To convert MP4 to M4A, choose your MP4 videos above, adjust the options if needed and press "Convert to M4A". The M4A downloads instantly: free, with no sign-up, and the file never leaves your device.
About the MP4 to M4A Converter
Need to turn a MP4 file into M4A? This free converter changes MP4 videos into M4A in a few seconds, right in your browser. People usually convert because sometimes you only need the audio track, a GIF or still frames from the video, while M4A gives you AAC audio in M4A for Apple devices. M4A files open in iPhone, iTunes, Apple Music, VLC, Windows Media Player and Android.
Audio and video are processed by FFmpeg compiled to WebAssembly, the same open-source engine behind VLC and HandBrake, running inside your browser tab. Because everything happens on your own device, your videos are never uploaded, stored or seen by anyone else, which makes it safe for family videos, client footage and private recordings.
What to expect: only the soundtrack is kept and encoded as M4A; the processing engine (about 30 MB) is downloaded once and then cached by your browser.
How to use the MP4 to M4A Converter
- Click "Choose files" or drag your MP4 videos onto the box. You can add several at once.
- Choose the M4A bitrate: 128 kbps for speech, 192 kbps for music or 320 kbps for the best quality.
- Press "Convert to M4A". The conversion runs on your device and shows its progress.
- Download each M4A file, or use "Download all (ZIP)" when you converted several.
- Open the result in iPhone or iTunes to check it; your original MP4 is never changed.
Tips & benchmarks
- AAC in M4A sounds better than MP3 at the same bitrate; 160–192 kbps is excellent for music.
- MP4 is lossless and M4A is not, so keep your original MP4 as the master copy and use the M4A for sharing.
- Very large videos (over about 1 GB) may exceed the memory of a phone browser; trim them first with our Trim Video tool.
- Keep the file name simple (letters, numbers and hyphens) if you plan to upload the M4A to a website or government portal.
Frequently asked questions
How do I convert MP4 to M4A?
Click "Choose files", select your MP4 videos, adjust the options if you want, and press "Convert to M4A". The M4A downloads immediately; with several files you can download everything as one ZIP.
Is this MP4 to M4A converter free and safe?
Yes. It is completely free, with no sign-up, no daily limit and no watermark. The conversion runs inside your browser, so your videos never leave your phone or computer and nothing is stored on News Appite's servers.
Does converting MP4 to M4A lose quality?
M4A is a lossy format, so the audio is re-compressed. At 192 kbps or more most listeners cannot hear a difference from the source.
Can I convert several MP4 files at once?
Yes. Add as many MP4 files as you like; they are converted one after another and you can download them individually or together as a ZIP.
Does it work on iPhone, Android and Mac?
Yes. The converter works in any modern browser, including Chrome, Safari, Edge and Firefox, on Android, iPhone, iPad, Windows, macOS and Linux. No app is needed. The audio and video engine is a larger download the first time, so Wi-Fi is recommended.
What is the difference between MP4 and M4A?
MP4 (MPEG-4 Part 14) is a video container (usually H.264 + AAC) best suited to sharing on WhatsApp, Instagram and YouTube and playing on any device. M4A (MPEG-4 Audio) is a AAC audio in an MP4 container best suited to iPhone, iTunes and Apple Music libraries and voice memos.
Is there a file size limit?
There is no upload limit, because nothing is uploaded. The practical limit is your device's memory: files of a few hundred megabytes work on most computers, and phones handle smaller files comfortably.
How do I convert MP4 to M4A on Windows 10 or 11?
Open this page in Chrome or Edge, drag the MP4 files onto the upload box and click "Convert to M4A". Nothing has to be installed, and the files are saved to your Downloads folder.
How do I convert MP4 to M4A on a Mac?
Open this page in Safari or Chrome, drop the MP4 files onto the upload box and click "Convert to M4A". It works the same on Intel and Apple silicon Macs.
MP4 ko M4A kaise kare?
Is page par "Choose files" dabaiye, apni MP4 file chuniye aur "Convert to M4A" par click kijiye. M4A file turant download ho jaati hai. Ye bilkul free hai, sign-up nahi chahiye, aur aapki file kisi server par upload nahi hoti.
MP4 vs M4A: format comparison
| MP4 | M4A | |
|---|---|---|
| Full name | MPEG-4 Part 14 | MPEG-4 Audio |
| Type | Video container (usually H.264 + AAC) | AAC audio in an MP4 container |
| Created by | ISO/MPEG, 2001 | MPEG-4, popularised by Apple iTunes (2003) |
| Compression | Lossy (H.264/AAC) | Lossy (AAC) |
| File extension | .mp4 | .m4a |
| MIME type | video/mp4 | audio/mp4 |
| Best for | Sharing on WhatsApp, Instagram and YouTube and playing on any device | IPhone, iTunes and Apple Music libraries and voice memos |
| Opens in | every phone, smart TV, browser, VLC, Windows and macOS | iPhone, iTunes, Apple Music, VLC, Windows Media Player and Android |
What is a MP4 file?
MP4 is the most compatible video format in the world, normally carrying H.264 video and AAC audio. It plays on every phone, TV, browser and social network, from WhatsApp to YouTube and Instagram.
What is a M4A file?
M4A is an MPEG-4 file that holds AAC audio. Apple Music, iPhone voice memos and many recorders use it because AAC sounds better than MP3 at the same bitrate.
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