What happens when you convert M4A to Opus
| Compression | Lossy → Lossy |
|---|---|
| Size per minute | M4A ≈ 1.4 MB → Opus ≈ 1.4 MB at 192 kbps |
| Quality | Re-encoded once more; at 192 kbps or higher the extra loss is very hard to hear |
| Tags | Title, artist and album tags are copied when the target format supports them |
| Opens in | browsers, Android, WhatsApp and Discord; older players do not |
Sizes are typical values; your files will vary with content and settings.
M4A MPEG-4 Audio
M4A is an MPEG-4 container holding AAC audio. iPhone voice memos, iTunes purchases and many recorders save M4A, and it sounds better than MP3 at the same bitrate.
M4A converterOpus Opus Interactive Audio
Opus is a modern open codec that outperforms MP3 and AAC at low bitrates. WhatsApp voice notes, Discord and WebRTC calls all use Opus.
Opus converterHow to use the M4A to Opus Converter
- 1
Choose a M4A file or drop it onto the page.
- 2
Review the audio options. The defaults suit most files.
- 3
Click Convert and download your Opus when processing finishes.
Why convert M4A to Opus?
M4A files come from iPhone Voice Memos, iTunes purchases and many Android recorder apps. Some older players, car stereos and upload forms only accept MP3. Choose Opus for voice recordings and low bitrates, where it sounds better than MP3 or AAC at the same size.
Frequently asked questions
Will the Opus lose quality?
Both formats are lossy, so converting re-encodes the data once more. Using a high quality setting keeps the generational loss very small. Avoid converting the same file back and forth repeatedly.
Will the Opus be smaller than the M4A?
About the same: a minute of audio takes about 1.4 MB as M4A and about 1.4 MB as Opus at 192 kbps. Lower the bitrate to shrink it further; 128 kbps is plenty for speech.
Questions about privacy, file-size limits or conversion speed are answered in the general FAQ.