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Modern browsers and devices support a bewildering array of icon sizes. However, recent guidance suggests that developers can get by with a minimal set. The Evil Martians team recommends serving just a few key files: a 32×32 PNG for most browsers, an SVG for high‑resolution displays, and a larger 180×180 PNG for Apple touch icons336326698383943†L80-L88. Progressive web apps also include a web app manifest listing 192×192 and 512×512 icons336326698383943†L90-L103.
By focusing on this small set you avoid cluttering your repository with dozens of unused sizes and ensure that browsers pick the best icon automatically. Many online generators output far more files than necessary, but the minimal approach is sufficient for most sites.
AI Free Tools’ Favicon Generator reflects these best practices by producing square PNG files in common sizes. You can then add an SVG version or high‑resolution icons separately if needed. Keep your HTML clean and your site lightweight by including only the icons your audience requires.