Bulk OPUS to M4R Converter Online — Free HD Quality
Drag and drop your multiple OPUS files into this 100% free online OPUS to M4R converter (.opus to .m4r), and click the Convert button to bulk convert them to M4R format in HD quality. Use the quality slider to fine-tune your M4R output, then download your converted files one by one or as a single ZIP — no signup and no downloads needed, and your original OPUS files are removed from our servers right after. Also see:Bulk M4A to M4R tool.
Drop your OPUS files here to convert to M4R, or click to browse
Converts .opus to M4R (.m4r) in HD quality — bulk, free, no signup
Choose FilesOPUS vs M4R — File Format Comparison
See how OPUS and M4R compare across file extension, MIME type, compression, and feature support. Related:Convert OPUS to AIFC free.
| Feature | OPUS | M4R |
|---|---|---|
| File Extension | .opus | .m4r |
| MIME Type | audio/opus | audio/mp4 |
| Compression Type | Lossy | Lossy |
| Metadata Support | Yes | Yes |
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
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