>>997183you can go directly to
https://yandex.com/images/in the search box on the right side there is an icon that looks like a camera, when you click on it you have the option of uploading a file from your device or entering a url of an image (if you want to do the url method you can right-click an image and select "copy image location" then paste it)
if you want to reverse images from 4chan easily, i suggest you install the 4chan X script on your browser, so that you can just click a link on the post and it will upload the image to yandex for you
