MP4 to M4A Converter
Extract the audio from an MP4 video and save it as M4A — right in your browser.
MP4 videos usually carry AAC audio, and M4A is the natural audio-only home for that same codec — efficient, high quality, and well supported across Apple devices and music apps.
This tool extracts the audio from your MP4 and saves it as M4A locally, with no upload.
How to convert MP4 to M4A
- 1Drop your MP4 file into the area above — or click to browse.
- 2The output format is already set to M4A. Adjust the quality settings if the format supports them.
- 3Click convert, then download your M4A file. Everything runs locally — nothing is uploaded.
Frequently asked questions
M4A (AAC) is generally more efficient than MP3, giving similar or better quality at the same bitrate. MP3 still wins on universal compatibility.
The audio is re-encoded to AAC. Choosing a higher bitrate keeps quality close to the original MP4 soundtrack.
No. All processing happens entirely in your browser. Your data never leaves your device — nothing is uploaded to any server.
Yes. Once the page has loaded, the tool works completely offline. For the best experience, install PrivaDeck as a PWA from your browser.
Other conversions
Need a different format?
Open the full audio converter to pick from MP3, WAV, OGG, AAC, FLAC, M4A and Opus, convert in batches, and adjust bitrate, sample rate and channels.
Open the full Audio Converter