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MP3 to FLAC Converter

Convert MP3 audio to FLAC (lossless) with optional resampling and channel selection

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

Overview

Easily convert your MP3 audio files to the high-quality, lossless FLAC format with our efficient online converter. This tool allows you to preserve your audio library while offering customizable options for sample rates, channel configurations, and metadata retention.

When to Use

  • •When you want to archive your digital music collection in a lossless format.
  • •When you need to adjust audio sample rates or channel counts for specific playback devices.
  • •When you want to convert compressed MP3 files without losing existing track information like artist and title tags.

How It Works

  • •Upload your MP3 file using the file selector.
  • •Adjust your preferred sample rate and channel settings if needed.
  • •Ensure the 'Keep Metadata' option is checked to preserve your tags.
  • •Click the convert button to generate and download your new FLAC file.

Use Cases

Archiving personal music collections for high-fidelity playback.
Standardizing audio files for professional editing or production workflows.
Converting legacy MP3 recordings into a more robust, lossless format for long-term storage.

Examples

1. Archiving a Personal Music Library

Audiophile
Background
An enthusiast wants to move their MP3 collection to a high-fidelity home audio system.
Problem
MP3 files are compressed and lack the depth required for high-end audio equipment.
How to Use
Upload the MP3 file, set the sample rate to 48 kHz, and ensure 'Keep Metadata' is enabled.
Example Config
sampleRate: 48000, channels: auto, keepMetadata: true
Outcome
A high-quality FLAC file that retains all original track information, ready for high-fidelity playback.

2. Downmixing for Compatibility

Podcast Editor
Background
A creator has a stereo MP3 recording that needs to be converted to a mono FLAC file for a specific broadcast requirement.
Problem
The source file is stereo, but the distribution platform requires a mono format.
How to Use
Upload the file and select 'Mono (1 channel)' from the channel options.
Example Config
channels: 1, sampleRate: auto, keepMetadata: true
Outcome
A mono FLAC file that meets the technical specifications of the distribution platform.

Try with Samples

audio, file
Copyright-Free FLAC Audio Samples
Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
title token flac
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 AAC Audio Samples
High-quality AAC encoded audio samples for testing and development, featuring nature sounds and meditation music with excellent compression
preferred input family audio
audio

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FAQ

Is FLAC better than MP3?

FLAC is a lossless format, meaning it retains the original audio quality without the compression artifacts found in MP3 files.

Will I lose audio quality during conversion?

While the conversion creates a lossless file, it cannot restore data that was already lost during the initial MP3 compression.

Can I change the sample rate?

Yes, you can select from various sample rates like 44.1 kHz, 48 kHz, or 96 kHz to suit your requirements.

Does this tool keep my song metadata?

Yes, the tool includes an option to preserve your existing title, artist, and album tags during the conversion process.

Is there a file size limit?

The tool supports files up to 50MB to ensure stable and fast processing.

API Documentation

Request Endpoint

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

Request Parameters

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

File type parameters need to be uploaded first via POST /upload/mp3-to-flac 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-flac": {
      "name": "mp3-to-flac",
      "description": "Convert MP3 audio to FLAC (lossless) with optional resampling and channel selection",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=mp3-to-flac",
      "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]