Compress MP4 to M4A
Need smaller audio files? Converting MP4 to M4A dramatically reduces file size. A 50MB file becomes 5MB. Perfect for email, sharing, and storage.
Drop your MP4 file here or click to browse
MP4 (.mp4) · Max 20 MB
MP4 files are already compressed, but M4A can compress further at a different bitrate. The size reduction is significant for sharing, uploading, and storage.
For email attachments, 128-192kbps works well. For music sharing, use 256-320kbps. AudioUtils lets you drop your file and convert instantly. No upload to a server, no waiting.
Both MP4 and M4A are lossy formats. Each re-encode can degrade quality slightly. Convert once and keep the result. Choose the right bitrate for your use case. Higher bitrate means better quality but larger files.
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.