M4R to OPUS Converter

Convert M4R (MPEG-4 Part 14) to OPUS (Opus Audio Codec) online and completely free.

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How to convert M4R to OPUS online

  • 1To get started, upload one or more .m4r files to the converter area.
  • 2Then use the audio conversion settings and click the "Convert" button.
  • 3When the conversion is complete, you can download .opus files.
M4R to OPUS Converter

M4R
M4R (MPEG-4 Part 14)

M4R is the audio format used by Apple in the iTunes application. M4R files are usually ringtones that you can install on your iPhone. At its core, M4R is a regular M4A (MPEG-4) audio file, and the .m4r extension is used to distinguish ringtones from other melodies. Often the maximum length of an M4K ringtone is limited to 40 seconds. If you downloaded such a file from the music store on your iPhone, you will need to convert it to use on other devices.
File type: Audio
File extension: .m4r
Developed by: Apple Inc.
Initial release: 2001

OPUS
OPUS (Opus Audio Codec)

OPUS is an audio codec and file format of the same name designed for storing audio. OPUS provides lossy compression and was intended for streaming audio in online broadcasts. Files in the OPUS format support bitrates from 6 to 510 kbps and provide low latency during encoding, which is why it is widely used in video conferences, voice communication (VOIP), video chats, etc. OPUS also allows you to work with regular music files.
File type: Audio
File extension: .opus
Developed by: Internet Engineering Task Force & Xiph.Org Foundation
Initial release: September 11, 2012

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