If you need to convert your npub or nsec key to hexadecimal format, there are some tools and sites. Ours is one that we invite you to try.
Thanks for your bost!
Discussion
You should be converting locally on CLI with something like key-convertr or similar
Yes, the best option is to do it locally with a client, I didn't know any, and the javascript used for it could also be downloaded and run offline.
My skills as a programmer don't reach them yet, but I will look for a way to enable them.
Thanks for the comment, which is definitely the right one. 🙏