Safe Scanner is a simple, slim (350kb) web app which shows URL redirects, checks https and validates against Google Safe Browsing for scanned links. It also keeps a history which you can share.
There are other apps out there but they are bloated and slow. Hope this helps someone.
My Android phone camera can scan QR codes but it's horribly slow to start up and doe only shows a truncated URL, so you don't know where the link takes you.
There are apps which check the URL but they are also bloated and slow. I only need a scanner which checks the URL and saves my history so I made this for myself.