This is an online generator which converts normal text letters into tiny letters which you can copy and paste into facebook, twitter, instagram and other social media posts and status updates. It essentially allows you to make text smaller. The text looks so small because three special unicode alphabets are used. This is why you can copy and paste it! You wouldn't be able to do that if it were a tiny font.
The three alphabets created in this mini text generator aren't actually "official" alphabets in unicode, which is why some characters are missing, and some look weird. The small caps alphabet is the most "complete" alphabet of small letters available. This is probably why you see small caps on Tumblr, on Twitter, on Facebook and elsewhere on the internet. The only letter which is slightly weird is the "f" character. which gets converted into "ғ".
The second alphabet is a set of tiny superscript characters. These are used very often in math notations and so Unicode thought it would be good to have official text symbols for these chatacters. Unfortunately there is not a superscript letter for "q" and "i", so approximate replacements had to be used. Still, the unicode superscript alphabet is probably the best and smallest letter alphabet available, so it's a great way to make your text stand out in your social media posts.
The third alphabet is a subscript alphabet, and as you might have noticed, it's lacking quite a few letters for which there is no reasonable replacement. Perhaps at some point in the future unicode will include the remaining subscript letters in their spec, but until then, generating a full set of unicode subscript letters is off the table.
So yeah, if you're looking for a tiny letter generator then hopefully one of these tiny alphabets will work for you. If you end up using this generator for one of you Tumblr posts, Twitter posts, or wherever, feel free to throw a link in the comments so others can check it out!
Also, I'm definitely open to requests if people want other sorts of translators made, so please leave any suggestions in the comments or in the suggestions box. Thanks for using my little online tool :)