What is M4A?
M4A is Apple's AAC audio format. It is what iPhone Voice Memos, GarageBand exports and many podcast downloads use.
All tools
M4A to MP4 converter
Convert M4A to MP4 for free, right in your browser. Drop a file, wait a few seconds and download. Share a voice memo or audio clip on platforms that only accept video.
M4A to MP4 Converter
Convert M4A to MP4 right in your browser. Files never leave your device, so there is no upload wait and no size queue.
Optional cover image
Shown for the whole video. Leave empty for a black frame.
Drop your M4A file or tap to choose
Up to 1 GB. Converted on your device.
Tool details
How to convert M4A to MP4
- 01
Drop your M4A file
Drag it onto the box or tap to pick it from your device.
- 02
Let it convert
Your browser decodes the audio and re-encodes it. A progress bar shows how far along it is.
- 03
Download the MP4
Preview it on the page, then download the new file with the same name as the original.
About this tool
Why convert to MP4?
An MP4 with a still image lets you upload audio to YouTube, TikTok or Instagram, which only accept video files.
Private by design
Most online converters upload your file to their servers. This one does the work locally, so recordings of meetings, interviews or unreleased music never leave your computer or phone.
Frequently asked questions
Can I post a voice memo on Instagram or TikTok?
Yes, once it is a video. Convert the M4A to MP4 here, add a cover image, and upload it like any other clip.
Is the audio re-encoded?
The audio is encoded as AAC at 192 kbps inside the MP4, which keeps speech and music sounding clean.
Is my M4A file uploaded anywhere?
No. The conversion runs inside your browser on your own device. Your file is never sent to FacelessGenie or any server, which also means there is no upload wait.
Is there a file size limit?
You can convert files up to 1 GB. Very long files take longer because your device does the work, but the page shows progress while it runs.
Which browsers work?
Recent versions of Chrome, Edge and Safari handle every format here. Firefox works for most audio files. If a file will not open, try Chrome or Edge, which support the widest range of MP4 encoding.