M4A to OPUS
Convert M4A files to OPUS in seconds, for free. Nothing to install.
Files are deleted from the server automatically after 1 h.
Why convert M4A to OPUS?
- Opus gives the best sound at low bitrates — it is the codec behind voice messages in WhatsApp, Telegram and Discord.
- Convert in a few seconds right in your browser, without installing software.
You don't need to install any software to convert M4A to OPUS. Upload your file, choose OPUS and download the result a few seconds later. The conversion runs on our servers and your file is deleted automatically after 1 h.
M4A vs OPUS: comparison
| Feature | M4AMPEG-4 Audio (AAC) | OPUSOpus Audio |
|---|---|---|
| Developer | Apple / MPEG | Xiph.Org / IETF |
| Released | 2003 | 2012 |
| Type | audio | audio |
| Compression | lossy | lossy |
| Opens with | iTunes / Apple Music, VLC, Windows Media Player | VLC, Chrome, Firefox, Telegram, WhatsApp |
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 M4A file.
- Pick OPUS as the output format.
- Click “Convert” and download your file.
M4A to OPUS: questions and answers
Will quality be lost when converting M4A to OPUS?
OPUS 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 M4A to OPUS 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 M4A file size?
Up to 200 MB per file and up to 20 files at once — for free.
Can I convert M4A to OPUS on my phone?
Yes. TezConvert works in any browser on Android and iPhone — no app needed.
How do I open a OPUS file?
OPUS files open in: VLC, Chrome, Firefox, Telegram, WhatsApp.
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 OPUS to M4A →