OPUS to M4A
Convert OPUS files to M4A in seconds, for free. Nothing to install.
Files are deleted from the server automatically after 1 h.
Why convert OPUS to M4A?
- M4A is the native audio format of iPhone and Apple Music — good quality at a small size.
- Convert in a few seconds right in your browser, without installing software.
You don't need to install any software to convert OPUS to M4A. Upload your file, choose M4A and download the result a few seconds later. The conversion runs on our servers and your file is deleted automatically after 1 h.
OPUS vs M4A: comparison
| Feature | OPUSOpus Audio | M4AMPEG-4 Audio (AAC) |
|---|---|---|
| Developer | Xiph.Org / IETF | Apple / MPEG |
| Released | 2012 | 2003 |
| Type | audio | audio |
| Compression | lossy | lossy |
| Opens with | VLC, Chrome, Firefox, Telegram, WhatsApp | iTunes / Apple Music, VLC, Windows Media Player |
Tip: choose the bitrate. 128 kbps is enough for speech; 320 kbps is the best quality for music.
How it works
- Choose or drop your OPUS file.
- Pick M4A as the output format.
- Click “Convert” and download your file.
OPUS to M4A: questions and answers
Will quality be lost when converting OPUS to M4A?
M4A uses compression, but at the default settings the difference is hard to hear or see. You can choose a higher bitrate in Options.
How long does OPUS to M4A conversion take?
It depends on the length: a short file takes a few seconds, a long video can take a few minutes. Progress is shown as a percentage.
What is the maximum OPUS file size?
Up to 200 MB per file and up to 20 files at once — for free.
Can I convert OPUS to M4A on my phone?
Yes. TezConvert works in any browser on Android and iPhone — no app needed.
How do I open a M4A file?
M4A files open in: iTunes / Apple Music, VLC, Windows Media Player.
Are my files safe?
Files are used only for the conversion, never shown to anyone, and deleted automatically after 1 h. The original is deleted right after conversion.
⇄ Need the opposite? Convert M4A to OPUS →