Bookmarklet

Drag this button to your bookmarks bar:

y2mate.space

How to use it

1. Install the bookmark as described above.
2. Open any YouTube video in your browser.
3. Click the bookmark. The converter opens in the same tab with that video already loading — press MP3 or MP4 as usual.

If drag-and-drop does not work

Create a bookmark manually and paste this as its address:

javascript:(function(){var m=location.href.match(/(?:youtu\.be\/|v=|shorts\/|embed\/|live\/)([a-zA-Z0-9_-]{11})/);location.href=(m&&location.hostname.indexOf('youtube')>-1)?'https://y2mate.space/#'+m[1]:'https://y2mate.space/';})();

Good to know

The bookmarklet only forwards the address of the video you are watching. It cannot see or change anything else on the page, it only runs when you click it, and removing it is just deleting one bookmark. On phones, bookmarklets work best with the manual method above, since most mobile browsers do not support drag-and-drop.