OPUS vs AMR — Comparison & Free Converter
Fast, instant OPUS to AMR conversion. No signup required. Just drop your .opus file and get .amr in seconds.
Batch Settings
Some metadata may not survive
Your OPUS file may contain Ogg tags, Vorbis comments metadata. AMR has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
Default format on Discord
Your device saves files in OPUS by default (Discord, WebRTC calls, WhatsApp calls). Most people convert because the files won't open on other devices — AMR is universally supported and will work everywhere.
What compression artifacts to expect
AMR lossy compression can produce heavy distortion, narrow bandwidth (speech only). At the high quality settings CocoConvert uses by default, these are usually invisible to the eye. Lower quality settings trade visual fidelity for smaller file sizes.
您是否曾遇到这样的情况：手头有一个OPUS格式的音频文件，想在旧款手机上播放，或是需要通过某些即时通讯工具分享，却发现兼容性不佳？OPUS以其出色的压缩效率和音质，在网络语音通话和流媒体中表现出色。然而，在一些特定场景，尤其是面对年代较久的设备或某些地域性较强的应用时，AMR格式往往能提供更好的通用性。AMR，全称Adaptive Multi-Rate，虽然音质和压缩比略逊于OPUS，但其在早期移动通信领域的广泛应用，使其成为许多老旧设备和特定平台上的“通行证”。本页面将引导您轻松将OPUS音频转换为AMR格式，让您的音频文件在更多设备和平台间畅行无阻。
- 微信语音转发
- 旧款功能机播放
- 车载系统兼容
在中国大陆及东南亚地区，AMR格式因其在早期移动网络和部分本地化应用中的普及，至今仍是许多用户在分享语音信息时，尤其是需确保最大兼容性时的常见选择。
About OPUS to AMR Conversion
OPUS or AMR — which format should you use? The answer depends on your needs. Here's a quick breakdown.
Opus is a versatile open codec excelling at both speech and music, used in WebRTC and Discord. It has limited platform support. AMR is a speech-optimised audio codec used in mobile voice recordings. It has limited platform support.
Full Name: OPUS uses Opus Audio, while AMR uses Adaptive Multi-Rate Audio. Compression: OPUS uses Lossy, while AMR uses Lossy. Typical File Size: OPUS uses 0.5–1 MB per minute at 96 kbps (near-transparent quality), while AMR uses 0.1 MB per minute (extremely compressed).
So when should you convert OPUS to AMR? This conversion is ideal when you Your OPUS file won't open on a recipient's device or in an application, or when you A website, service, or platform only accepts AMR uploads. This conversion helps you improve file compatibility across devices.
Your device saves files in OPUS by default (Discord, WebRTC calls, WhatsApp calls). Most people convert because the files won't open on other devices — AMR is universally supported and will work everywhere. Common misconception: ""I'll convert to AMR and then back to OPUS — it'll be the same"" — in reality, each lossy conversion cycle permanently degrades quality. going opus → amr → opus will produce a noticeably worse file than the original. always keep your source file.
If you've decided AMR is the right choice, CocoConvert makes the conversion effortless. Upload your .opus file, pick AMR, and click Convert — done in seconds. The converter runs on secure servers in Germany, powered by FFmpeg, Sharp, and qpdf. Files are encrypted via TLS and erased within 24 hours.
Free tier: 5 files/hour, 250 MB each. Pro: 100 files/hour, 5 GB each. Works in every modern browser on desktop and mobile.
How to Convert OPUS to AMR
- 1
Choose your OPUS file
Upload your .opus file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to AMR
Select .amr from the output options. The converter applies optimal quality settings automatically.
- 3
Run the conversion
Click Convert. Server-side processing means your device stays fast — even for large audio files.
- 4
Get your AMR file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert OPUS to AMR
Your OPUS audio is decoded into raw PCM samples, then re-encoded as AMR. Some audio data is permanently discarded during compression.
Your OPUS file is decoded — compressed audio becomes raw PCM waveform data
The raw audio is re-encoded using Adaptive Multi-Rate Audio's lossy codec
Metadata (tags, artwork, track info) is transferred where AMR supports it
The AMR file is saved and ready for download
OPUS vs AMR — Detailed Comparison
| Feature | .OPUS | .AMR |
|---|---|---|
| Full Name | Opus Audio | Adaptive Multi-Rate Audio |
| Compression | Lossy | Lossy |
| Typical File Size | 0.5–1 MB per minute at 96 kbps (near-transparent quality) | 0.1 MB per minute (extremely compressed) |
| Platform Support | Limited | Limited |
| Browser Support | modern browsers | none |
| Year Created | 2012 | 1999 |
| Open Standard | Yes | Yes |
Should You Convert OPUS to AMR?
When to Convert
- ✓Your OPUS file won't open on a recipient's device or in an application
- ✓A website, service, or platform only accepts AMR uploads
- ✓You captured this file on Discord and need to share it with others
When NOT to Convert
- ✗You're converting just because the file "seems old" — re-encoding lossy-to-lossy always degrades quality
Common Mistakes When Converting OPUS to AMR
"I'll convert to AMR and then back to OPUS — it'll be the same"
Each lossy conversion cycle permanently degrades quality. Going OPUS → AMR → OPUS will produce a noticeably worse file than the original. Always keep your source file.
Frequently Asked Questions
Should I use OPUS or AMR?
It depends on your goal. OPUS offers smaller files via lossy compression. AMR offers smaller files via lossy compression. Choose based on whether file size or quality matters more for your use case.
Is AMR higher quality than OPUS?
Not necessarily. Your device saves files in OPUS by default (Discord, WebRTC calls, WhatsApp calls). Most people convert because the files won't open on other devices — AMR is universally supported and will work everywhere. Quality depends on the compression type and settings, not just the format name.
Can I convert OPUS to AMR on Mac and Windows?
Yes. CocoConvert is a web-based tool that works in all modern browsers — Chrome, Safari, Firefox, Edge — on any operating system including macOS, Windows, Linux, iOS, and Android.
Is CocoConvert free for OPUS to AMR?
Yes. Free users get 5 conversions per hour (250 MB each). Pro subscribers unlock 100 files per hour, 5 GB per file, and priority processing.
What tools does CocoConvert use for OPUS to AMR?
CocoConvert uses FFmpeg for audio/video, Sharp for images, and qpdf for documents — the same open-source libraries used by Netflix, YouTube, and major enterprise platforms.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.