# Audio Loudness LUFS Normalizer

Measure integrated LUFS, true peak, and LRA, then normalize audio to Spotify, Apple Music, broadcast, or custom targets

> Canonical page: https://elysiatools.com/en/tools/audio-loudness-lufs-normalizer

- **Category:** Media

- **Keywords:** audio, lufs, loudness, normalizer, spotify, broadcast

## Overview

Runs FFmpeg loudnorm in a measurement-first workflow, writes a normalized audio file, and reports before/after loudness metrics.

## Inputs

- **Audio File** (file)
- **Target Preset** (select)
- **Custom Integrated LUFS** (number)
- **Custom True Peak dB** (number)
- **Custom LRA** (number)
- **Output Format** (select)

## When to use

- When preparing podcast episodes or music tracks for distribution on streaming platforms like Spotify or Apple Music.
- When mastering audio for television or radio broadcasts that require strict compliance with standard loudness regulations.
- When matching the volume levels of multiple audio files to ensure a consistent listening experience across a playlist.

## How it works

- Upload your audio file and select a target preset, such as Spotify, Apple Music, broadcast, or a custom LUFS level.
- The tool runs a measurement pass to analyze the source file's integrated LUFS, true peak, and loudness range (LRA).
- FFmpeg's loudnorm algorithm applies precise gain adjustments and limiting to match your target parameters.
- Download the normalized audio file in your chosen output format, complete with a comparison of before and after loudness metrics.

## Use cases

- Normalizing a podcast episode to -16 LUFS for consistent playback on Apple Podcasts.
- Preparing a music track for Spotify distribution at -14 LUFS with a -1.5 dB True Peak ceiling.
- Standardizing broadcast audio to -23 LUFS to comply with television transmission standards.

## Frequently asked questions

### What target presets are supported?

You can select presets for Spotify (-14 LUFS), Apple Music (-16 LUFS), broadcast (-23 LUFS), podcast (-16 LUFS), or define custom targets.

### Which audio formats can I upload and download?

You can upload common audio files and export them as MP3, WAV, FLAC, M4A, OGG, or match the source format.

### What is LUFS?

LUFS stands for Loudness Units relative to Full Scale, a standard measurement of perceived audio loudness.

### Does this tool alter the dynamic range of my audio?

Yes, the loudnorm algorithm uses dynamic range compression if necessary to meet the target LUFS and true peak limits without clipping.

### Is there a file size limit for uploads?

Yes, the maximum supported audio file size is 200 MB.

## Related tools

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- [Audio Podcast Loudness Compliance Report](https://elysiatools.com/en/tools/audio-podcast-loudness-compliance-report): Compare integrated LUFS, true peak, LRA, stereo/mono, bitrate and sample rate against Apple Podcasts, Spotify, YouTube, ACX and broadcast targets.
- [Video Deinterlace](https://elysiatools.com/en/tools/video-deinterlace): Remove interlacing artifacts from video to convert interlaced video to progressive scan

## Samples

- [Copyright-Free FLAC Audio Samples](https://elysiatools.com/en/samples/flac-samples): Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
- [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
- [Copyright-Free WAV Audio Samples](https://elysiatools.com/en/samples/wav-samples): Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
- [Copyright-Free Raw PCM Audio Samples](https://elysiatools.com/en/samples/pcm-samples): Raw PCM s16le audio samples featuring nature ambience and relaxing music for waveform, playback, and conversion workflows