Google Reverse Image Search helps you quickly discover visually similar images from around the web. Upload a photograph from your desktop to Google Images and it will show you related images used on other websites and also different sizes of the same photo almost instantly.
Journalists can use the reverse search option to find the original source of an image or to know the approximate date when a picture was first published on the Internet. Photographers can use ‘search by image’ feature to know about other websites that are using their photographs without permission.
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Google’s search by image feature is currently available for desktops and not your iPad or mobile phone.
Thus, if a friend has sent you a forwarded image on WhatsApp or Facebook that you’d like to verify, you’ll have to first transfer the photograph to a desktop and then perform a reverse image search.