MP4 to M4A on iPhone
Convert MP4 to M4A on your iPhone. No app to download. Open your browser, drop your file, and convert. Done in seconds.
Drop your MP4 file here or click to browse
MP4 (.mp4) · Max 20 MB
Open AudioUtils in Safari on iOS. The converter works on iPhone 8 and newer. No App Store download needed. AudioUtils uses WebAssembly to run the conversion engine locally. Your audio stays on your device.
On iPhone, converted files save to your Files app. Tap the download link and choose where to save.
Both MP4 and M4A are lossy formats. Each re-encode can degrade quality slightly. Convert once and keep the result. The output is identical regardless of which device or browser you use.
Frequently Asked Questions
Is M4A better than MP3 for MP4 audio extraction?
Yes. MP4 files typically contain AAC audio. Extracting to M4A preserves the original AAC stream without re-encoding. Converting to MP3 would require re-encoding and introduce quality loss.
What happens to the video track?
Discarded entirely. Only the audio track is extracted and wrapped in an M4A container.
Will metadata transfer?
Basic metadata (title, artist, album) transfers when present in the source MP4.
About MP4
The most common video container format. Used by YouTube, smartphones, and cameras. Extract audio from any MP4 file instantly.
About M4A
Apple's preferred audio format. Better quality than MP3 at same bitrate. Default for iTunes and Apple devices.