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Audio LUFS Normalizer

Normalize audio to broadcast/podcast LUFS standards

Applies FFmpeg loudnorm using preset targets for -16, -14, or -23 LUFS.

Click to upload file or drag and drop file here

Maximum file size: 200MB Supported formats: audio/*

Key Facts

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

Overview

The Audio LUFS Normalizer adjusts audio files to meet specific loudness standards measured in LUFS (Loudness Units Full Scale). It uses FFmpeg's loudnorm filter to normalize audio to preset targets for podcasts (-16 LUFS), streaming (-14 LUFS), or broadcast (-23 LUFS), ensuring consistent volume levels across platforms.

When to Use

  • •When preparing audio episodes for podcast distribution to comply with industry loudness standards.
  • •When uploading music or audio to streaming services that require specific LUFS levels for optimal playback.
  • •When producing audio for broadcast television or radio to meet regulatory loudness requirements.

How It Works

  • •Upload your audio file in a supported format such as MP3, WAV, or AAC.
  • •Select the target LUFS standard: Podcast (-16 LUFS), Streaming (-14 LUFS), or Broadcast (-23 LUFS).
  • •Choose the desired output format from options like MP3, AAC, FLAC, or others.
  • •The tool processes the audio using FFmpeg's loudnorm filter and provides a normalized file for download.

Use Cases

Podcasters normalizing episode audio to -16 LUFS for a consistent listener experience.
Musicians preparing tracks for streaming platforms that recommend -14 LUFS.
Broadcast engineers ensuring audio meets -23 LUFS standards for television or radio transmission.

Examples

1. Normalize Podcast Episode

Podcast Producer
Background
A podcast producer has recorded an episode with varying loudness levels that need standardization for distribution.
Problem
The audio has inconsistent volume, with some sections too loud and others too quiet, affecting listener comfort.
How to Use
Upload the audio file 'episode_raw.mp3', select 'Podcast -16 LUFS' as the target standard, and choose 'MP3' as the output format.
Outcome
The normalized audio file 'episode_normalized.mp3' is downloaded, with consistent loudness at -16 LUFS.

2. Prepare Music for Streaming

Independent Artist
Background
An artist is uploading their latest track to a streaming service that requires audio normalized to -14 LUFS.
Problem
The original track has peaks exceeding the recommended loudness, risking distortion or rejection by the platform.
How to Use
Upload 'track_master.wav', select 'Streaming -14 LUFS', and output as 'AAC' format.
Outcome
The tool outputs 'track_normalized.aac' with loudness adjusted to -14 LUFS, ready for upload.

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 audio
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 audio
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
title token audio
audio
Copyright-Free OGG Vorbis Audio Samples
Open-source OGG Vorbis audio samples for testing and development, featuring excellent compression with nature sounds and meditation music
title token audio
audio

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FAQ

What is LUFS?

LUFS stands for Loudness Units Full Scale, a standard for measuring audio loudness used in broadcasting and streaming to ensure consistent volume levels.

What audio formats are supported for input?

The tool accepts any audio file format supported by FFmpeg, including MP3, WAV, AAC, OGG, and more.

Is there a file size limit?

Yes, the maximum file size is 200 MB (209715200 bytes).

Can I choose a custom LUFS target?

No, the tool uses preset targets for podcast (-16 LUFS), streaming (-14 LUFS), and broadcast (-23 LUFS). Custom targets are not supported.

How long does normalization take?

Processing time depends on the file size and length, but it typically completes within a few minutes for standard audio files.

API Documentation

Request Endpoint

POST /en/api/tools/audio-lufs-normalizer

Request Parameters

Parameter Name Type Required Description
audioFile file (Upload required) Yes -
targetStandard select No -
outputFormat select No -

File type parameters need to be uploaded first via POST /upload/audio-lufs-normalizer 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-audio-lufs-normalizer": {
      "name": "audio-lufs-normalizer",
      "description": "Normalize audio to broadcast/podcast LUFS standards",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=audio-lufs-normalizer",
      "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]