Online Tool Store
SVG to ICO
Convert an SVG into a multi-resolution .ico file with the sizes you choose, ready to use as a website favicon. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
How the SVG to ICO converter works
- Upload an SVG and choose which pixel sizes to bundle into the icon.
- Each size is rasterized onto a canvas and encoded as a PNG.
- All the PNGs are packed into a single .ico file with a standard ICO directory header.
The method
An ICO file is a small binary container: a 6-byte header stating the image count, followed by one 16-byte directory entry per size (dimensions, color depth, byte offset), followed by the actual image data - PNG bytes for each size, one after another.
FAQ
Why does an ICO file need multiple sizes?
A single .ico file can bundle several resolutions of the same icon, and the operating system or browser picks the best match for where it's being displayed - a browser tab, a taskbar, or a desktop shortcut.
Which sizes should I include for a website favicon?
16px and 32px cover browser tabs and bookmarks reliably. Add 48px if you also want the icon to look sharp in Windows shortcuts.
Does this use PNG or BMP inside the ICO file?
PNG. Modern ICO files can embed PNG-compressed images directly, which every current browser and operating system supports, instead of the older raw bitmap format.
Is my SVG uploaded anywhere?
No. Rasterizing each size and assembling the .ico container both happen locally in your browser using the Canvas API - nothing is sent to a server.
How we compare
| Feature | Online Tool Store | favicon.io | Image editor "export as ICO" |
|---|---|---|---|
| No file upload - runs in your browser | ✓ | ✗ | ✓ |
| Choose exactly which sizes to include | ✓ | Fixed set | ✓ |
| Free, no sign-up | ✓ | ✓ | Often paid software |
For a fast, private favicon build from an SVG without installing an image editor, SVG to ICO gets you a file in seconds.