PNG

Portable Network Graphics is a raster-graphics file format that supports lossless data compression. PNG was developed as an improved, non-patented replacement for Graphics Interchange Format (GIF).

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 3.0

PIXCS

The photo-editing numbers, made simple — free calculators for image resizing, aspect ratios, DPI and print size, megapixels, file size, and aspect-ratio cropping, plus plain-English guides to resolution, file formats, color, and the basics of editing software.

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Every museum entry, image, and fact is drawn from Wikipedia and Wikimedia Commons, used under public-domain and Creative Commons licenses. No content is AI-generated.