Bookmarklets I decided were cool made by me
Note: This works on most browsers but some do not support bookmarklets. It also won't work on sites where bookmarklets are blocked (like codepen or github)... If you ever need to run any bookmarklet without internet or on a blank webpage that does not show up in your history, go to about:blank on your browser and run the bookmarklet.
6. Paste the code into the url bar, either with ctrl+v or ctrl+shift+v or left clicking and hitting paste.
"Datamarklets" are websites embedded into data: so you can acess it without internet, although it shows in your history. It works just like a link - so the website you are currently in will be replaced, unlike about:blank bookmarklets.