General Screen capture file size iOS 11

[Act3]

i just took a screen capture of my iPad Pro 9.7 screen and the file size was almost 9 megabytes. Is that normal? I don’t recall them being that large before.

 

[zorinlynx]

i just took a screen capture of my iPad Pro 9.7 screen and the file size was almost 9 megabytes. Is that normal? I don’t recall them being that large before.

Screen captures are in PNG and will vary widely in size depending on the compressibility of what's on the screen.

Unlike JPG which is good at compressing smooth tonal changes, PNG is best at compressing large areas of the same color, geometric shapes, and so on; the sort of thing usually found in screenshots. If your screenshot had a photograph in it, that would explain the size. To compare, open Safari to a blank (white) page and take a screenshot; it should be tiny.

PNG is lossless so the screenshots always look exactly like your screen did you when you take them. If screenshots used JPG they'd look lousy.

 

[Act3]

Screen captures are in PNG and will vary widely in size depending on the compressibility of what's on the screen.

Unlike JPG which is good at compressing smooth tonal changes, PNG is best at compressing large areas of the same color, geometric shapes, and so on; the sort of thing usually found in screenshots. If your screenshot had a photograph in it, that would explain the size. To compare, open Safari to a blank (white) page and take a screenshot; it should be tiny.

PNG is lossless so the screenshots always look exactly like your screen did you when you take them. If screenshots used JPG they'd look lousy.

It was a screenshot of my homescreen with nothing open. I have a issue with the dock getting stuck out of place and wanted to capture it.

I just took similar screen capture of my air 2 homescreen which is on iOS 10 and the file size was 4.6 megabytes, about half the size of iOS11.
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This capture was 9.5 megabytes and macrumors would not take the upload. I had to email it to my desktop using my ipad email program to reduce the file size in order for the upload to work.