The world’s smallest PNG

The smallest PNG file is 67 bytes. It’s a single black pixel. Here’s what it looks like, zoomed in 200×:

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The rest of this post describes this file in more detail and tries to explain how PNGs work along the way.

There’s a big twist at the end, if that excites you. But I hope you’re just excited to learn about PNGs.
↫ Evan Hahn

I know way too much about PNGs now, information I won’t ever need but am glad to have.