AMR to OPUS converter
Convert AMR to OPUS in seconds, free and unlimited. No upload, no sign-up, no watermark: your audio never leaves your device.
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Quick answer: To convert AMR to OPUS, add the AMR file to the iHateFiles AMR to OPUS converter and press Convert. The conversion runs in your browser, so the file is never uploaded, and it is free with no sign-up, watermark or size limit. AMR is a format most software has stopped opening. OPUS is not.
Should you convert AMR to OPUS?
Yes. Very little current software opens AMR, so converting it is the way to keep listening to it. Pick a generous bitrate.
Both AMR and OPUS are lossy
AMR (AMR narrowband speech) has already discarded some of the sound, and OPUS (Opus) will discard a little more. The OPUS encoder works from the AMR, not the original recording, so pick a bitrate at or above the source. A lower one saves space and costs quality you cannot get back.
AMR was made for voices
AMR is a phone-call codec that keeps only the frequencies speech needs, roughly up to 4 kHz. Converting to OPUS makes the recording open everywhere, but it will still sound like a phone call, because the rest of the sound was never recorded.
Where the OPUS will play
OPUS plays on browsers, Android, WhatsApp and Discord, but not many car stereos or older players.
AMR and OPUS side by side
| AMR | OPUS | |
|---|---|---|
| Inside the file | AMR narrowband speech | Opus |
| Compression | Lossy | Lossy |
| Carries sound | Yes | Yes |
| One minute of stereo | about 0.1 MB | 0.25 to 1 MB |
| Plays on | Needs converting first | browsers, Android, WhatsApp and Discord, but not many car stereos or older players |
| Here | Read only | Read and write |
What usually goes wrong
About the AMR. Converting AMR to a high bitrate does not improve it. The frequencies were never recorded.
About the OPUS. Opus at 64 kbps sounds better than MP3 at 128, so the bitrate you are used to is roughly double what you need here.
How to convert AMR to OPUS
- Add your AMR file. It is read from your disk and stays there.
- Check the settings. The output format is already set to OPUS.
- Press convert and the OPUS file is saved back to your device.
Questions
How do I convert AMR to OPUS?
Open this page, add your AMR file, and press convert. The file is decoded and re-encoded by your own browser and saved back to your device. Nothing is uploaded.
Is this AMR to OPUS converter free?
Yes, completely. There is no account, no sign-in, no watermark and no daily limit, because there is no server doing the work. Your own device does it.
Are my files uploaded anywhere?
No. There is no upload endpoint. The conversion runs inside this browser tab, so your file never leaves your device. You can open your browser's network panel and watch: nothing carrying your file is sent.
Is there a file size limit?
No fixed limit. Because the work happens on your machine there is no server quota. The only ceiling is your own device's memory, which for video means very large files may be slow.
Will converting to OPUS lose quality?
OPUS is a lossy format, so some detail is discarded. The quality control on this page decides how much. The default is set high enough that most people cannot see the difference.
Can I convert several AMR files at once?
Yes. Add as many as you like and they are converted one after another, then offered as a single ZIP.