NCM to M4R Converter
NCM is converted locally to an M4R ringtone trimmed near 40 seconds, ready to import into iPhone. Conversion happens privately in-browser.
About NCM
NetEase Cloud Music proprietary format
NCM is the proprietary cache format used by NetEase Cloud Music and cannot be played directly. This tool converts it in your browser to MP3 or FLAC.
- Auto-converts to common formats
- Proprietary format, must be converted first
About M4R
iPhone ringtone format
M4R is the ringtone format used by iPhone, essentially AAC audio limited to around 40 seconds, suited for creating custom ringtones.
- Usable directly as an iPhone ringtone
- Length-limited and single-purpose
NCM to M4R FAQ
Will converting NCM to M4R lose quality?
Both NCM and M4R are lossy formats. Re-compression may further reduce quality — choose a higher bitrate to minimize additional loss.
Will the file size change after conversion?
Converting to a lossless format (WAV) usually increases size, while converting to a lossy format (MP3, AAC) usually decreases it, depending on the chosen bitrate and sample rate.
How do I batch convert NCM to M4R?
Just drop multiple NCM files in; they are converted to M4R one by one via a queue. You can download them individually or as a single ZIP.