I mean, you can make a cookie that is anything you want, but browsers accept what they accept. For Chrome that's a <4kb cookie with a max-expiration of 400 days

I mean, you can make a cookie that is anything you want, but browsers accept what they accept. For Chrome that's a <4kb cookie with a max-expiration of 400 days. I think localStorage being slightly better or worse than a local cookie is up for discussion. I just think you're weird if you think local cookies are bad but localStorage is good.