Convert MP3 to OPUS
MP3 is great for sharing music, podcasts and ringtones that play on every device, but OPUS is the better choice for voice messages, calls and streaming at low bitrates. Convert MP3 to OPUS in seconds, right in your browser.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Keep this tab open — the conversion runs on your device, nothing is uploaded.
Add more files above to keep converting.
How to convert MP3 to OPUS
- 1
Tap Choose files and select one or more MP3 files (or drag them in).
- 2
Check that OPUS is selected. Use Advanced options for bitrate, channels or trimming.
- 3
Press Convert. Everything happens on your device — no upload, no waiting in a queue.
- 4
Your OPUS downloads automatically. Converting several files? Grab them all as a ZIP.
MP3 vs OPUS
Both formats are lossy, so the audio is re-encoded once. Pick High quality to keep it as close to the original as possible, or Small for the smallest file.
| MP3 | OPUS | |
|---|---|---|
| Full name | MPEG-1 Audio Layer III | Opus Audio |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Developed by | Fraunhofer IIS | IETF / Xiph.Org |
| Introduced | 1993 | 2012 |
| Plays on iPhone | ✓ Yes | ◐ Partly / with an app |
| Plays on Android | ✓ Yes | ✓ Yes |
| Plays on Windows | ✓ Yes | ✓ Yes |
| Plays on Mac | ✓ Yes | ✓ Yes |
About MP3 and OPUS
MP3: MP3 is the most widely supported audio format in the world. It uses lossy compression to make music and voice files small enough to share, while keeping quality good enough for everyday listening.
OPUS: Opus is a modern, highly efficient codec used by WhatsApp voice notes, Discord, Zoom and WebRTC calls. It sounds excellent even at very low bitrates.
Frequently asked questions
How do I convert MP3 to OPUS on my phone?
Will converting MP3 to OPUS reduce quality?
Is this MP3 to OPUS converter free?
Are my files uploaded to a server?
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