Pull a favorite clip's audio out of an MP4, trim it to about 40 seconds as M4R, and import it as a custom iPhone ringtone.
About MP4
Common video container format
MP4 is the most widely used video container, bundling video, audio (usually AAC), and subtitles together; this tool extracts the audio track and converts it to common audio formats.
- Excellent compatibility — plays on nearly every device and platform
- Requires extracting the audio track first; the full video file is much larger than the audio alone
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
MP4 to M4R FAQ
Will converting MP4 to M4R lose quality?
Both MP4 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 MP4 to M4R?
Just drop multiple MP4 files in; they are converted to M4R one by one via a queue. You can download them individually or as a single ZIP.