I tried the blockchair site on another computer and the cam worked. So it must have been the previous machine. Once again, thanks to all for the suggestions.

Thanks for those helpful answers. Unfortunately, Blockchair could not read my qr code via the inbuilt cam. Are there any other site where I can scan the code via the cam to check the balance? 

Hello

A while ago I could enter my paper wallet 'share address' via a qr code onto a site which then told me how much I held on that wallet.
I think it was on Blockchaininfo/blockchain.com?

I cannot see where to do this on this site any more.

Is there anywhere I can use the share address on my wallet securely using the qr code? 

I can see some warnings against this but I am confused as surely the public address is secure to share?

I do not have a smart phone and use the cam on my computer.

Thanks.