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Just a small suggestion, clicking to see the difference on the demo images wasn't clear at first. Maybe you should use one of those sliders that they use for before/after images. I think that would be better UX.

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I think that kind of drives the point home. Maybe it's my display or my vision, but I still can't tell a difference between the "Before" and "After" pictures. That's very impressive to me, looking at the compression ratios.

The only way I could make it fairer is to add a magnifying area zooming to 100% but that would be too much work. Hoping that links to images is enough.

I discarded the idea of using a sliding divider because it cannot switch images fast enough to notice tiny compression artifacts, if any.

But thanks for your feedback. I have a couple of ideas how to make it more clear.

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