MP4 video → M4A / AAC
Convert MP4 video to M4A / AAC
Convert MP4 video (.mp4) to M4A / AAC (.m4a) right in your browser. Free and unlimited. Your files never leave your device.
Drop a file, or click to browse
Drop a file anywhere, click to browse, or paste an image. Files never leave your device.
Extracts the audio track; the video is discarded.
Extracting the audio from a MP4 video
This keeps the sound from your MP4 video and drops the picture, saving it as M4A / AAC. Morphr decodes the audio track and re-encodes it in your browser — handy when you only want the song, talk or podcast, not the video.
MP4 video and M4A / AAC, explained
MP4 is the video container almost everything can play, from phones to TVs to upload forms. Its H.264 video is the safe default when you just need a file to work everywhere. M4A (AAC) is the lossy audio format used by Apple Music and iTunes, generally better than MP3 at the same bitrate.
Good to know
- Your MP4 video files never leave your device — everything converts locally in the browser, so even confidential ones stay private.
- Convert as many MP4 video files as you like at once; a batch comes back as a single ZIP.
- Everything runs in your browser, so large videos take longer and need enough free memory.
- No sign-up, no watermark and no size limit beyond your device’s memory.
The private way to turn MP4 video into M4A / AAC
With Morphr, the whole conversion runs inside your browser tab using your browser's built-in decoder, so your file is never uploaded to a server, queued, or stored. That makes it a safe choice for personal photos, scanned documents and anything you'd rather not hand to a third party.
New to these formats? Read the guides on MP4 video and M4A / AAC.
Frequently asked questions
- How do I convert MP4 video to M4A / AAC?
- Drop your MP4 video file onto the converter above (or click to browse), and Morphr converts it to M4A / AAC right in your browser. When it's done, click download — there's nothing to install and no account to create.
- What do I get converting MP4 video to M4A / AAC?
- A single still frame, saved as M4A / AAC. Morphr extracts the frame in your browser — it doesn't re-encode the video, so the audio and motion aren't included, just the picture.
- Are my files uploaded to a server?
- No. The conversion runs entirely in your browser, so your MP4 video file never leaves your device.