thanks for all the answers.

most answers are obvious post-count-hunters who have no idea what they are talking about.

the converter clearly states in bold red letters:

Download this one-file-html-app and run it offline for best security!
Never paste private keys into unknown websites!

this is how i do it:

i run this html-js-app on an offline linux computer which i boot from a usb stick into a virgin operating system.

then i run the key converter.

then i write up the public addresses and send funds to these.

this way the private key never even has a chance to reach the internet.

for me this is ideal.

i generated 1 private key which i use for both: bitcoin and ethereum networks.

i put some money on these 2 addresses regularly as a saving for my kids.

this way i have to only inherit 1 private key to my kids.


if you have a windows-10 computer which you use to run all kinds of games, warez and browser-plugins, then handling a private key is ofcourse troublesome.