Tools / File Converter / AMR to M4R Converter

AMR to M4R Converter

Convert AMR files to M4R. Free, without uploading.

This tool converts AMR files to M4R. AMR is a low-bitrate speech format used by older phones and voice recorders.

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 AMR 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 AMR file is converted to M4R inside your browser.