Drop a quiet recording and boost the volume — with a clip guard on by default, so it gets louder without distorting. Everything runs in your browser; nothing is uploaded.
📖 Read the full guide: How to make audio louder without distortion →
Yes — completely free, with no sign-up, no watermarks, and no limit on how many files you process.
Not with Prevent clipping on (the default): the boost is capped so the loudest peak stays just under 0 dB. Turn it off only if you want maximum loudness and accept possible clipping.
No. Analysis and processing happen locally in your browser, so your audio never leaves your device.
The Normalizer auto-levels to a target loudness; the Volume Booster gives you a manual gain slider to make a file as loud as you want (clip-safe).
Whatever your browser can decode — MP3 and WAV work everywhere, with M4A, OGG and FLAC where supported. The result is saved as MP3 or WAV.