PNG to ICO
Convert PNG to a multi-size .ico icon right in your browser — 16 to 256 px in one file, ready for favicons and app icons. No upload, transparent backgrounds preserved.
Drop an image here, or click to browse
Processed locally — nothing is uploaded
How to convert PNG to ICO
Drop your PNG into the box — it opens locally in your browser and is never uploaded. JPG and WebP also work; transparent areas are preserved.
Click Convert. The tool renders 16, 32, 48, 64, 128 and 256 px versions and packs them into one .ico container — the standard way favicons ship.
Click Download, then upload icon.ico to your site root (or set it in your CMS/favicon settings). Browsers pick the right size automatically.
Know-how
What an .ico really is: a box of sizes
Unlike PNG or JPG, an .ico file is a container that can hold several images at different resolutions — 16 px for browser tabs, 32 px for desktop shortcuts, 256 px for Windows large icons. One file, every size a context might ask for. This tool packs six sizes into one icon, which is why the output is a container rather than a single bitmap.
Modern ICOs are PNG inside — and that is fine
Old-style ICOs used uncompressed bitmaps, which is why people think of the format as clunky. Since Windows Vista, every ICO entry may be a PNG file — lossless, alpha-transparent, and smaller. Browsers and operating systems handle PNG-compressed ICOs natively. This tool writes exactly that: a standard container whose entries are PNG images, so quality and transparency never degrade.
Favicon sizes: which one is used where
A 16 px icon shows in browser tabs, bookmarks bars and history; 32 px in Windows taskbar and desktop shortcuts; 48 px in file managers; 256 px as the large Windows icon. When you ship one .ico containing all six, every surface renders crisply from the exact size it needs — no blurry upscaling anywhere. That is the practical reason multi-size matters.
Why a proper favicon matters for your site
Users see your icon dozens of times a day — in tabs, bookmarks and search suggestions. A blurry or missing favicon reads as an unfinished site, while a crisp icon makes bookmarks easier to find and raises click-through from saved links. One multi-size .ico is all it takes; upload it once and every browser surface is covered. Small asset, outsized impression.
Frequently asked questions
Is this PNG to ICO converter really free?+
Yes. Conversion runs entirely in your browser — no servers, no uploads, no limits on how many icons you make.
What is the difference between ICO and PNG?+
PNG is a single image; ICO is a container holding several sizes of the same icon. Browsers and Windows expect .ico for favicons and shortcuts so they can pick the right size — that is why the converter outputs six sizes in one file.
Why does the output contain six sizes?+
Because favicons are shown at different sizes everywhere: 16 px in tabs, 32 px on the taskbar, 256 px as a large icon. Packing all six lets every surface render from its exact size with no blur.
Does it support transparency and what about animated PNGs?+
Transparency is preserved in every size — icons without backgrounds look right on any theme. Animated PNGs are not supported: the first frame is used, which is the honest standard for favicons.