Volume Normalizer

Normalize loudness to LUFS targets using the loudnorm filter. Includes presets for YouTube / Spotify / podcast.

Fully local processing — your file never leaves the browser

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Drag & drop audio/video, or click to select

Supported: MP3, AAC, WAV, MP4, MOV, MKV, etc. / Max 500MB

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Normalization Preset

Podcast

-16 LUFS

Apple Podcasts &
Spotify standard

YouTube

-14 LUFS

YouTube loudness
recommendation

Custom

Any LUFS

Set your own
target values

Integrated Loudness (I)

Unit: LUFS (e.g. -16)

LRA (Loudness Range)

Recommended: 11 (default)

True Peak (TP)

Unit: dBTP (e.g. -1.5)

Output Format

▶ Equivalent FFmpeg Command

Processing… 0%

Download Normalized File

Popular uses

Fix uneven loudnessTune volume for YouTubeMake speech easier to hear

Next tools

Audio Extractor Add BGM / Audio Mix Tool Mute Video Tool

What this tool does

Platform presets
Custom LUFS / true peak
Local processing

How to use

1
Pick a file
Video or audio.
2
Pick a preset
YouTube / Spotify / Podcast / custom.
3
Normalize
Output is loudness-aligned.

What each setting means

I (LUFS)

Loudness target. YouTube ≈ -14, podcast ≈ -16.

TP (True Peak)

Instant peak ceiling, typically -1.0 to -1.5 dBTP.

LRA

Loudness range (dynamic range).

Recommended settings

YouTube

I=-14 / TP=-1.0

Matches YouTube's playback normalization.

Podcast

I=-16 / TP=-1.5

Apple / Spotify guideline.

EBU R128 broadcast

I=-23

Legacy EBU broadcast standard.

Common pitfalls

Symptom: Audible clipping

Cause: TP near 0dB.

Fix: Set TP ≤ -1.0dBTP.

Symptom: Quiet voice + loud music

Cause: LRA too high.

Fix: Lower LRA to ~7 to compress dynamics.

Equivalent FFmpeg commands

Reference commands you can run on the desktop FFmpeg CLI.

YouTube target

ffmpeg -i input.mp4 -af loudnorm=I=-14:TP=-1.0:LRA=7 -c:v copy output.mp4

Podcast target

ffmpeg -i input.mp3 -af loudnorm=I=-16:TP=-1.5:LRA=11 output.mp3

Browser support & limits

Video stream is copied where possible
Very short clips give unstable LRA

Privacy

This tool runs ffmpeg.wasm directly in your browser. Files never leave your device — everything runs locally. Read the privacy policy →

Frequently asked questions

Why normalize at all?

YouTube / Spotify auto-adjust playback to a target loudness. Pre-normalizing avoids surprise volume drops.

1-pass vs 2-pass?

2-pass measures first then applies — more accurate. This tool uses a 2-pass-equivalent flow.

What is EBU R128?

European Broadcasting Union loudness standard at -23 LUFS.

Related tools

Related FFmpeg recipes

What to do next

Command Reference

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