Without any boring intro, let me get straight to the point.
1 – Go to this link
2 – Right-click and go inspect then go to console

3 – Now copy the below script and paste it on the console

function youtubeUnsubscriber() {
var count = document.querySelectorAll("ytd-channel-renderer:not(.ytd-item-section-renderer)").length;
var randomDelay = 500;
if (count == 0)
return false;
function unsubscribeVisible(randomDelay) {
if (count == 0) {
window.scrollTo(0, document.body.scrollHeight);
setTimeout(function() {
youtubeUnsubscriber();
}, 10000)
}
unsubscribeButton = document.querySelector('.ytd-subscribe-button-renderer');
unsubscribeButton.click();
setTimeout(function() {
document.getElementById("confirm-button").click()
count--;
console.log("Remaining: ", count);
setTimeout(function() {
unsubscribedElement = document.querySelector("ytd-channel-renderer");
unsubscribedElement.parentNode.removeChild(unsubscribedElement);
unsubscribeVisible(randomDelay)
}, randomDelay);
}, randomDelay);
}
unsubscribeVisible(randomDelay);
}
youtubeUnsubscriber();

4 – Hit enter and wait for some time to see the magic

After all are done, refresh the page.
