if not open it in a 'picture editor' i.e. PaintShop - or Infranview (free download) and save as JPG - or if it is a jpeg - you can save it with options and slide scale to lower resolution - or image resize - plenty of scope for your choice
What is ransomware and how do I protect my PC from WannaCry?
What I learned from my mentor, Oscar-winning VFX supervisor Phil Tippett
Siri vs Google Assistant
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.