I use a combination of multiple answers I see here.
<a href='data:text/html;charset=utf-8,<html><head><meta http-equiv="refresh" content="0;url=http://www.google.com/"></head><body><a href="http://www.google.com/" rel=noreferrer>Open Link</a></body></html>' rel=noreferrer target=_blank>A link without referer</a>
I tested with Firefox, Chrome, iOS Safari, and Samsung Android default browser. And it works.
Even if a browser sends a referrer, it will not be the website since the page address is "data:...". That's why it is much safer than creating a page that does this.