Do you upload my video?
No. Volume processing runs locally in your browser.
Change MP4 Video Volume
Adjust MP4 video volume and export locally — no uploads.
Frequently asked questions
Will boosting volume reduce quality?
Boosting can cause clipping if pushed too far. Keep gain moderate for clean results.
Does this change the video track?
We focus on the audio track. Video may be copied or remuxed depending on the output container.
Why does this take time?
Changing volume requires decoding and re-encoding the audio track.
Which browsers are supported?
For best results, use the latest Chrome / Edge with WebCodecs support.
Which formats are supported?
Common inputs include MP4/WebM/MOV/MKV. Output supports MP4/WebM/MOV/MKV.