anyways, everyone should know about KodyTools.
it's a website with a collection of online tools; everything from math, finance, writing/text, science, coding, date/time, et cetera. and not just one or two for each category either! there are over 200 tools on this website. it's just absolutely fantastic; it's also an easy website to navigate + it's really simple to use all the tools! they also explain each one~
also it's free + there is only one singular ad, as far as i can tell, just the single banner at the top of the page. so you won't have to deal with annoying ad pop ups constantly.
i actually found it because of their text tools, specifically their combination generator + their sort lines generator (it's actually how i got all the combinations for my TF picker wheel)! i also recently found their empty lines remover which has been a lifesaver~
some (but not all) other ones they have: