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📄 ICO Generator

ICO File Generator

Create a standards-compliant .ico file containing 10 icon sizes from any PNG or JPG image. Free, instant, and 100% private — no server upload.

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What is an ICO file?

An .ico file is the Windows/browser icon format that bundles multiple image sizes into one file. When you add favicon.ico to a web project, browsers automatically choose the most appropriate size — 16px for tabs, 32px for HiDPI tabs, 256px or 512px for Windows/macOS icon caches.

Why use a multi-size ICO?

A single 16×16 favicon blurs on retina/HiDPI screens. A single 512×512 wastes bandwidth in tab bars. The ICO format solves this by packing all sizes in one file — browsers and operating systems pick the right one automatically. Our generator creates 10 sizes: 16, 24, 32, 48, 64, 72, 96, 128, 256, and 512 pixels.

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Frequently Asked Questions

The tool generates 10 sizes: 16×16, 24×24, 32×32, 48×48, 64×64, 72×72, 96×96, 128×128, 256×256, and 512×512 pixels — all packed into one .ico file.
Yes, completely free. No account required, no watermarks, and no upload limits. The tool runs entirely in your browser — no files are ever sent to our servers.
Any common image format works: JPG, PNG, WEBP, GIF, or BMP. For the best favicon quality, use a square PNG with a transparent background at 512×512 px or larger.