Online AMR converter
Choose file to convert
Effortlessly transform your audio files into the amr format at no cost, utilizing our online converter.
How to convert a amr file?
Step 1
Upload an-file
You can select the file you wish to convert from your computer, Google Drive, Dropbox or just drag and drop it onto the page.
Step 2
Select «to amr»
Choose amr or any other of the 200+ supported formats that you wish to convert to.
Step 3
Download your amr file
Please wait for the conversion to be completed, then click on the download button to get your converted file in the amr format.
Best amr converter tool
Converting amr is fast and easy
Just drag and drop your amr files onto the webpage, and you'll have the capability to convert them over 250 different file formats, all without the need to register, provide an email address, or include a watermark.
Safe amr Conversion
Immediately upon uploading your amr files, we delete them without delay. Converted files are then removed after 24 hours. Additionally, we ensure that all file transfers are secure through advanced SSL encryption.
No Software Installation Required
There's no need to go through the inconvenience of installing any software. We conveniently handle all amr to {format2} conversions in the cloud, which implies that none of your computer's resources will be consumed 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 compact file format primarily developed for speech coding. It uses various sampling rates specifically designed for narrowband devices used in encoding and decoding. This format is commonly used in mobile phones for recording audio files. The 3GPP format is used to play both audio and video simultaneously or to support random access memory capabilities. Each AMR file frame contains 160 samples, each lasting 20 milliseconds. These samples are encoded using methods like Algebraic Code Excited Linear Prediction (ACELP), Discontinuous Transmission (DTX), Voice Activity Detection (VAD), and Comfort Noise Generation (CNG). After recording, these AMR files can easily be converted to other formats for broader distribution. |
| Technical details | 🔵 AMR can encode signals at rates ranging from 4.75 to 12.2 kbit/s, but quality significantly improves above 7.4 kbit/s. The 3rd Generation Partnership Project (3GPP) adopted this format in 1999, and it's since become widely used in Global System for Mobile Communications (GSM) and Universal Mobile Telecommunications System (UMTS) networks. This system utilizes link adaptation to select one of eight different bit rates. AMR enhances link adaptation by choosing the codec best suited for the radio channel and its capacity requirements. However, this enhancement only works effectively if the connection is strong enough to maintain audio quality. |
| Developer | 🔵 3rd Generation Partnership Project (3GPP) |
| MIME type | 🔵 audio/amr |