Audio Normalizer — Consistent Loudness
Bring every track to the same peak level.
Runs 100% in your browser — nothing is ever uploaded.
What is Audio Normalizer?
Normalize audio to a consistent peak level so quiet tracks match loud ones. Free, private, 100% in your browser — WAV export. Upload an audio file, tune the settings, preview the result and download it as a WAV file. No installation, no account and no upload: the whole process happens client-side in your browser, which keeps your data 100% private.
How to use Audio Normalizer
- Open Audio Normalizer — it supports MP3, WAV, OGG, M4A and FLAC.
- Upload your audio file; it is decoded locally in your browser.
- Tune the settings, then click Process to render the result.
- Preview the output and download it as a WAV file.
Frequently asked questions
What peak level should I normalise to?
−1 dB is the sensible default: it uses nearly all the available range while leaving a sliver of headroom, so later lossy encoding to MP3 or AAC cannot push samples over the ceiling. Choose −3 dB or −6 dB if the file will be processed further, and only pick 0 dB for a true final master, since intersample peaks can still clip on some players.
Why do two files normalised to the same peak still sound different in loudness?
Because peak and perceived loudness are not the same thing. A heavily compressed pop track sits close to its peak almost constantly, while an orchestral recording touches its peak once and averages far below it. Both can peak at −1 dB and differ by 10 dB or more in how loud they seem. Peak normalising is the right tool for preventing clipping, not for matching how loud things feel.
Does normalising improve audio quality?
No — it applies one uniform gain to every sample, so the relationship between signal and noise is unchanged. A quiet, hissy recording normalised loud is simply a loud, hissy recording. What normalising does well is make a set of files consistent so a listener is not reaching for the volume control between tracks.
Are my audio files uploaded?
Never. Your file is decoded and processed with the Web Audio API directly in your browser. It never touches a server — processing even works offline.
What formats can I upload and download?
Upload anything your browser can play: MP3, WAV, OGG, M4A/AAC and FLAC in most browsers. The processed result downloads as a high-quality WAV file.
Is it really free? Any length limit?
Completely free with no watermark. There is no hard length limit — a typical 3-5 minute song processes in seconds; very long files just need more memory.