Turn M4A (M4A Audio) files into MP3 (MP3 Audio) — in your browser, no install, no quality loss.
Convert nowM4A goes straight to MP3, with no intermediate format to degrade it along the way.
The work is done by ffmpeg.
M4a maps to mp3 in a single step. Handled by ffmpeg.
For members, files live only in your own company drive and no other company can see them. As a guest, everything is deleted after 24 hours. Retention varies by plan and you can delete anything yourself at any time.
Yes. Drop in as many as you like — we show only the targets every file can reach, then convert them together.
No, it runs in your browser. A Windows build exists but is optional; it adds watched folders and an Explorer right-click menu.
You can try it without signing up, and free members get a set number of conversions each month. Larger files or higher volume need a paid plan.
Yes. Open it in Safari or Chrome on your Mac — there is nothing to install.
Yes. It opens straight from omnidesk.win and runs in Chrome, Edge, Safari or Firefox — nothing to install.
Yes. Open it in Chrome or Samsung Internet on your phone and pick the file — no app needed.
Use it in the browser, or install the Windows desktop app if you do this often — it uses the same account and can process files you drop into a chosen folder.