Ringtone Maker (iPhone & Android)

Turn the best part of a song into a ringtone. Choose where it starts and how long it lasts, add a gentle fade in and out, and save it as an M4R file for iPhone or an MP3 or OGG for Android. The song is cut and encoded in your browser; nothing is uploaded.

How to use this tool

1. Choose the song (a video works too).
2. Type the start time, for example the start of the chorus, and the length (30 s is a good ringtone length).
3. Keep the fades and "Make it loud" on so the ringtone starts softly and is easy to hear.
4. Pick iPhone or Android, press Calculate, listen and download; the note under the result explains how to install it.

Formula

Ringtone = song[start … start + length], fade in, fade out, gain = 10^(−1 ÷ 20) ÷ peak

The fades are linear volume ramps. Normalising scales the clip so its loudest moment reaches −1 dBFS, a little below full scale to avoid distortion on phone speakers; because lossy encoders can push loud peaks higher, the encoded file is checked and, if needed, lowered by the overshoot and encoded again. The iPhone M4R is AAC at 256 kbps in an iTunes-style MP4 container and the OGG is Vorbis; both are made by the ffmpeg engine (about 30 MB, downloaded once). The Android MP3 is encoded with LAME at 192 kbps.

Example

For a chorus that starts at 1:05, start = 1:05 and length = 30 s gives a ringtone from 1:05 to 1:35, fading in over 0.5 s and out over the last 1.5 s.