Make quiet audio properly loud. Drop in a file and Solmi shows you how much headroom it has, boosts it by as much as you want, and holds the peaks under a safe ceiling with a real limiter so louder does not turn into distorted. Runs entirely in your browser — no upload, no signup, and your audio never leaves your device.
Drop the file in and Solmi measures its peak and average level. Use Auto level to apply the largest boost the track can take without touching the ceiling, or set the amount yourself in dB and preview the result before downloading. Everything runs on your device.
Not the way a plain gain control would. Raising the level past the ceiling normally clips the waveform flat, which is what makes loud audio sound crunchy. This tool runs a limiter that pulls the gain down for the instant a peak would overshoot and releases it smoothly afterwards, so the loud parts stay clean. Very extreme boosts will still audibly squash the dynamics — that is the limiter working, not a bug.
Start with Auto level, which uses up the track's available headroom exactly and is always safe. Beyond that, a few dB more will sound louder and denser; past roughly 10 dB over Auto you are trading dynamics for loudness, and quiet passages will start to be pulled up along with everything else.
Usually the input gain was set too low when it was recorded, which leaves the whole waveform sitting far below the ceiling. Boosting raises the audio back up, but it also raises whatever noise was recorded with it — a hissy room or a bad mic will sound hissier once it is loud enough to hear.
MP3, WAV, M4A, AAC, OGG, and FLAC — anything your browser can decode. You can download the result as an MP3 or as an uncompressed 16-bit WAV.
Yes, completely free with no signup and no watermark. Once your track is at the right level, you can turn it into a music video with Solmi's AI music video generator — also free to start.