My go-to for this is jisho, although it completely fails to be usable on phones. I've more recently started just using the google IME handwriting input, which

My go-to for this is jisho, although it completely fails to be usable on phones. I've more recently started just using the google IME handwriting input, which is using some ML magic that lets it be extremely fuzzy about stroke order/count, relative placement, etc and I think must incorporate some sort of image/bitmap based recognition that many ones do not. E.g. you can I imagine it wouldn't be as useful for chinese, but for Japanese is works quite well. You can use it on android and on the google translate website.