Unless I missing something, there are a ton of open source client side encrypted pastebins around. E.G: 0bin.net (https://0bin.net/ https://0bin.net/), with a

Unless I missing something, there are a ton of open source client side encrypted pastebins around. E.G: 0bin.net (https://0bin.net/ https://0bin.net/), with a lot of good faith in the FAQ (https://0bin.net/faq/ https://0bin.net/faq/), a basic and open source code (https://github.com/Tygs/0bin https://github.com/Tygs/0bin), zero JS stats on the main instance and alternative instances already in the wild. It does feature self destruct.