M4R keeps AAC encoding but trims to about 40 seconds for iPhone ringtones. Cut your M4A to the clip you want first, then convert.
About M4A
Common audio container in Apple ecosystem
M4A is an MPEG-4 audio container, usually AAC or ALAC encoded, widely used across Apple devices and iTunes with a good balance of size and quality.
- Good balance of size and quality
- Native to the Apple ecosystem
- Limited support on some non-Apple players
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
M4A to M4R FAQ
Will converting M4A to M4R lose quality?
If your M4A file is ALAC (lossless), converting to M4R will introduce quality loss — choose a higher bitrate. If it is already AAC (lossy), re-compression may further reduce quality.
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 M4A to M4R?
Just drop multiple M4A files in; they are converted to M4R one by one via a queue. You can download them individually or as a single ZIP.