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Tool guide
ICO is a Windows container: one icon holds several bitmaps at different sizes, anywhere from 16×16 up to 256×256. Design editors and Figma usually refuse to open the file at all, and logo upload forms reject it outright. This converter lets the browser decode the icon and saves what it displays as an ordinary PNG with transparency intact — useful for lifting a site favicon into a moodboard or dropping a legacy program icon into a slide. See also: pack a PNG back into an ICO icon, scale the icon to 32×32 or 512×512, redraw the icon as an SVG.
No, and that is a real limitation. The browser does the decoding and it displays a single bitmap from the container — usually the largest one embedded. So the export is one PNG. To pull a specific smaller size, unpack the ICO with a desktop utility such as IcoFX or Resource Hacker.
Yes. Modern ICO files store a 32-bit variant with an alpha channel, PNG supports the same, and redrawing through a canvas carries the transparency over. The exception is very old 8-bit icons from the Windows 95 era, where transparency came from a mask — those can come back with a black background.
Because the source was. Many favicons contain nothing but a 16×16 bitmap, and the converter hands you exactly those pixels without inventing any. Stretching 16×16 to 512×512 without losing sharpness is not possible; you need a vector logo or a larger icon version from whoever made it.
Usually the file is a .cur cursor renamed to .ico, or the icon uses an uncommon encoding the browser engine does not decode. Try opening the same file directly in Chrome as its own tab: if no image appears there either, this converter cannot do anything about it.
It stays in your tab. The page reads the chosen file through a file input, paints it on a canvas and builds the downloadable PNG from there; no network request carries the icon's contents. That also means the tool keeps working with the internet disconnected, as long as the page is already open.
Use the paired PNG to ICO tool: it takes a square PNG and packs several scales into one favicon.ico. The ICO to PNG direction is for icons that already exist and whose contents you need in an editable format; the reverse is for a favicon you still have to assemble.
Before: favicon.ico containing three sizes: 16×16, 32×32 and 48×48
After: favicon.png at 48×48 with a transparent background — the largest bitmap in the container
Before: app.ico from the install directory, 256×256
After: app.png at 256×256, pasted into the slide with no white box behind it
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