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SVG to ICO Converter

SVG is a vector format; converting rasterizes it so it works anywhere an image is expected. Converting to Windows ICO icons gives you the icon format browsers look for at /favicon.ico and Windows uses for shortcuts. Plenty of software refuses vectors outright: office documents, most social platforms, email clients, printers' upload portals and any tool that expects a bitmap. Rasterizing is the price of admission, and the resolution has to be chosen at that moment rather than left flexible. Website favicons and Windows shortcut icons — a square source with clear shapes that still read at 16 pixels. Drop your files below and the work happens on your own machine: the conversion runs in the browser through the Canvas API, so nothing is uploaded, there is no file-size cap, no watermark and no sign-up. Batches are fine — drop a folder's worth and take them back as a single ZIP.

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What a SVG file actually is

SVG is not a grid of pixels at all: it is an XML document describing shapes, paths and text, which the renderer draws at whatever size it is asked for. That is why a 4 KB logo stays perfectly sharp on a billboard, and why the file is often smaller than a thumbnail of itself.

SVGs come out of Illustrator, Figma, Inkscape and icon libraries. Logos, icons, charts and diagrams are the natural cases — anything built from shapes rather than captured from a camera.

What you get from ICO

ICO is a container that holds one or more small square images, with transparency, for use as an icon. It caps out at 256×256 — anything larger has to be scaled down, and the format is not intended for general pictures.

Every browser requests /favicon.ico by default, with no HTML required, and Windows uses ICO for application and shortcut icons. It is a narrow format that is completely reliable inside its niche.

What changes when you convert SVG to ICO

Both formats are lossless, so nothing is thrown away in either direction — this is a container change rather than a quality decision. What differs is how efficiently each one packs the same pixels, and how widely each is supported by the software you need to open it in.

Transparency survives intact. Both SVG and ICO carry a full 8-bit alpha channel, so cut-outs, drop shadows and anti-aliased edges convert without a white box appearing behind them, and the result still composites cleanly onto any background colour.

The important loss here is scalability rather than quality. An SVG is drawn fresh at whatever size it is asked for; the moment it becomes a ICO it is a fixed grid of pixels, and enlarging it later softens the edges. Rasterize at the largest size you will realistically need, and keep the original SVG — it remains the master copy.

ICO cannot exceed 256×256, so anything larger is scaled down to fit while keeping its aspect ratio. Work from a square source if you can — a wide image gets letterboxed into the square, and fine detail disappears entirely at the 16-pixel size a browser tab actually renders.

A vector is the ideal starting point for an icon, because the shapes were designed rather than sampled and they scale down cleanly. If the logo has fine strokes or small lettering, consider simplifying it in the SVG first: what reads on a business card disappears completely in a browser tab.

Frequently asked questions

Is this SVG to ICO converter really free and private?

Yes. Conversion happens entirely in your browser using the Canvas API — your SVG vector graphics are never uploaded to a server, there is no file limit, no watermark and no sign-up.

Can I convert multiple SVG files at once?

Yes — drop any number of files and they convert in one batch. Use "Download all" to save the results as a single ZIP.

What size will my ICO file be?

ICO cannot store an image larger than 256×256, so anything bigger is scaled down to fit while keeping its aspect ratio. For a browser favicon a square source works best — 256×256 covers every modern use, and browsers scale it down to the 16 or 32 pixel tab icon themselves.

How do I use this as my website favicon?

Save the file as favicon.ico in your site's root directory. Browsers request /favicon.ico automatically, so no HTML is strictly needed — though adding <link rel="icon" href="/favicon.ico"> makes it explicit.

Does converting SVG to ICO lose quality?

Both formats are lossless, so nothing is thrown away in either direction — this is a container change rather than a quality decision. What differs is how efficiently each one packs the same pixels, and how widely each is supported by the software you need to open it in.

Should the icon be square?

Yes. ICO holds square images, so a wide or tall source is fitted into the square and ends up with empty space around it. Start from a square design with generous margins — the tab icon renders at 16 pixels, where anything intricate turns to mush.

What resolution should I rasterize the SVG at?

The largest size you will realistically use, then scale down as needed — enlarging a raster afterwards softens every edge. Keep the SVG itself as the master, because it is the only version that stays sharp at any size.

Related conversions

JPG → ICOPNG → ICOWebP → ICOHEIC → ICOAVIF → ICOGIF → ICO

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