Hi Everyone!

I was always good at taking photos but I recent joined an online course to improve this skill. Although I am using my smartphone to take photos and later, I print them. But soon, I will purchase a good digital camera to improve my photography. However, I am here to get a suggestion.

I am looking for an online ruler that can easily measure the size of my printed photos and pixels of my online images. In this regard, my friend recommended me this tool https://ruler.onl/ that works very good for printed photos but I am not sure how I will measure the pixels with it.

I would be grateful if you share any tutorial to know how I can measure my images' pixels. Or you can also advice any other online tool. I am waiting for your responses.