TikTok: cap the video volume
Keeps every video volume at a comfortable 40% to avoid uncomfortably loud clips.
Code to copy
// Cap every video volume at a comfortable 40%
const CAP = 0.4;
function capVolume() {
document.querySelectorAll('video').forEach(function (v) {
if (v.volume > CAP) { v.volume = CAP; }
});
}
capVolume();
const obs = new MutationObserver(capVolume);
obs.observe(document.documentElement, { childList: true, subtree: true });
document.addEventListener('volumechange', function (e) {
if (e.target && e.target.tagName === 'VIDEO' && e.target.volume > CAP) {
e.target.volume = CAP;
}
}, true);How to use this example
- Copy the code with the button above.
- Install JustZix (2 minutes) and open the extension on the target page.
- Add a new rule matching that page.
- Paste the code into the rule's JavaScript panel and save — it runs on every page visit.
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