How to convert AMR files to MP3 online?

Step 1.

Upload AMR-file

Click "Choose File" button to select a amr file on your computer. AMR file size can be up to 50 Mb.
Step 2.

Convert AMR to MP3

Click "Convert" button to start conversion.
Step 3.

Download your MP3

Let the file convert and you can download your MP3 file right afterwards.

Information about AMR and MP3 file formats

Name AMR MP3
Full name AMR - Adaptive Multi-Rate MP3 - MPEG-1 or MPEG-2 Audio Layer III
File extension .amr, .3ga .mp3
MIME type audio/amr audio/mpeg, audio/MPA, audio/mpa-robust
Developed by 3GPP Fraunhofer Institute
Type of format Audio compression format Digital audio
Description The Adaptive Multi-Rate (AMR or AMR-NB or GSM-AMR) audio codec is an audio compression format optimized for speech coding. AMR was adopted as the standard speech codec by 3GPP in October 1999 and is now widely used in GSM and UMTS. MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players.
Technical details AMR speech codec consists of a multi-rate narrowband speech codec that encodes narrowband (200-3400 Hz) signals at variable bit rates ranging from 4.75 to 12.2 kbit/s with toll quality speech starting at 7.4 kbit/s. Sampling frequency 8 kHz/13-bit (160 samples for 20 ms frames), filtered to 200-3400 Hz. The use of lossy compression is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio. An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 1/11 the size of the CD file created from the original audio source.
Associated programs Audacity, FFmpeg, MPlayer, QuickTime, VLC media player VLC media player, MPlayer, Winamp, foobar2000.
Wiki https://en.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_codec https://en.wikipedia.org/wiki/MP3