I just convert it to QR code using some open source QR code generator and of course,  I've run it offline and save it as a PDF file then encrypt it with a strong password, then upload it on some trusted app online, I will not store it on a paper since there are possibilities that this paper will lose including some important files when something happens like a typhoon or some disaster (just in case) since I'm living here in a tropical region/country so I just uploaded it online and I feel it's safe there.