Audio Normalizer
Peak-normalize audio to maximum clean volume in one click.
About this normalizer
One click: the tool finds your file's loudest sample and scales everything so it sits exactly at the target — 0 dB maximum, −1 dB for encoding headroom, or −6 dB for mixing room. The gain applied is reported in dB, and relative levels within the file are untouched.
Peak vs loudness — the honest distinction
Normalization means two different things and mislabeling them causes real disappointment, so: THIS tool is a peak normalizer — it matches ceilings. Every file comes out with its loudest instant at the same level, which is the right tool for maximizing a quiet file cleanly and for batch-prepping clips so none of them clips downstream. What it deliberately isn't: LOUDNESS normalization (LUFS), which matches perceived average volume — the thing streaming platforms do, and why Spotify tracks all feel equally loud. The difference bites in one classic case: a quiet recording with a single loud pop won't get louder from peak normalizing, because the pop already touches the ceiling — trim the pop first (the trimmer) or cut it with the silence remover, then normalize. The −1 dB preset earns its place: MP3 and AAC encoding can overshoot peaks slightly, so mastering practice leaves a hair of headroom before compression. The booster is this tool's manual sibling with a live clipping meter.
Frequently asked questions
What does normalizing actually do?
Finds the loudest sample, scales the whole file so that sample hits the target level. Everything rises (or falls) by the same gain — internal dynamics are perfectly preserved.
Why didn't my quiet file get louder?
Something in it — a pop, a click, one shout — already touches the ceiling. Peak normalizing can only scale until the loudest instant hits maximum; trim the outlier first, then normalize.
When should I use −1 dB instead of maximum?
When the file will be encoded to MP3/AAC afterwards — lossy encoding can overshoot peaks slightly, and the 1 dB of headroom prevents intersample clipping. It's standard mastering practice.
Is this the same as what Spotify does?
No — platforms use LOUDNESS normalization (LUFS), matching perceived average volume. Peak normalization matches ceilings. Both are real; this is honestly the second.