Convert AMR to OPUS
AMR is great for call recordings and voice memos from older phones, but OPUS is the better choice for voice messages, calls and streaming at low bitrates. Convert AMR 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 AMR to OPUS
- 1
Tap Choose files and select one or more AMR 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.
AMR 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.
| AMR | OPUS | |
|---|---|---|
| Full name | Adaptive Multi-Rate | Opus Audio |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Developed by | 3GPP / Ericsson | IETF / Xiph.Org |
| Introduced | 1999 | 2012 |
| Plays on iPhone | ✕ No | ◐ Partly / with an app |
| Plays on Android | ✓ Yes | ✓ Yes |
| Plays on Windows | ◐ Partly / with an app | ✓ Yes |
| Plays on Mac | ✕ No | ✓ Yes |
About AMR and OPUS
AMR: AMR is a speech codec made for mobile phones. Older Android and Nokia phones, call recorders and voice-memo apps save recordings as .amr files, which many computers cannot open.
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 AMR to OPUS on my phone?
Will converting AMR to OPUS reduce quality?
Is this AMR to OPUS converter free?
Are my files uploaded to a server?
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