Bulk PCM to M4R Converter Online — Free HD Quality
Drag and drop your multiple PCM files into this 100% free online PCM to M4R converter (.pcm 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 PCM files are removed from our servers right after. Also see:Convert multiple OPUS to AAC.
Drop your PCM files here to convert to M4R, or click to browse
Converts .pcm to M4R (.m4r) in HD quality — bulk, free, no signup
Choose FilesPCM vs M4R — File Format Comparison
See how PCM and M4R compare across file extension, MIME type, compression, and feature support. Related:Convert multiple PCM to AIFC at once.
| Feature | PCM | M4R |
|---|---|---|
| File Extension | .pcm | .m4r |
| MIME Type | audio/x-raw | audio/mp4 |
| Compression Type | Lossless | Lossy |
| Metadata Support | No | Yes |
What Is PCM Format?
Raw PCM Audio — headerless binary audio data containing uncompressed pulse-code modulation samples with no metadata; typically 44100 Hz stereo 16-bit little-endian, used in low-level audio pipelines and embedded systems. See also:Online PCM to OGA converter tool.
- Compression: Lossless
- Tags & Metadata: Not 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