.AMR File Extension

Adaptive Multi-Rate Codec File

Developer Ericsson
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What is an AMR file?

An AMR file is an audio file saved in a compressed format developed by Ericsson. It is optimized for storing spoken audio and is used by many 3G cell phones to store voice recordings, which include MMS messages. Various media players can open AMR files, including VideoLAN VLC media player and Apple QuickTime Player.

More Information

Screenshot of a .amr file in VideoLAN VLC media player
AMR file open in VideoLAN VLC media player

AMR files incorporate the Algebraic Code Excited Linear Prediction (ACELP) algorithm, designed to compress human speech audio efficiently. Additionally, the files may be saved in the AMR-NB (Narrowband) or AMR-WB (Wideband) format. Wideband audio supports a broader frequency range, providing better sound quality.

How to open an AMR file

You can open and play an AMR file in VideoLAN VLC media player (multiplatform), Microsoft Media Player (Windows), or Apple QuickTime Player (Mac). You can also edit the audio data an AMR file contains in Audacity (multiplatform), provided you've installed Audacity's optional FFmpeg library.

How to convert an AMR file

VideoLAN VLC media player, FFmpeg, and Audacity (with the optional FFmpeg library installed) can convert AMR files to other audio file types. For example, VLC media player can convert AMR files to the following formats:

  • .MP3 - MP3 Audio
  • .OGG - Ogg Vorbis Audio
  • .FLAC - Free Lossless Audio Codec

Programs that open AMR files

Verified by FileInfo.com

The FileInfo.com team has independently researched the Adaptive Multi-Rate Codec file format and Mac, Windows, Linux, Android, and iOS apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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