When you send a screenshot (even if height/width only is cropped) , the screenshot’s width and height can be used to find the iPhone model of someone or narrowed down.
The most unique sized iPhone on the market right now is the iPhone 16 Pro and iPhone 16 Pro Max, as no other phone has the same width and height. So if you send a screenshot people will 100% know your exact phone. The regular iPhone 16 is common with the rest of the other phones and not unique.
If you send a screenshot from a iPhone XR, people can know if you using an iPhone 11 or iPhone XR since they have the same dimension which narrows down alot of options. (828x1792)
You can use this site here to view a list of all the dimensions. Click the iPhone’s tab and sort the physical width or height.
If you don’t want to expose your phone model, crop both width and height of each screenshot randomly. I would suggest cropping out the top of the phone as it shows your time if you care about that. Some sites like X have random inaccurate dimensions in uploaded screenshots, which is different from the original raw screenshot.
I haven’t really checked with android phones, but it’s probably the same thing.
If you go to a website your phone reports its model number to that website. If it doesn’t then that website can (and often does) use javascript to figure out what model it is with, among other things, viewport size.
Unless you have taken the time to turn it off, your phones model is embedded in the metadata of the screenshot you took.
Before anyone takes action based on this post, consider critically weather your device and usage pattern merit concealing your phone model from people or other entities.
It doesn’t know your device model but it knows you’re using an iPhone, but yes it can use the width of the viewport size to narrow down just like a screenshot but It does not matter as much if you have a more common sized iPhone rather than having a iPhone 16 Pro Max which is completely unique. Most likely there are other alternative browsers that spoof the viewport size for iOS, like letter boxing in Firefox.
I just talked about screenshots as they are shared all the time and some people might not want other people to know what type of phone they are currently using, just general privacy.
For iOS devices, the model is not included in the metadata of a screenshot