Bulk M4R to OPUS Converter Online — Free HD Quality
Drag and drop your multiple M4R files into this 100% free online M4R to OPUS converter (.m4r to .opus), and click the Convert button to bulk convert them to OPUS format in HD quality. Use the quality slider to fine-tune your OPUS output, then download your converted files one by one or as a single ZIP — no signup and no downloads needed, and your original M4R files are removed from our servers right after. Also see:MP3 to CAF converter.
Drop your M4R files here to convert to OPUS, or click to browse
Converts .m4r to OPUS (.opus) in HD quality — bulk, free, no signup
Choose FilesM4R vs OPUS — File Format Comparison
See how M4R and OPUS compare across file extension, MIME type, compression, and feature support. Related:Easy M4B to Android Audio converter.
| Feature | M4R | OPUS |
|---|---|---|
| File Extension | .m4r | .opus |
| MIME Type | audio/mp4 | audio/opus |
| Compression Type | Lossy | Lossy |
| Metadata Support | Yes | Yes |
What Is M4R Format?
iPhone Ringtone — AAC audio in an MP4 container under 40 seconds, the format iTunes and iPhone use for custom ringtones; identical to M4A in encoding but recognised by iOS as a ringtone file.
- Compression: Lossy
- Tags & Metadata: Supported
What Is OPUS Format?
Opus — the IETF standard for internet voice and music streaming; outperforms MP3, AAC, and Vorbis at every bitrate, and is the default codec for WebRTC, Discord, and Spotify Connect.
- Compression: Lossy
- Tags & Metadata: Supported