How do I turn a voice memo into a video?
Save the memo to Files from Voice Memos (Share → Save to Files), open it here, add captions or a photo, and press Export. Save the result to Photos and post it like any other video.
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Convert M4A to MP4, including iPhone voice memos
Turn a voice memo or any M4A file into a video you can post or send: vertical with big captions, or square or wide with your artwork.
To convert an M4A to MP4, open the M4A above and press Export: the sound goes into an MP4 video with a picture track, which Instagram, TikTok, YouTube and every chat app accept. M4A is already the sound format MP4 uses, so the job is really adding the picture: a moving wave, captions, your title or a photo.
Most M4A files come from an iPhone. Voice Memos saves every recording as M4A, GarageBand shares songs in it, and songs bought from iTunes are AAC files with the same extension. This page opens on Voice note, a vertical design with bouncing dots and large captions that suits a quick spoken thought. For a song, switch to a music visualizer look in Templates.
How to turn a voice memo or M4A into a video
On an iPhone, first save the memo to Files: in Voice Memos, tap the recording, tap the More button, tap **Share**, then **Save to Files**. On a Mac, drag the memo from Voice Memos to the desktop.
Open the M4A
Vertical (9:16) is selected for Stories, Reels and TikTok; pick Square or Landscape for other places. Press Choose an M4A and pick the file from Files, or drop it on the card on a computer.
Choose the part
A memo of 75 seconds or less is used whole. A longer one opens on its liveliest 30 seconds: drag the window on the timeline, or the Clip start and Clip end handles, up to 10 minutes.
Add the words
The Captions panel is open. Press Make captions to write out what you said; the clip’s sound is sent to our speech provider for that and isn’t kept. Tap any line to correct it.
Export the MP4
Press Export, then Export video. On iPhone, press Share and choose Save Video to put it in Photos, or send it straight to an app. On a computer, press Download video.
M4A and MP4: the same family
M4A and MP4 are both MPEG-4 files. The “A” says the file holds audio only, usually AAC. An MP4 holds a video track as well. Renaming .m4a to .mp4 sometimes lets a player open it, but social apps still see a file with no picture and refuse it.
- What the studio adds: an H.264 picture track drawn from your template, wave and captions.
- What happens to the sound: it is decoded and stored as 192 kbps AAC in the MP4. For a voice recording, nothing you could hear is lost.
The MP3 vs MP4 guide explains the formats in more detail, including why an MP4 can be audio only.
Getting M4A files off an iPhone
Voice Memos
Safari can only open files the Files app can see, and Voice Memos keeps its recordings inside the app. Save a copy first: tap the recording, tap the More button, tap Share, then Save to Files, pick a folder and tap Save. The file arrives as .m4a. On a Mac, drag a memo from the Voice Memos window to a Finder window or the desktop.
GarageBand
In My Songs, touch and hold the song, tap Share, then Song, choose the quality and save it to Files. Open that file here.
Songs from the Music app
Tracks you bought from the iTunes Store are ordinary AAC files and can be opened from a computer. Songs streamed or downloaded through an Apple Music subscription are protected and can’t be opened by any other app, this one included.
Making a voice memo worth watching
- Even out the volume in the Audio panel lifts a memo recorded at arm’s length to a steady level. It is worth leaving on for speech.
- Fade in and Fade out soften the click at the start and the fumble for the stop button at the end.
- Captions do most of the work in a feed, where most people watch muted. Pop shows a few big words at a time; Highlight lights them up in full lines.
- Add a photo of yourself as Cover art under Text, and your name in Show or speaker, so viewers know who is talking.
Posting it as a Story or a Reel? The Instagram audio guide covers what Instagram does and doesn’t let you upload, and podcast clips has tips on choosing a strong 30 seconds.
M4A to MP4: frequently asked questions
Can I convert M4A to MP4 by renaming the file?
Sometimes a player accepts it, but the file still has no picture track, so Instagram, TikTok and YouTube won’t take it. Converting adds a real video track.
Does converting M4A to MP4 lose quality?
The sound is re-encoded as 192 kbps AAC, the same kind of sound most M4A files already hold. For voice memos and most music, you won’t hear a difference.
Can I convert M4A to MP4 on an iPhone without an app?
Yes. This page works in Safari on iPhone. Save the M4A to Files, choose it here, export, then press Share and save the video to Photos.
Why can’t I open a song from Apple Music?
Songs from an Apple Music subscription are protected by copy protection and can’t be read by other apps. Songs you bought from the iTunes Store, or your own recordings, open normally.
Is my voice memo uploaded?
The memo itself stays on your phone or computer. If you press Make captions, the sound of the selected clip is sent to our speech-recognition provider to be written out, and nobody keeps it. Without captions, nothing leaves your device.
Can I record a new memo here?
No. This tool starts from a recording you already have. Record in Voice Memos or another app first, then open the file.