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To search by URL, you can insert a page URL or an image URL. Just paste the address of the page or image that you would like to search.
This is an example of an image URL
And this is an example of a page URL: https://commons.wikimedia.org/wiki/Commons:Featured_pictures/Astronomy
You can also paste a whole domain URL: http://blog.tineye.com
Please Note: If you search for a page or domain URL that contains more than one image, TinEye will ask you which image it is that you want to search for. Just click on the one you want.