My webpage suddenly isn't working - ERR_TOO_MANY_REDIRECTS message

Browsing History is not Cookies, so you might not have deleted the right thing.

Cookies are stored in Safari -> Settings -> Privacy -> Manage Website Data

If that doesn't help, then can you try a different browser? If it still doesn't work, it's likely something server-side that's causing the problem

"Too many redirects" is the result of a self-referencing link. Usually, the cause is an advertisement hosted by your website. We really can't help with that. Try eliminating that code.