How it works
From SVG to ICO, in three steps
- 01
Choose an SVG file
Drop a .svg logo or icon in. A square, simple mark works best.
- 02
Nothing else to set
Every standard icon size (16 to 256px) is rasterized and packed in automatically.
- 03
Download ICO
Your favicon.ico downloads straight to your device. It never touched a server.
A .ico file isn't one image, it's a small container holding several versions of the same icon at different fixed sizes, so the operating system or browser can pick whichever one actually fits the slot it needs. This tool rasterizes your SVG six times, once at each of 16, 32, 48, 64, 128, and 256 pixels square, then packs all six into a single valid .ico file using the same PNG-based entry format modern Windows and every browser already expect.
If your source SVG isn't square, each size is fit to the square canvas and centered rather than stretched, so a wide or tall logo doesn't come out visibly squashed at any size.
When you need this
A favicon for a website
Browsers still look for favicon.ico by default in many setups. This gives you one file with every size a browser might request, generated from your existing SVG logo.
A Windows app or shortcut icon
Windows uses .ico specifically for application and shortcut icons, and expects multiple sizes bundled into the one file, exactly what this tool produces.
You only have a vector logo, not pre-sized PNGs
Rather than manually exporting six separate PNGs at six sizes and packing them by hand, this does the whole thing from a single SVG in one step.
Replacing a blurry or outdated favicon
If your current favicon was scaled up from a small source image, regenerating it fresh from a vector logo will look noticeably sharper, especially at the larger sizes some browsers now use.
Worked example
Say you have brand-mark.svg, a simple square logo, and your site's favicon is years out of date.
Drop the file in above. There's nothing to configure, the six standard sizes are fixed and always included, so you just wait for the conversion to finish. brand-mark.ico downloads with all six sizes packed in, ready to drop into your site's root folder or your app's icon settings.
If your logo isn't square to begin with, each size still comes out as a proper square file, the artwork is centered and fit within it rather than stretched to fill, so it won't look distorted at any of the six sizes.
Format explainer
ICO is a container format, not a single image: internally it's a small directory listing followed by several embedded images, historically raw bitmap data but for years now typically just embedded PNGs, which is what this tool writes. That's what lets one favicon.ico serve a 16px browser tab icon and a 256px Windows desktop shortcut from the same file, the consuming software just reads the directory and picks the size it wants.
SVG has no fixed size at all, which is exactly the problem ICO's multi-size design solves: this tool renders your vector artwork fresh at each of the six sizes ICO conventionally expects, rather than generating one size and letting something else stretch it down or up later, which is where visible blurriness usually comes from.
Frequently asked questions
Not currently, this tool always includes all six standard sizes (16, 32, 48, 64, 128, 256px) in one file. That matches what favicon.ico and Windows icon slots conventionally expect, and it means you don't need to think about which sizes to pick.
No. Each size fits your SVG's own aspect ratio within the square canvas and centers it, leaving transparent space on the shorter side rather than distorting the artwork to fill a square it wasn't drawn for.
Because it's not one image, it's six, one per standard size, each with a real alpha channel. That's normal for a properly built multi-size ICO and is exactly what lets different consumers of the file pick the size that fits.
Yes, the same .ico structure serves both uses. Windows reads the same multi-size container for app and shortcut icons that browsers read for favicons.
A 16px icon has very little room for detail regardless of the source, that's true of any favicon generator. Simple, high-contrast marks hold up best at the smallest sizes; a logo with lots of fine detail will read better at 48px and up but may lose clarity at 16px.
No. Every size is rendered locally using your browser's own SVG engine, then packed into the .ico file entirely on your device. Nothing about your logo leaves your browser tab.