MP4 – MPEG-4 Part 14
MP4 is the most widely supported video container. It usually holds H.264 or H.265 video with AAC audio and plays on nearly every phone, computer, TV and browser.
More MP4 conversionsDrop your MP4 files here
or click to choose MP4 files · up to 95MB each
How to convert MP4 to M4A
- Choose your files. Click Select File or drag your MP4 files into the upload box. You can add many at once.
- Pick the settings. M4A is already selected as the output format. The conversion starts as soon as a file is added.
- Download. Each file appears in the list when it is ready. Download them one by one, or all together with Download all.
Why convert MP4 to M4A?
M4A is the audio format of iPhones, iTunes and Apple Music. Extracting the sound of an MP4 as M4A gives you a small, good-quality file that works well on Apple devices and as a ringtone source.
When to keep the MP4
Keep the MP4 if you still need the video: the M4A holds only the sound, and the picture cannot be added back.
Tips for the best result
- The audio is encoded as AAC at 192 kbps.
- M4A files are usually smaller than MP3 at similar quality.
- Use MP4 to MP3 if the file must play on very old players.
Common problems and fixes
- It says there is no audio track.
- The video has no sound.
- An old player will not play the M4A.
- Some very old devices only play MP3. Use MP4 to MP3 for those.
M4A – MPEG-4 Audio
M4A is an MP4 container for audio, normally AAC. It is the default audio format for iTunes, iPhone voice memos and many podcasts.
More M4A conversionsConverting MP4 to M4A
- Extracts the audio track.
Frequently asked questions
What is the difference between M4A and MP3?
Both are compressed audio. M4A uses AAC, which sounds a little better than MP3 at the same size.
Can I make an iPhone ringtone from it?
Ringtones use the M4R format, which is AAC like M4A. Rename the file to .m4r and shorten it to 30 seconds in an editor.
How do I convert MP4 to M4A?
Click Select File or drop your MP4 file onto the upload box. The converted M4A appears in the list below with a download button. You can add many files at once and download them together as a ZIP.
Is it really free?
Yes. There is no sign-up and no watermark. To keep the service available for everyone there is a 95MB limit per file and a cap on how many files one connection can process in a short period.
Are my files stored?
Your upload is used only to make the converted file. Images are processed in memory; other files are written to a private temporary folder that is deleted as soon as the conversion finishes. Nothing is kept after the result has been sent back.
Will quality drop?
For images, a little, by design: the image is re-encoded at the Quality you choose (default 75%). Audio and video are re-encoded with high-quality settings; documents keep their text and layout as far as the target format allows. Converting never restores detail that is already missing from the original.
How this works: your file is uploaded over HTTPS and converted on this server with open-source engines (libvips for images, FFmpeg for audio and video, LibreOffice and Pandoc for documents, Calibre for ebooks, Ghostscript and Inkscape for PDF and vector files). Images are processed in memory; other files use a private temporary folder that is deleted as soon as the conversion finishes.