M4A to MP4
Turn an M4A into an MP4 video with a picture, for YouTube, Instagram, or anywhere that wants video. Processing stays on your device.
Drop an M4A
Then add a picture or a color, and bars that move with the sound if you like. Nothing is uploaded.
MP3, M4A, WAV, FLAC, and other audio, or a video with sound.
How to convert M4A to MP4 online
Open an M4A, such as a voice memo, iTunes song, or GarageBand export, add a picture or background color, and save an MP4. The AAC sound inside an M4A is copied into the MP4 without re-encoding, so it keeps its quality, and the file is never uploaded.
Step 1
Choose your M4APick a file or drop it into the converter above.Step 2
Add a pictureAdd an image or pick a background color.Step 3
Download the MP4Save the video when it finishes.
What to expect
- Supported inputs
- M4A files, and any other audio or video with sound this browser can read. Pictures can be PNG, JPEG, or WebP.
- What happens
- The sound plays over a still picture for its full length. AAC audio is copied without re-encoding; other audio is encoded as AAC, or MP3 where the browser has no AAC encoder.
- Limits
- One sound file at a time. The picture stays the same for the whole video; use Add audio to video to put a song under moving footage.
Private by design
Your video stays on your device
Mastershot processes your file locally in this browser. It does not need to be uploaded to a server, and you do not need an account to use the tool.
- No upload
- No signup
- No watermark
Questions
Both use the same container. An M4A holds only sound; an MP4 usually holds video too. Adding a picture makes a video that sites like YouTube accept.
No. An M4A's AAC audio is copied as it is, so the MP4 sounds exactly the same.
Share the memo from the Voice Memos app to Files, open it here, add a picture, and save the MP4.