Build a real multi-size .ico file from any image — 16, 32, 48, 64, 128, 256 px embedded in one file. Works for browsers, Windows shortcuts, macOS dock. PNG, SVG, JPG, WebP and GIF source. No upload.
Drop an image or click to browse
PNG, SVG, JPG, WebP, or GIF — square source works best
100% in your browser — file never leaves your device · max 20 MB
Upload your source image
PNG or SVG work best, but JPG, WebP and GIF are all supported. A square source 512×512 or bigger gives the cleanest result.
Pick sizes
16/32/48 cover browser tabs and Windows taskbar. Add 64/128/256 for modern high-DPI displays and Windows 10/11 shortcuts.
Download favicon.ico
omnikitbolt encodes all sizes into one .ico file locally. Drop it in your site root and add one <link> tag.
For dark/light mode and modern browsers, also ship a SVG favicon — much smaller and scales infinitely. Rasterize SVG to PNG
Pack 16, 32, 48, 64, 128 and 256 px variants into a single .ico file — browsers pick the sharpest size automatically.
ICO file is assembled locally with the native Canvas API and a tiny JS encoder. No upload, no server, your image stays on your device.
Start from PNG, SVG, JPG, WebP or GIF. Transparency is preserved — a square source 512×512 or bigger gives the cleanest result.
A modern .ico file is just a container for multiple PNG variants of the same icon. Browsers and operating systems each pick the size that best matches where the icon is displayed, from a 16×16 slot in a browser tab to a 256×256 shortcut on Windows 11.
Modern browsers also accept an SVG favicon, which is smaller and scales to any size perfectly. Use both: a multi-size .ico as a universal fallback plus a .svg for Chrome/Firefox/Edge. Legacy user agents that only read .ico will still get the right icon.
.svg){kind=small}
<link rel="icon" href="/favicon.ico" sizes="any">
<link rel="icon" href="/favicon.svg" type="image/svg+xml">
<link rel="apple-touch-icon" href="/apple-touch-icon.png">Drop favicon.ico in your site root and add the tags to the document <head>. Clear the browser cache to see it update.