MP3 to M4R
Turn an MP3 into an M4R iPhone ringtone. Free, with no upload.
Drop files to convert
See their format, then choose an output.
MP3, M4A, WAV, FLAC, and other audio, or a video with sound. You can also drag in a whole folder.
How to make an iPhone ringtone from an MP3
iPhones take ringtones as M4R files: AAC sound, up to 40 seconds long. Open an MP3 here and save it as an M4R, then add it to your iPhone from a computer. The converter runs in your browser, so your song is never uploaded.
Step 1
Choose your MP3Pick a song of up to 40 seconds, or drop it above.Step 2
Keep M4RM4R is selected, the format iPhones take as a ringtone.Step 3
Download the ringtoneThen drag it onto your iPhone in Finder or iTunes.
What to expect
- Supported inputs
- MP3 files and any other audio or video file.
- What happens
- The sound is re-encoded as AAC in an MP4 file with the .m4r ending. M4R is selected first; you can choose another audio format.
- Limits
- Ringtones can be up to 40 seconds long, and Finder won't add a longer one, so trim the song first. Firefox has no AAC encoder; use Chrome, Edge, or Safari.
Private by design
Your video stays on your device
Mastershot processes your file locally in this browser. It does not need to be uploaded to a server, and you do not need an account to use the tool.
- No upload
- No signup
- No watermark
Questions
Connect the iPhone to a computer, open it in Finder on a Mac or in iTunes on Windows, and drag the M4R onto it. Then choose it in Settings, under Sounds & Haptics.
Up to 40 seconds. Text tones and alerts can be up to 30.
Yes, with GarageBand on the iPhone: open the song in a project, then share it as a ringtone.