M4A to OPUS

Convert M4A files to OPUS for free. No size limit, no sign-up, nothing uploaded.

How to convert M4A to OPUS

  1. Choose your M4A files or drop them on this page. You can add as many as you like.
  2. OPUS is already selected. Press Convert, or Convert all for several files.
  3. Press Download. With several files you can download them all as one ZIP.

M4A is the audio format of iPhones and iTunes. OPUS is the voice and music format WhatsApp and Telegram use for voice messages.

Questions

Is converting M4A to OPUS free?
Yes. ConvertBoy is free with no daily limit, no watermark and no sign-up.
Is there a file size limit?
No. Your own device does the work, so the only limit is your device's memory. Very large videos take longer on slower computers.
Are my files uploaded anywhere?
No. The conversion happens inside your browser. Your M4A files never leave your device, and nothing is kept after you close the tab.
Does it work on a phone?
Yes. It works in Safari on iPhone and Chrome on Android, as well as on any computer.
How long does it take?
A song takes a few seconds. A video takes roughly as long as it plays on an average laptop, less on a fast one. The first time, the converter loads its video engine (about 30 MB).

Convert M4A to another format

Convert other files to OPUS