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PNG → ICO · JPG → ICO · SVG → ICO · WEBP → ICO · AVIF → ICO

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BMP to ICO Converter (transparent, multi‑size favicon)

Convert BMP to ICO online. Create multi‑size favicons (16–256 px) with transparent or solid background—browser‑based.

Why convert BMP to ICO

Some environments still expect favicon.ico at the site root. A multi‑size ICO (16–256) guarantees crisp results in Windows and legacy contexts. Pair it with Apple Touch PNG and masked SVG for full coverage.

Recommended sizes

  • Classic tabs: 16×16, 32×32
  • Hi‑DPI: 48×48, 64×64
  • Windows/large: 128×128, 256×256

Complete head snippet

<link rel="icon" href="/favicon.ico" sizes="any">
<link rel="icon" href="/favicon.svg" type="image/svg+xml">
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
<link rel="manifest" href="/site.webmanifest">
<link rel="mask-icon" href="/safari-pinned-tab.svg" color="#0f172a">
<meta name="theme-color" content="#0A0F1E">

Troubleshooting

  • Blurry at 16 px: simplify artwork or use a sharper profile.
  • Caching: append ?v=2 to force reload.
  • Transparency edges: try solid background for tiny sizes.

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