Question 1

What does this audio normalizer do?

Accepted Answer

It analyzes the loudness of an audio file (in LUFS or peak dB) and applies gain so the output matches a target level. You can also simply boost volume by a fixed amount in dB.

Question 2

Which audio formats are supported?

Accepted Answer

MP3, WAV, OGG, M4A, AAC and any other format your browser can decode with the Web Audio API. Output is always encoded to WAV for maximum compatibility.

Question 3

Is the audio data private?

Accepted Answer

Yes. Decoding, analysis and re-encoding all happen locally in your browser using the Web Audio API. No audio is uploaded to any server.

Question 4

What is LUFS normalization?

Accepted Answer

LUFS (Loudness Units Full Scale) is the modern broadcast and streaming standard for perceived loudness. Targeting -14 LUFS matches Spotify and YouTube, -16 LUFS matches podcasts, -23 LUFS matches broadcast TV.