MP3 to AAC Converter

Convert MP3 audio to AAC with bitrate, resampling, and channel options

Click to upload file or drag and drop file here

Maximum file size: 50MB Supported formats: audio/mpeg, audio/mp3

Select the source audio file

Key Facts

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

Overview

Easily convert your MP3 audio files to the AAC format with this efficient online tool, offering customizable settings for bitrate, sample rate, and channel configuration to suit your specific audio requirements.

When to Use

  • •When you need to prepare audio files for Apple devices or platforms that prefer the AAC format.
  • •When you want to optimize file size while maintaining high audio quality through specific bitrate adjustments.
  • •When you need to downmix audio channels or adjust sample rates for compatibility with specific media players.

How It Works

  • •Upload your source MP3 file using the file selector.
  • •Adjust the output settings including bitrate, sample rate, and channel count as needed.
  • •Click the convert button to process your file and download the resulting AAC audio.

Use Cases

Optimizing music libraries for better compatibility with iOS and iTunes.
Reducing audio file sizes for web streaming without significant quality loss.
Standardizing audio sample rates for professional editing or broadcasting projects.

Examples

1. Optimizing for Mobile Storage

Podcast Listener
Background
I have several high-bitrate MP3 files taking up too much space on my phone.
Problem
Need to reduce file size while keeping decent audio quality for mobile playback.
How to Use
Upload the MP3, set the bitrate to 128 kbps, and convert to AAC.
Example Config
bitrate: 128, sampleRate: auto, channels: auto, keepMetadata: true
Outcome
A smaller AAC file that sounds great and saves significant storage space.

2. Preparing Audio for Apple Devices

Music Producer
Background
I need to share a demo track with a client who uses Apple devices exclusively.
Problem
The original MP3 format is not the preferred standard for the client's workflow.
How to Use
Upload the track, select 256 kbps for high fidelity, and ensure metadata is preserved.
Example Config
bitrate: 256, sampleRate: 44100, channels: 2, keepMetadata: true
Outcome
A high-quality AAC file that maintains all track information and plays perfectly on Apple hardware.

Try with Samples

audio, 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
Copyright-Free WAV Audio Samples
Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
preferred input family audio
audio
Copyright-Free M4A Audio Samples
Apple iTunes compatible M4A audio samples with AAC encoding, optimized for quality and file size balance
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

Is there a file size limit for uploads?

Yes, the tool supports files up to 50 MB.

Can I keep my original audio tags?

Yes, the 'Keep Metadata' option is enabled by default to preserve title and artist information.

What bitrates are available?

You can choose from 96, 128, 160, 192, 256, or 320 kbps.

Does this tool support batch conversion?

No, this tool is designed to process one audio file at a time.

Can I change the audio to mono?

Yes, you can select 'Mono (1 channel)' in the Audio Channels settings.

API Documentation

Request Endpoint

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

Request Parameters

Parameter Name Type Required Description
audioFile file (Upload required) Yes Select the source audio file
bitrate select No -
sampleRate select No -
channels select No -
keepMetadata checkbox No -

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