Do you upload my video?

No. Volume processing runs locally in your browser.

Will boosting volume reduce quality?

Boosting can cause clipping if pushed too far. Keep gain moderate for clean results.

We focus on the audio track. Video may be copied or remuxed depending on the output container.

Changing volume requires decoding and re-encoding the audio track.

For best results, use the latest Chrome / Edge with WebCodecs support.

Common inputs include MP4/WebM/MOV/MKV. Output supports MP4/WebM/MOV/MKV.

Boost or lower any video's volume — free, instant, with live preview in your browser. Drag the slider and hear it change. No upload, no sign-up.