Upload an audio file and raise its volume so the loudest peak sits just under full scale. The file is read twice: once to measure, once to scale.
Your file never leaves your device. All processing happens right in your browser, and nothing is uploaded to a server.
The tool scans your file for its loudest peak, then raises the whole recording so that peak sits just below full scale. You get the maximum clean volume the recording allows, with zero clipping, because the gain is calculated rather than guessed.
This is peak normalization: it matches maximum levels, not perceived loudness. Two files normalized to the same peak can still feel different in loudness if their dynamics differ.
Quiet voice memos and interview recordings before sharing or transcription, lecture audio recorded from the back of the room, and collections of clips that need a consistent maximum level before merging into one file.