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AAC to MP3 Converter

Convert AAC audio to MP3 with controllable bitrate, resampling, and channel selection

Click to upload file or drag and drop file here

Maximum file size: 40MB Supported formats: audio/aac, audio/mp4, audio/x-aac

Upload an AAC file to convert to MP3

Key Facts

Category
Media
Input Types
file, select, checkbox
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

The AAC to MP3 Converter transforms AAC audio files into the widely compatible MP3 format. You can adjust bitrate, sample rate, and audio channels to optimize quality and file size, with an option to preserve metadata tags like title and artist.

When to Use

  • •When you need to play AAC files on devices or platforms that only support MP3 format.
  • •To reduce audio file size by selecting a lower bitrate for efficient storage or streaming.
  • •When standardizing audio formats for projects, distribution, or web use where MP3 is preferred.

How It Works

  • •Upload your AAC audio file using the file selector, supporting formats like audio/aac and audio/mp4.
  • •Choose your desired bitrate from 128 to 320 kbps, sample rate (auto, 44.1 kHz, or 48 kHz), and audio channels (auto, mono, or stereo).
  • •Optionally enable the 'Keep Metadata' setting to preserve available tags such as title and artist information.
  • •Click convert to process the file and download the resulting MP3 audio.

Use Cases

Converting podcast recordings from AAC to MP3 for compatibility with various podcast hosting platforms.
Reducing the file size of music tracks by lowering bitrate for storage on mobile devices with limited space.
Preparing audio files for web embedding or online distribution where MP3 is the standard format.

Examples

1. Podcast Episode Conversion

Podcaster
Background
A podcaster records episodes in AAC format but needs MP3 for distribution on platforms that don't support AAC.
Problem
AAC files cause playback issues for some listeners, limiting audience reach.
How to Use
Upload the AAC podcast file, set bitrate to 128 kbps for smaller size, keep sample rate auto, enable metadata preservation, and convert.
Outcome
An MP3 file is generated with preserved episode metadata, ready for upload to podcast hosts without compatibility problems.

2. Music File Size Optimization

Music Enthusiast
Background
A user has high-quality AAC music files but wants to save storage space on their smartphone.
Problem
Large AAC files consume excessive storage, reducing the number of songs that can be stored.
How to Use
Upload the AAC file, select a lower bitrate like 128 kbps, set channels to stereo, and convert to MP3.
Outcome
The MP3 file is significantly smaller, allowing more songs to be stored on the device with acceptable audio quality for casual listening.

Try with Samples

audio, video, file
Copyright-Free AAC Audio Samples
High-quality AAC encoded audio samples for testing and development, featuring nature sounds and meditation music with excellent compression
title token aac
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
WebRTC Real-Time Communication Samples
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preferred input family audio
audio
Bevy Game Engine Samples
Bevy Rust game engine examples with ECS, 2D/3D graphics, audio, and game mechanics implementations
preferred input family audio
audio

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FAQ

What input audio formats are supported?

The tool accepts AAC files in formats including audio/aac, audio/mp4, and audio/x-aac.

What is the default bitrate for conversion?

The default bitrate is 192 kbps, but you can select from 128, 160, 192, 256, or 320 kbps.

Can I convert multiple files at once?

No, this tool processes one audio file per conversion to ensure accuracy and control.

Will metadata like song title be preserved?

Yes, if you enable the 'Keep Metadata' option, it will attempt to retain available tags in the output MP3.

What sample rate options are available?

You can choose auto (keep original), 44.1 kHz, or 48 kHz for the output sample rate.

API Documentation

Request Endpoint

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

Request Parameters

Parameter Name Type Required Description
audioFile file (Upload required) Yes Upload an AAC file to convert to MP3
bitrate select No -
sampleRate select No -
channels select No -
keepMetadata checkbox No -

File type parameters need to be uploaded first via POST /upload/aac-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-aac-to-mp3": {
      "name": "aac-to-mp3",
      "description": "Convert AAC audio to MP3 with controllable bitrate, resampling, and channel selection",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=aac-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]