Make it louder. Boost a quiet recording or normalize a song to −14 LUFS, without clipping.

Questions

Why not just turn the gain up?

Past the loudest peak, extra gain clips: the waveform is cut flat and crackles. A limiter turns down only the moments that would clip, for a few milliseconds each, so the rest of the file gets the full boost.

What's the difference between boosting and normalizing?

Boosting adds the same gain to any file. Normalizing measures how loud the file sounds (integrated LUFS) and sets the gain to hit a target, so different files come out at the same loudness. Normalizing can turn a file down, too.

What LUFS should I normalize to?

−14 LUFS matches what Spotify and YouTube play at, −16 suits Apple Music and podcasts, and −23 is the EBU R128 broadcast standard. Pushing much louder than −14 needs heavy limiting and, on streaming services, is turned back down anyway.

Will a big boost sound bad?

A few decibels of limiting is usually transparent. Ten or more on dense music flattens the punch of drums, and boosting a noisy recording raises the noise too — clean it first with the free Noise Reducer.

Is it free, and is my audio uploaded?

Free, with no sign-up. The file is processed inside your browser and never leaves your device.