Tools / File Converter / AAC to M4R Converter

AAC to M4R Converter

Convert AAC files to M4R. Free, without uploading.

This tool converts AAC files to M4R. AAC is the lossy codec designed to succeed MP3; it sounds better than MP3 at the same bitrate.

M4R is the iPhone ringtone format (AAC audio inside). Ringtones can be up to 40 seconds. M4R is lossy; you choose the quality from 96 to 320 kbps. 192–256 kbps is enough for music, 128 kbps for speech.

Conversion runs on your device; your file is never sent to a server. The components download once on first use, and later conversions start right away.

How to use

1. Choose the AAC file, drag it in, or paste its link.
2. Choose the audio quality; optionally enter a start and end time.
3. Press "Convert" and download the M4R file.

Frequently asked questions

Will audio quality drop when converting to M4R?

M4R is lossy, so there is a small loss you won’t hear at higher bitrates. If the source is already lossy, a higher bitrate won’t improve it.

Is there a file size limit?

No fixed limit; your device’s memory decides. Computers usually handle files up to 1–2 GB.

Is my file uploaded?

No. Your AAC file is converted to M4R inside your browser.