Convert MP4 to M4A
Extract the audio track of any MP4 as an M4A — the best quality-per-megabyte of the common audio formats.
Free · No signup · Files never leave your device
Drag and drop a video file
or click to browse
Output format
Best quality/size
Other extractions
How it works
Drop your MP4 file
It stays on your device — nothing is uploaded.
Audio extracted locally
The M4A track is extracted right in your browser via WebAssembly — the video stream is skipped, so it's fast.
Download the result
Get your M4A file — free, no watermark.
Frequently asked questions
M4A holds AAC audio — the same codec most MP4 videos already use — so extraction is often a clean repackage of the original track. At the same file size, AAC sounds better than MP3, and M4A plays natively on Apple devices, Android, and every modern browser.
Usually well under a minute. Only the audio track is decoded and re-encoded — the video stream is skipped entirely, so even long videos process quickly right in your browser.
The audio is extracted directly from the video file, so you get exactly what the video contains. MP3 and M4A re-encode at a high bitrate that is indistinguishable for speech and music; WAV is fully uncompressed.
Yes. The audio extractor is completely free, with no signup, watermarks, or limits. We make money from our video translation service, not from this tool.
No. The extraction happens locally in your browser using WebAssembly. Your file never leaves your device — you can even disconnect from the internet once the page has loaded.
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