Little web page will generate self hosted certificates for you - https://zerossl.com/free-ssl/#self
Nice TLS/SSL tester - has custom TCP/IP port option - https://ssldecoder.org/
Free service that tests your site's certificate expiry: https://certificatemonitor.org/
tags: ssl, tls, certs
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OLD:
Encryption. Secrets aren't necessarily bad. It's a good idea to keep critical info encrypted in case your PC gets hacked. There are enough credit card numbers floating around cyberspace, I don't want mine out there too.
For Win9x I\'ve use Scramdisk. Now discontinued, but the binaries are still available (it was open source).
For WinNT/2000/XP google for PGPDisk, there is a free version out there (some kind of pre-commercialization fork, IIRC). (It's not from the main PGP site, which sells a commercial version... don't have the link handy just right now.)