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Chris Coyier on (Updated on )

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As a connoisseur of web trickery, this is a must share:

POW stands for Packaged Offline/online Webpage. It turns out the png format includes ways to save metadata alongside the image file. A powfile has a metadata entry that contains a zip file that contains a full website.

So a PNG file can contain an entire website with multiple resources. Wild. The concept is open-source.

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