FormatDrop
Audio Format

M4R

iPhone Ringtone

M4R is the iPhone ringtone format. Technically it's identical to M4A — AAC audio in an MPEG-4 container — but iOS recognizes the .m4r extension as a ringtone and adds the file to the iPhone's Ringtone library. Same audio inside, different routing in the operating system.

What is M4R?

M4R files use the same MPEG-4 (ISO BMFF) container as M4A and MP4, with AAC audio inside. The only structural requirement is the .m4r extension. iOS 9+ accepts ringtones up to 30 seconds; longer M4R files sync but won't appear in the ringtone selection screen. Apple originally designed M4R for paid ringtones in iTunes Store; the format remains the standard for sideloaded custom ringtones.

M4R pros and cons

Advantages

  • Native iOS ringtone format — no conversion needed at install
  • AAC compression delivers better quality than MP3 at low bitrates
  • Compatible with all iPhone models from iPhone 1 onward
  • Tightly integrated with iTunes/Finder sync
  • Works for text tones and alerts (not just calls)

Limitations

  • iOS-only format — Android phones don't recognize .m4r natively
  • 30-second limit for ringtone use
  • Requires Mac (Finder) or Windows (iTunes) to install on iPhone
  • Custom ringtones don't sync via iCloud — must use cable sync

When should you convert M4R files?

Convert M4R to MP3 for use as a ringtone on Android, web embedding, or general audio playback: `ffmpeg -i input.m4r -c:a libmp3lame -b:a 192k output.mp3`. Convert MP3 to M4R for creating iPhone ringtones: `ffmpeg -i input.mp3 -ss 0 -t 30 -c:a aac -b:a 256k output.m4r`.

Convert M4R files

AUDIO-CONVERTER→

All FormatDrop conversions run entirely in your browser — no file upload, no server processing. Your files stay on your device.

M4R FAQ

How do I install an M4R ringtone on my iPhone?
Mac: connect iPhone, drag the .m4r file to your iPhone's icon in Finder. The ringtone appears in Settings → Sound → Ringtone. Windows: use iTunes, drag the .m4r to the Tones section, then sync. Or use a third-party iPhone manager like iMazing.
Why is my M4R not appearing as a ringtone?
Three common causes: (1) longer than 30 seconds — trim shorter; (2) wrong codec — must be AAC, not MP3 or ALAC; (3) sync didn't complete — disconnect/reconnect and re-sync.
Can I create M4R directly on iPhone without a computer?
Yes — apps like GarageBand for iOS, Ringtone Maker, or Ringtone Designer Pro can create custom ringtones from your music library, voice memos, or imported audio. The app saves them directly to the ringtone library without computer sync.

More formats

HEICWebPAVIFEPUBWebMOpusMP3WAVM4AFLACAACMP4AVIMKVMOVJPGPNGGIFSVGTIFFICOBMPEPSARWOGGWMVPPTXPagesPDFDOCXRAWHEVCH.264AIFFM4VWMA3GPDNGRTFPSDOGVTSFLVAIXLSXCSVZIPAPNGMIDIJPEG XLMPG/MPEGVOBM2TSAC3ALACDTSJP2HEIFAPECBZ3G2SRTDOCPPTXLSODTODSM3URAR7ZM4BAMRTXTMOBITARGZJSONXMLYAMLKEYMTSCR2NEFMXFTGACAFASSVTTDSFRMF4VWVASFRMVBORFRW2EAC-3TTAISODMGXZDjVuFB2AUAZW3MKAEXRVCFICSAAXPRCMP2SPXXSPFM3U8