M4A is the natural choice when you want a podcast, lecture or song pulled from a video to live cleanly on Apple devices — and the audio alone is tiny: a 200 MB clip becomes a 5–15 MB M4A.
M4A is built for Apple
The AAC codec inside M4A was designed as the successor to MP3, and it delivers better quality at the same bitrate — a 128 kbps AAC file sounds comparable to a 192 kbps MP3. More importantly, M4A plays natively on every Apple device — iPhone, iPad, Mac, Apple Watch, HomePod and Apple TV — and in iTunes and Apple Music with no extra apps. For anyone living in the Apple ecosystem, that native fit is the real reason to choose M4A over MP3 when extracting audio.
A second lossy pass — the honest detail
An MP4’s audio track is usually already AAC, and the M4A produced here re-encodes to AAC, so it’s a second lossy pass rather than a perfect copy — a small amount of detail can be lost. Pick a bitrate at or above the source and it’s inaudible in normal listening. Note too that "M4A" can mean AAC (lossy) or ALAC (lossless); this converter outputs AAC, which is the right fit for extracting listenable audio from video, not for archival-grade lossless.
Convert MP4 to M4A on any device
On iPhone or Mac: open this page in your browser, tap Browse Files and pick the MP4 — no app needed. On Windows or Mac: drag the MP4 straight from Explorer or Finder into the converter above. Everything runs in the cloud, and the M4A downloads ready to add to Apple Music or sync to your iPhone.
What is MP4?
MP4 (MPEG-4 Part 14) is a multimedia container standardized in 2001 that bundles video, audio, and subtitles in one file. Usually carrying H.264 video with AAC audio, it is the most compatible video format in existence — every phone, browser, TV, and editor plays MP4.
| Full name | MPEG-4 Part 14 |
| Developer | MPEG (ISO/IEC) |
| Released | 2001 |
| MIME | video/mp4 |
What is M4A?
M4A is an audio container introduced with Apple iTunes in 2001, normally holding AAC-encoded audio. It delivers better quality than MP3 at the same bitrate and is the default recording and music format across iPhone, iPad, and Mac.
| Full name | MPEG-4 Audio |
| Developer | Apple / MPEG |
| Released | 2001 |
| MIME | audio/mp4 |
Filevo vs other MP4 to M4A converters
An honest comparison — CloudConvert and Convertio are capable tools; here is where Filevo differs:
| Filevo | CloudConvert | Convertio | |
|---|---|---|---|
| Free tier | 10/day | 10/day | 10 credits/day |
| No signup needed | Yes | Yes | Yes |
| Watermarks | None | None | None |
| Ads on free tier | No | No | Yes |
| Pricing model | 1 file = 1 credit, shown upfront | Per conversion minute | Credit packs |
Privacy & file security
Filevo deletes your uploaded MP4 file immediately after conversion and removes the converted M4A within 24 hours. Everything travels over TLS encryption, processing is fully automated with zero human access, and your files are never used for AI training. See our Privacy Policy for details. Privacy Policy →
MP4 to M4A converter FAQ
How do I convert MP4 to M4A for free?
Drop your MP4 file into the converter at the top of this page, confirm M4A as the target, click Convert, and download the result. It is genuinely free: 10 free conversions a day with files up to 200 MB (20/day and 500 MB with a free account), no watermarks, no software to install, no account required.
Is it safe to convert MP4 files online?
Yes. Transfers are TLS-encrypted end to end, and conversion is fully automated — no human ever sees your files. Your uploaded MP4 is deleted the moment conversion finishes, and the converted M4A auto-deletes after 24 hours (you can delete it sooner). We never use your files for AI training or share them with anyone.
Will I lose quality converting MP4 to M4A?
Filevo extracts the audio track from your MP4 and re-encodes it to M4A at the bitrate you choose; the video track is discarded. At 192 kbps or higher the result is audibly transparent for most content. Note that the source recording sets the ceiling — conversion can never make audio sound better than the original.
How long does MP4 to M4A conversion take?
It depends on length and resolution: short clips typically finish in well under a minute, while longer videos process at roughly real-time speed or faster. Upload time depends on your connection — for large files, uploading is usually the longest step.
Can I convert MP4 to M4A on iPhone or Android?
Yes. Filevo runs entirely in the browser, so it works the same on iPhone, Android, tablets, and computers — no app to install. On mobile, tap Browse Files to pick from your photos or files.
What's the maximum file size?
Anonymous conversions accept files up to 200 MB; a free account raises that to 500 MB. Paid plans go from 1 GB up to 10 GB per file, with higher daily limits and priority queues.
Can I convert multiple files at once?
Yes. Drop up to 50 files at once — they roll through the queue automatically. Pick a target format per file or set one per category, then download results individually or grab everything as a single ZIP.
What codec does the converted MP4 use?
Filevo encodes MP4 with H.264 video and AAC audio with the faststart flag — the most compatible combination, optimized to start playing instantly when streamed.
Why choose M4A over MP3 when extracting audio?
M4A (AAC) is native to Apple — it imports into iTunes and Apple Music with full metadata and iCloud sync, and plays on every Apple device without extra apps. It also sounds a bit better than MP3 at the same bitrate. If you’re outside the Apple ecosystem, MP3 may be the more universal pick.
Does converting MP4 to M4A lose quality?
The audio re-encodes to AAC, so it’s a second lossy pass — technically a little loss, but inaudible at a sensible bitrate (256 kbps is excellent). It can’t exceed the quality already in the MP4’s audio track, so match or slightly exceed the source.
How small will the M4A be?
Very small, because only the audio is kept. A 200 MB, 10-minute 1080p MP4 typically yields a 5–15 MB M4A depending on bitrate. The video is discarded entirely, so size depends only on the audio length and the bitrate you choose.
Whether you need iPhone voice memos, Apple Music files or simply a file that works where MP4 will not open, the converter above turns MP4 into M4A in seconds — free, private, and with nothing to install. Bookmark this page for the next time a MP4 file refuses to cooperate.
Last updated: 2026-07-27