Audio
Turn your M4A files into FLAC in seconds. Everything happens in your browser: nothing is uploaded to any server.
Drag your files here
Or paste them with Ctrl+V. They never leave your device.
Some old players or editing programs only accept MP3 or WAV. As FLAC it is stored losslessly and much smaller than a WAV.
M4A is AAC audio in an MP4 container: the format of iTunes, iPhone voice memos and many podcasts.
Strengths: Good quality at a small size, with tags and artwork, and it opens on Apple, Android and Windows.
Limits: Some old players or editing programs only accept MP3 or WAV.
FLAC compresses audio without losing anything: it plays back exactly like the original.
Strengths: Ideal for archiving music at CD quality or better in about half the size of a WAV.
Limits: It weighs several times more than an MP3 and some simple devices do not play it.
No. The M4A to FLAC conversion runs entirely in your browser, with code downloaded from this site and executed on your device. You can check it in the Network tab of the developer tools or by going offline after the page loads.
No: FLAC stores audio losslessly (any loss already in the M4A cannot be recovered).
Up to 2 GB on desktop and 500 MB on mobile (less on low-memory devices), and up to 12 hours of audio on desktop. If it is over, you are told before it starts.
Yes. Drop as many M4A files as you like: several are converted at the same time, depending on your processor cores, and when they finish you can download each FLAC or all of them in a ZIP.