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Convert OPUS to M4A
Most music players, car stereos and editors cannot open the .opus voice notes saved from WhatsApp. M4A (AAC) sounds better than MP3 at the same size and plays natively on Apple devices.
- Free
- No sign-up
- Batch conversion
Why convert OPUS to M4A?
To convert OPUS files to M4A, drop them on the counter above.
Most files convert in seconds: no queue, no email address, and the M4A result saves straight to your computer or phone.
How to convert OPUS to M4A
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Add your OPUS files
Drag your OPUS files onto the counter or pick them with Choose files. You can add several at once.
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Check the settings
The defaults suit most cases. Change quality, size or other options if you like; after a change, one click converts again.
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Conversion starts by itself
Each file is converted to M4A and its row is stamped CONVERTED.
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Download your M4A file
Get the file with Download. With several files you can download them all as one ZIP.
OPUS vs M4A
| Property | OPUS | M4A |
|---|---|---|
| Full name | Opus Interactive Audio Codec | MPEG-4 Audio |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Created by | IETF (RFC 6716) | MPEG; Apple yaygınlaştırdı |
| Year | 2012 | — |
| Extensions | .opus | .m4a .m4b |
| MIME | audio/opus | audio/mp4 |
About the formats
OPUS
Opus Interactive Audio Codec
Opus is an open audio codec for speech and music with very low latency. WhatsApp voice notes are saved as .opus files.
M4A
MPEG-4 Audio
M4A is an MPEG-4 container that usually carries AAC audio. iPhone voice memos, iTunes music and many saved voice clips are M4A.
Frequently asked questions
Is converting OPUS to M4A free?
Yes, completely free. No account, no daily limit, no watermark and no queue.
Does it work on a phone?
Yes. It works on iPhone, iPad and Android, with no app to install.
Is there a file size limit?
There is no size limit set by us. Files of hundreds of MB convert too; very large files take longer and are handled more comfortably on a computer than on a phone.
Other conversions
| Family | Give | → | Get | What you gain |
|---|---|---|---|---|
| M4A | OPUS | most efficient for speech | ||
| OPUS | MP3 | plays on every device | ||
| OPUS | WAV | lossless, ready to edit · larger file | ||
| OPUS | AAC | broadcast-grade audio | ||
| OPUS | OGG | open and royalty-free | ||
| OPUS | FLAC | lossless at half size · larger file | ||
| MP3 | M4A | better than MP3 at the same size · MP3 recording | ||
| WAV | M4A | better than MP3 at the same size · studio recording | ||
| MP4 | M4A | sound only, better than MP3 at the same size | ||
| AAC | M4A | better than MP3 at the same size · raw AAC stream | ||
| OGG | M4A | better than MP3 at the same size · Telegram voice message | ||
| FLAC | M4A | better than MP3 at the same size · lossless archive |