Video Volume Adjuster

Boost or lower video volume with a slider — preview first, then export. Processed in your browser, never uploaded.

Click to choose a video, or drag it here

Supports MP4 / WebM / MOV / MKV, etc.

Max file size is 2GB. Larger files may process slowly — compress first if needed.

The first run loads an ~30MB FFmpeg engine from CDN, then it is cached. Video is preferably stream-copied; audio is re-encoded. Full re-encode is used as a fallback.