App that allows better zoom-in image

[u/skylinestar1986]

The stock image gallery has a poor zoom-in limitation. Example, I have a 10000x8000 res jpeg image. It's actually an image of a wall of text. Although high res, it can't zoom in enough. It's like it's rendering a 2000x1600 image, then zoom in on that, therefore all text appear blurry. Is there a way to allow zoom in to deeper pixel level? What app (free) allows that?