Convert AMR to M4R
Choose file to convert
We offer a free online converter that can convert audio files from amr format to m4r format, along with a range of other audio formats.
How to convert amr to m4r?
Step 1
Upload amr-file
You can select amr file you want to convert from your computer, Google Drive, Dropbox or simply drag and drop it onto the page.
Step 2
Select «to m4r»
Choose m4r or any of the other 200+ supported formats you'd like to convert to.
Step 3
Download your m4r file
Please wait for the conversion to complete, then click on the download button to obtain your converted file in the m4r format.
The security of your files is our priority
Understanding the importance of the security of our users' data, we have implemented a number of measures to ensure reliable file conversion without the risk of information leakage or privacy violations.
Data encryption
All information uploaded to our platform is SSL encrypted, ensuring privacy during transmission.
Safe storage
After the conversion is completed, the files are stored on secure servers for 24 hours and are automatically destroyed, excluding access by third parties.
Harmless scripts
Our file conversion tools are regularly tested for malicious code or vulnerabilities to eliminate the risk of a potential cyber attack.
Best tool to convert amr to m4r
amr to m4r Fast and easy
Simply drag and drop your amr files onto the webpage, and you'll be able to convert them to m4r or over 250 different file formats, all without having to register, provide an email address, or include a watermark.
Secure amr to m4r Conversion
As soon as you upload your amr files, we instantly delete them. Converted files are then deleted after 24 hours. Furthermore, we ensure that all file transfers are secure through advanced SSL encryption.
No Software Installation Required
You don't have to go through the hassle of installing any software. We handle all amr to m4r conversions in the cloud, which means that none of your computer's resources will be used in the process.
Adaptive Multi-Rate Codec File
| Extension | .amr |
| Category | 🔵 audio |
| Programs | 🔵 Apple QuickTime 🔵 Realplayer 🔵 VLC media Player |
| Main program | 🔵 Audacity |
| Description | 🔵 AMR is a compressed file format that is designed to improve speech coding and includes multiple sampling rates for narrowband devices used in encoding or decoding. AMR files can be recorded using mobile phones. To play video and audio files simultaneously or achieve random access memory, one can use the 3GPP format. Each frame contains 160 20-millisecond samples that are encoded using AMR with ACELP, DTX, VAD, and CNG. Recorded AMR files can be converted to other formats for distribution and use. |
| Technical details | 🔵 AMR is capable of encoding signals in the range of 4.75 to 12.2 kbit/s, with quality starting at 7.4 kbit/s. 3GPP adopted this file format in 1999, which is used by GSM and UMTS. It employs link adaptation to choose from eight different bit rates. AMR optimizes link adaptation by selecting the best codec devices for use on radio channels and capacity requirements. However, this optimization only works if the connection is strong enough to prevent any loss of audio quality. |
| Developer | 🔵 3rd Generation Partnership Project (3GPP) |
| MIME type | 🔵 audio/amr |
iPhone Ringtone File
| Extension | .m4r |
| Category | 🔵 audio |
| Programs | 🔵 Apple QuickTime Player |
| Main program | 🔵 Apple iTunes |
| Description | 🔵 This format is used in smartphones of the iPhone series. Mainly, this format is an AAC and M4A file. Not all audio files from the iTunes store can be converted to M4R. When syncing with an iPhone and a computer, these files are automatically transferred to the phone. These files can be purchased or downloaded from iTunes. Additionally, audio files in other formats can be converted to the M4R format. This format ensures the best possible ringtone for iPhone. |
| Technical details | 🔵 M4R differs from MP3 due to its compression method. This format is part of the MPEG-4 standard, specifically under the ISO-IEC standard 14495-3. Despite employing auditory masking, the lossy compression of M4R is comparable to AAC and MP3 files. It works by reducing audio size by eliminating data and sounds that are imperceptible to the human ear. This allows M4R to create high-quality audio files without taking up a lot of storage space. Users can select any audio of their choice for use, such as a ringtone or alert tone. |
| Developer | 🔵 Apple Inc |
| MIME type | 🔵 audio/aac |