Convert SVG to ICO
Output is typically roughly 5.0× larger.
- Files stay on your device
- Free, no sign-up
Related tools
All image toolsQuestions
Do I still need a favicon.ico if I have an SVG icon?
It is close to optional now, but cheap to keep. Browsers that support SVG favicons prefer them, and the ones that do not will request /favicon.ico from your site root whether or not you reference it — so having the file prevents a stream of 404s in your logs. The usual set is an SVG for the tab, a 180 × 180 PNG for Apple touch, and favicon.ico as the floor.
Will converting SVG to ICO make the file smaller?
Usually, yes. A 12-megapixel photo is around 20 KB as SVG and around 100 KB as ICO — roughly 5.0× larger. Because ICO is lossless the result depends entirely on the image content — flat colour and text compress far better than photographic detail.
Does converting SVG to ICO lose quality?
No. ICO is lossless, so every pixel decoded from your SVG file is stored exactly. Both formats are lossless, so the conversion is pixel-for-pixel identical.
Is transparency preserved when converting SVG to ICO?
Yes. Both SVG and ICO support an alpha channel, so transparent and semi-transparent pixels carry across unchanged — a logo with a cut-out background stays cut out, and soft drop shadows keep their gradient rather than picking up a white halo. Because ICO is lossless, the alpha channel is stored exactly as it was.
What happens to an animated SVG?
Only the first frame is converted. Every conversion here decodes one frame onto a canvas and re-encodes it, so the result is always a still image — that applies to ICO as much as to any other target. To shrink an animation while keeping the motion, a video file (MP4 or WebM) is usually around a tenth of the size of the equivalent SVG, and needs an encoder we do not ship yet.
What resolution will the ICO be?
SVG is vector, so it has no inherent resolution — it has to be rendered at a chosen pixel size. We use the SVG's declared width and height, or its viewBox if no size is set. Because you are converting from vector to pixels, the result stops being scalable: export at 2× the size you plan to display for sharpness on high-DPI screens.
What sizes are in the ICO file?
Four — 16, 32, 48 and 256 pixels — packed into a single file, each stored as PNG. That is the point of the format: the browser or operating system picks whichever size it needs, so one favicon.ico covers tab icons, bookmarks and Windows shortcuts. Non-square images are centred rather than stretched, so start from a square source if you can.
How it works, and more about svg to ico
How it works
- Add your SVG file. Drag a SVG file onto the drop zone, or click to browse. You can select several at once.
- Choose your settings. ICO is lossless, so there is nothing to configure — the output matches the input pixel for pixel.
- Download the ICO. Conversion runs on your device as soon as each file is added — no upload, no queue. Download each result when it is ready.
Why people convert SVG to ICO
The modern favicon pipeline starts from a vector logo. The SVG itself is what you want in the browser tab on any current browser; the ICO is the fallback for everything older, and the two ship side by side.
Convert for the fallback, but keep referencing the SVG as your primary icon — it stays sharp at every size and on every display. Because the ICO is generated from vector artwork rather than upscaled from a small raster, the large 256-pixel entry comes out genuinely crisp.
Worth knowing: An SVG renders at its declared width and height, and icon SVGs very often declare something like 24 × 24 — which produces a blurry icon. Set width and height to 256 in the file first; it is plain text, so any editor will do.
SVG and ICO side by side
| SVG | ICO | |
|---|---|---|
| Full name | Scalable Vector Graphics | Windows Icon |
| Compression | Vector — resolution independent | Lossless |
| Transparency | Yes — alpha channel | Yes — alpha channel |
| Animation | Yes | No |
| Browser support | Universal in all modern browsers | Universal for favicons |
| Typical 12 MP photo | ~20 KB | ~100 KB |
| Usually used for | Logos, icons, charts and illustrations | Website favicons and Windows application icons |
On a typical 12-megapixel phone photo, the ICO output comes out roughly 5.0× larger than the SVG original. These are order-of-magnitude figures for one kind of image — your own results will vary a great deal, because flat colour, text and line art behave nothing like photographic detail.
What this tool actually produces
Not estimates. Each row below was produced by running the file through this page in a real browser and measuring the result, at the default quality of 82.
| Test image | SVG in | ICO out | Change |
|---|---|---|---|
| Line-art diagram 1200 × 800, hard edges and large flat areas | 2 KB | 12 KB | +443% |
| Logo with transparency 512 × 512, flat colour on a transparent background | 518 B | 39 KB | +7647% |
Every test image got larger. That is expected for this pair rather than a fault: ICO is not the efficient choice for content that already suits SVG, and you are converting for compatibility or for editing headroom, not to save space. Measured in Chrome 150.0.7871.46; other browsers encode slightly differently.
What to watch out for
- Only practical at small icon sizes
- Obsolete for general imagery
- Modern sites increasingly prefer SVG or PNG favicons
- Animation is lost. Only the first frame is converted — every conversion here decodes a single frame onto a canvas and re-encodes it, so the result is a still image whatever the target format. To shrink an animation and keep the motion, a video file is typically around a tenth of the size of the equivalent SVG.
About the two formats
SVG is not pixels at all — it is XML describing shapes, so it stays perfectly sharp at any size and is usually a few kilobytes. That makes it ideal for logos and icons and useless for photographs. Converting a photo to SVG is not really possible; converting an SVG to a raster format is just rendering it at a chosen size.
ICO is a container rather than a codec: it bundles the same icon at several sizes — typically 16, 32, 48 and 256 pixels — so the operating system or browser can pick the right one. Its remaining job is the favicon at the root of a website, and Windows application icons.
Other conversions
Everything runs on your device — nothing is uploaded, so there is no size limit, no queue and no copy left on a server afterwards. There is more on how browser-based conversion works if you want the detail. Otherwise, browse every image tool.