Loudness Units relative to Full Scale — a perceptual loudness measure standardized as EBU R128. Streaming platforms use it to match loudness across tracks.

What target should podcasts use?

Most podcast platforms aim for -16 LUFS integrated. Apple Podcasts and Spotify tolerate -14 to -19 LUFS without significant playback gain adjustment.

Why not just use the volume normalizer?

Peak or RMS scaling does not match perceptual loudness. Two quiet tracks can have the same peak but very different perceived loudness; LUFS fixes that.

Loudness Normalizer (EBU R128 / LUFS)

Loudness NormalizerServer

Normalize audio loudness to a target LUFS using the EBU R128 standard — the industry standard for streaming, podcasts, and broadcast.

Drop an audio file here

or click to browse

What is LUFS?

LUFS (Loudness Units Full Scale) measures perceived loudness — how loud audio actually sounds to the human ear, not just the peak signal level. The EBU R128 standard defines how to measure and normalize loudness so that different tracks, episodes, or segments play at a consistent volume.

Streaming platforms like Spotify and Apple Music normalize uploaded tracks to around -14 LUFS. If your audio is louder, it gets turned down. If it's quieter, it stays quiet (or gets boosted, depending on the platform). Targeting the right LUFS upfront gives you control over how your audio is presented.

Common targets

-14 LUFS — Spotify, Apple Music, YouTube, Amazon Music
-16 LUFS — Apple Podcasts, most podcast platforms
-23 LUFS — European broadcast (EBU R128)
-24 LUFS — US broadcast (ATSC A/85)

LUFS vs. peak normalization

Peak normalization (like the Volume Normalizer) adjusts volume based on the loudest sample in the file. This doesn't account for how loud the audio sounds — a track with one loud transient and mostly quiet content will measure the same as a consistently loud track. LUFS measures integrated loudness over time, weighting frequencies the way human hearing works, so the result actually sounds consistent.

Need something simpler? If you just want to make a file louder or quieter without worrying about LUFS standards, try the Volume Normalizer — it does peak/RMS normalization entirely in your browser, with no upload required.

⎆Processed on our servers. Files are deleted immediately after processing.

How to use Loudness Normalizer

Drop your audio
Any format ffmpeg can read works.
Pick a LUFS target
Use a preset — -14 LUFS for streaming, -16 for podcasts, -23 for broadcast — or type a custom value.
Submit
The server runs the ffmpeg loudnorm filter in two-pass mode for accurate EBU R128 measurement.
Download
Save the normalized file. Loudness will match the target ±0.5 LU.

Frequently asked questions

What is LUFS?: Loudness Units relative to Full Scale — a perceptual loudness measure standardized as EBU R128. Streaming platforms use it to match loudness across tracks.
What target should podcasts use?: Most podcast platforms aim for -16 LUFS integrated. Apple Podcasts and Spotify tolerate -14 to -19 LUFS without significant playback gain adjustment.
Why not just use the volume normalizer?: Peak or RMS scaling does not match perceptual loudness. Two quiet tracks can have the same peak but very different perceived loudness; LUFS fixes that.