Google Reverse Search, available at reverse.photos, lets you search by images instead of keywords. Upload a picture from your desktop, tablet or mobile phone, and Google will show all the other web pages on the Internet that have similar images.
Reverse Search is useful for verifying the source of photographs, WhatsApp images, screenshots and memes. Tinder and Facebook users have used "Search by Image" to research profile pictures of their potential dates, travellers use it for finding the photo's location while matrimonial sites use reverse search to detect fake uploads.
The images are hosted anonymously on the Internet and cannot be discovered by other users.