This is a simple console app for converting bitcoin's P2PKH addresses to P2SH-P2WPKH created as per request here.
Just enter your address starting with 1 and the app will automatically convert it to a SegWit address starting with 3.
Run by calling dotnet AddrConverter.dll

Download the correct version of .Netcore based on your OS from here: https://dotnet.microsoft.com/download

Disclaimer:
The RIPEMD160 functions are copied from .Net framework's source code since .Net core no longer has these functions. Please refer to .Net framework's source code for the license.