AMR to MP3 Converter

Convert AMR (Adaptive Multi-Rate) audio files to MP3 format

Click to upload file or drag and drop file here

Maximum file size: 20MB Supported formats: audio/amr, audio/x-amr, audio/AMR, .amr, .awb

Upload an AMR file to convert to MP3

AMR is typically 12.2 kbps for speech. 128 kbps is recommended for voice audio.

Key Facts

Category
Images, Audio & Video
Input Types
file, select, checkbox
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

Easily convert AMR (Adaptive Multi-Rate) voice recordings from mobile devices into widely compatible MP3 audio files. This online converter allows you to customize the output bitrate, sample rate, and audio channels while preserving metadata, ensuring your speech and voice recordings are optimized for playback on any modern media player.

When to Use

  • •When you need to play legacy mobile voice memos or call recordings (.amr or .awb) on modern devices that only support MP3.
  • •When preparing voice recordings for transcription software or audio editors that do not accept the AMR format.
  • •When you want to share voice notes via messaging apps or email in a universally compatible audio format.

How It Works

  • •Upload your AMR or AWB audio file using the file selector.
  • •Choose your target MP3 settings, including bitrate (up to 192 kbps), sample rate, and audio channels (mono or stereo).
  • •Click convert to process the audio and download your high-quality MP3 file.

Use Cases

Converting old mobile phone voice memos to MP3 for archiving and easy playback.
Preparing call center voice recordings for integration into customer service quality assurance platforms.
Transcoding legacy GSM voice recordings to MP3 for compatibility with modern web-based audio players.

Examples

1. Archiving Legacy Mobile Voice Memos

Family Historian
Background
A user has a collection of old voice memos recorded on an early 2000s Nokia phone saved in .amr format.
Problem
Modern smartphones and media players cannot natively play these legacy AMR files.
How to Use
Upload the AMR file, set the bitrate to 128 kbps, select 'Mono' for channels, keep 'Keep Metadata' checked, and convert.
Example Config
Bitrate: 128 kbps, Sample Rate: Auto, Channels: 1 (Mono), Keep Metadata: True
Outcome
A highly compatible MP3 file that plays perfectly on modern smartphones while preserving the original voice quality.

2. Preparing Call Recordings for Transcription

Journalist
Background
A journalist received several call recordings from an interview source in AMR format.
Problem
The automated transcription software only accepts MP3 or WAV files.
How to Use
Upload the AMR file, select a 16 kHz sample rate (Wideband voice) to match the source quality, and set the bitrate to 96 kbps.
Example Config
Bitrate: 96 kbps, Sample Rate: 16000 Hz, Channels: 1 (Mono), Keep Metadata: False
Outcome
A lightweight MP3 file optimized for speech recognition, allowing the transcription software to process the interview accurately.

Try with Samples

audio, file
AMR Narrowband Audio Sample
AMR-NB voice audio sample for telephony playback, upload, and format conversion workflows
title token amr
audio
Copyright-Free MP3 Audio Samples
Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
title token mp3
audio
GSM Audio Sample
GSM encoded audio sample for telephony playback, upload, and format conversion workflows
preferred input family audio
audio
Copyright-Free FLAC Audio Samples
Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
preferred input family audio
audio

Related Hubs

Audio Encoding and Format Conversion Tools
Compare audio format conversion, bitrate changes, sample-rate conversion, codec swaps, and export tools in one hub for delivery and archive workflows.
Audio Editing and Cleanup Tools
Compare audio trimming, silence removal, fades, mixing, and denoise tools in one hub for podcast, voiceover, and music cleanup workflows.
Audio Preview, Tone, and Effect Generator Tools
Compare audio preview generation, silence creation, ringtone building, fingerprinting, loudness reports, and effect-style audio generators in one hub.
Audio Measurement and Inspection Tools
Compare loudness, dynamic range, peak, BPM, key detection, spectral inspection, and metadata review tools in one hub for audio analysis.

FAQ

What is the maximum file size supported?

You can upload AMR files up to 20 MB in size.

Can I convert AWB files as well?

Yes, the converter supports both standard AMR (.amr) and Adaptive Multi-Rate Wideband (.awb) files.

Which bitrate should I choose for voice recordings?

A bitrate of 128 kbps is highly recommended for clear voice and speech audio.

Should I choose mono or stereo channels for AMR files?

Mono (1 channel) is recommended since AMR is a speech-optimized format that natively records in mono.

Will the converter preserve my audio tags?

Yes, enabling the 'Keep Metadata' option preserves available title and artist tags in the output MP3.

API Documentation

Request Endpoint

POST /en/api/tools/amr-to-mp3

Request Parameters

Parameter Name Type Required Description
audioFile file (Upload required) Yes Upload an AMR file to convert to MP3
bitrate select No AMR is typically 12.2 kbps for speech. 128 kbps is recommended for voice audio.
sampleRate select No -
channels select No -
keepMetadata checkbox No -

File type parameters need to be uploaded first via POST /upload/amr-to-mp3 to get filePath, then pass filePath to the corresponding file field.

Response Format

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
File: File

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-amr-to-mp3": {
      "name": "amr-to-mp3",
      "description": "Convert AMR (Adaptive Multi-Rate) audio files to MP3 format",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=amr-to-mp3",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

Supports URL file links or Base64 encoding for file parameters.

If you encounter any issues, please contact us at [email protected]