Convert ICO

Convert your ICO icons to any image format online for free - 100% local. 100% local conversion · your files are never uploaded to the server

CONVERTIR ICO A...

Select output format

PNG.png

JPG.jpg

JPEG.jpeg

BMP.bmp

WebP.webp

TIFF.tiff

TIF.tif

ICO.ico

JFIF.jfif

PJPEG.pjpeg

PJP.pjp

📋 PNG - Sin pérdida de calidad, soporta transparencia, ideal para logos y gráficos
PNG (Portable Network Graphics) is a lossless format that supports transparency. Perfect for logos, icons, and graphics with sharp edges.

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ICO format guide

Converting from ICO: one file, several images inside

How the Windows icon format works and what happens to its different resolutions when you convert it

ICO is the Windows icon format and, since the early days of the web, also the format of the favicon — that small icon in the browser tab. What makes it unusual is that it does not behave like an ordinary image file.

An ICO is a container: inside it holds several versions of the same image at different sizes and colour depths. The operating system or browser picks whichever fits best at any moment — the 16-pixel one for the tab, 32 for the desktop, 256 for large icon view.

Why that design exists

Because automatically shrinking a large image down to 16×16 pixels produces terrible results. At that size there is no margin: every pixel counts, and a generic rescaling algorithm turns any logo into a blurry smudge. ICO's answer is to let a designer hand-draw the small version, simplifying the shapes, and store it in the same file alongside the large one.

That is why well-made system icons look crisp at every size: they are not the same image rescaled, they are different drawings packaged together.

Size	Where it is normally used
16 × 16	Browser tab, title bar, menus
32 × 32	Desktop, taskbar, dialog boxes
48 × 48	Medium icon view in the file explorer
256 × 256	Large icon view; the format's maximum size

⚠️ Converting an ICO to a normal image yields only one of those versions, not all of them: JPG, PNG and the rest store a single image. The highest available resolution is usually the one extracted, since it is the most useful, but if your ICO only contained small versions the result will be small. Enlarging it afterwards adds no detail that was not already there.

Transparency: the thing to watch

Practically every icon has a transparent background — that is what lets it sit properly on a desktop of any colour. Modern ICOs store a full alpha channel, with anti-aliased edges just like a PNG.

The consequence when converting is direct: choose JPG or BMP and that transparency is lost, leaving the icon on a solid colour rectangle. To keep the cut-out, the destination must be PNG or WebP.

Which format should you move your ICO to?

To PNG — the default choice

Keeps transparency intact and loses no quality. It is what you need to use the icon on a website, in a document, or to edit it.

To WebP — for the web

Keeps transparency and weighs less than PNG. A good choice if the icon is going on a page.

To JPG — only without transparency

Only if you need absolute compatibility and do not mind the solid background. For an icon it is rarely the best option.

To BMP — legacy software

If a specific program asks for it. You lose transparency and the file grows with no upside.

💡 Icons are very small images: do not put them through lossy formats. At 16 or 32 pixels each pixel is a significant part of the drawing, and compression artefacts that would go unnoticed in a photo wreck edge sharpness here. Lossless PNG or WebP are the right call.

Converting your ICO files step by step

Pick a format that supports transparency

PNG in most cases, WebP if the destination is a website. Avoid JPG unless the solid background is fine by you.

Add your ICO files

Drag them onto the drop zone or click to select them. You can convert several at once.

Convert and check the size you got

The resulting image carries the resolution of the version extracted from the container. If it comes out smaller than expected, the ICO did not include a larger one.

Download

The whole process happens in your browser; files are never uploaded to any server.

Because icons are. The maximum the ICO format allows is 256×256 pixels, and many files do not even include that version: if the ICO only held 32×32, that is all there is. Enlarging the result afterwards does not create detail that never existed.

No. Ordinary image formats store a single image, so one version is extracted from the container, usually the largest available. The rest have nowhere to go in the destination file.

Yes, completely. Both formats handle an alpha channel with intermediate levels, so the icon's anti-aliased edges survive exactly. It is the recommended conversion.

Current browsers accept PNG and SVG favicons without trouble. ICO still has the advantage of packing several sizes into one file and working in very old browsers, which is why many sites still offer both.

Because you are enlarging an image that originally had very few pixels. The detail information was never in the file; scaling can only interpolate between the pixels that exist. For a large icon you have to start from the original design, not from the small version.

They are near-identical formats: .cur is the Windows cursor variant and adds the hotspot position, the exact pixel the pointer clicks with. Structurally they share practically everything else.

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