Files never leave your device. Any size, any length.
M4R to MP3.
No size, no length limits.
iPhone ringtones as MP3 for Android and elsewhere.
Files never leave your device. Any size, any length.
iPhone ringtones as MP3 for Android and elsewhere.
On your device
M4R ringtone files (MPEG-4) usually carry AAC audio and come from iPhone ringtones. iPhone ringtones as MP3 for Android and elsewhere.
Is my M4R file uploaded?
No. M4R files convert inside your browser; nothing leaves your device.
Is there a file size or duration limit?
No. mp3fy streams the file while converting, so a 20 GB recording or a 10‑hour lecture works the same as a short clip.
What bitrate should I pick?
192 kbps is the sweet spot for music and speech; 128 kbps for voice notes and podcasts; 320 kbps if you want the maximum. You can also keep stereo or down‑mix to mono.
Are my tags and cover art kept?
Yes — title, artist, album and embedded cover art are carried over into the MP3 when the source has them.