Recently I needed some custom items like a pickaxe than can only break oak logs if you need a custom item well you are in luck because I found a website which creates a command and gives you the item you specified you can edit the name, damage, enchants and a bunch of other stuff. It also can create mobs and supports up to 1.14 with a vast amount of commands like /give /summon
/effect /tellraw /playsound and a couple more. Anyway, I thought this might help some people create custom things without having to download anything because it is entirely in the browser but okay enough chat. If you have read this far please stop now.

MCStacker links (the actual thing)

MCSTACKER 1.12.2 https://mcstacker.net/1.12.php
MCSTACKER 1.14 https://mcstacker.net/

I DID NOT make this PyroStunts did link to his stuff here:
tweeter: https://twitter.com/PyroStunts
discord: https://discordapp.com/invite/WCb6GNf
patreon: https://www.patreon.com/mcstacker
Youtube: https://www.youtube.com/channel/UC7XCzkwZdoaZA9UmpeFSxvw