Rev. Dr. Rainy F. A., DDiv

Web: https://yal.cc/tools/cohost/reveal-generator/

Here's what you get:

↔

👀

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Template by YellowAfterlife.
Dragging might not work with touch!

So you have two images and you reveal the second one by dragging a handle or clicking/tapping on the corner button (since it can be hard to tap+hold the right spot on mobile).

In existing media I've mostly seen this used for before/after pictures in marketing, but I think there's more to explore here - for example, you could let the reader compare day/night versions of a scene, or add knifes details to an existing image.

You can also choose the direction for the effect, or stick to a button reveal:

↔ 👀	↕ 👀
↕ 👀	🍴

Colors, labels, etc. are customizable so you should be able to do plenty things with this even if you have minimal knowledge of CSS+HTML.

Have fun!