Convert MP4 to M4A Online
Need to convert MP4 to M4A right now? Drop your file and get results in seconds. Everything runs in your browser. Your audio never leaves your device.
Drop your MP4 file here or click to browse
MP4 (.mp4) · Max 20 MB
AudioUtils converts MP4 to M4A using WebAssembly. The entire process happens locally. No upload, no server, no waiting in a queue.
Open any browser. Pick your file. Click convert. The M4A file downloads instantly. Works on any device with a modern browser.
Both MP4 and M4A are lossy formats. Each re-encode can degrade quality slightly. Convert once and keep the result. Free tier handles input files up to 20MB file size limit with a 10-second preview output. Upgrade to Pro for unlimited, full-length conversions up to 500MB file size limit.
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.