What are retina/high-DPI image considerations?

Retina/high-DPI displays pack more pixels per inch than standard screens. A 600px-wide image displayed at 600px looks fuzzy on retina screens because they expect more pixel data. The solution: serve images at 2x (or higher) dimensions and scale them down with HTML/CSS.

Implementation: For an image displaying at 300px wide, upload a 600px image and set width="300" in HTML. The extra pixels provide sharpness on high-DPI displays while HTML constrains the rendered size. Balance quality against file size-2x images are 4x the pixels.

Optimize for the sweet spot. Retina-quality images improve appearance on modern phones and laptops (the majority of views). But 3x or 4x images add diminishing returns and significant file weight. 2x is the standard compromise-sharp enough for retina, manageable file sizes with proper compression.

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