This method will unsubscribe all the subscribed YouTube channels on your account at once. Therefore, proceed with this method only if you want to clear all the subscriptions.

Here is how to mass unsubscribe on YouTube at once:

1. Open any web browser on your desktop or laptop and open youtube.com

2. Navigate to Subscriptions > MANAGE.

3. A list of all the channels subscribed from your account will be displayed.

4. Scroll down till the end of the page and right-click anywhere on the empty space.

5. Select Inspect option.

How-To-Unsubscribe-From-All-YouTube-Channels

6. A new window will appear on top of the bottom of the Manage Subscriptions page. Here, switch to the Console tab, which is the second tab in the list.

7. Copy-paste the given code in the console tab. Refer to pic below.

How-To-Unsubscribe-From-All-YouTube-Channels

(async function iife() {
var UNSUBSCRIBE_DELAY_TIME = 100
var runAfterDelay = (fn, delay) => new Promise((resolve, reject) => {
setTimeout(() => {
fn()
resolve()
}, delay)
})
var channels = Array.from(document.getElementsByTagName(`ytd-channel-renderer`))
console.log(`${channels.length} channels found.`)
var ctr = 0
for (const channel of channels) {
channel.querySelector(`[aria-label^='Unsubscribe from']`).click()
await runAfterDelay(() => {
document.getElementsByTagName(`yt-confirm-dialog-renderer`)[0] .querySelector(`[aria-label^='Unsubscribe']`)
.click()
console.log(`Unsubsribed ${ctr + 1}/${channels.length}`)
ctr++
}, UNSUBSCRIBE_DELAY_TIME)
}
})()

8. After pasting the above code into the console section, hit Enter and wait for the process to complete.

9. Finally, your subscriptions will start to disappear one-by-one.

Note: Try this updated method to unsubscribe from all YouTube channels if above code does not work.