ICO is the Windows icon format used for app icons, favicons, and desktop shortcuts. Converting a PNG to ICO packages your image at the exact sizes Windows and browsers expect.
Convert PNG to ICO – Free Online PNG to ICO Converter
Why convert PNG to ICO?
- Create a favicon.ico for a website from a PNG logo.
- Build custom Windows application or shortcut icons.
- Bundle multiple resolutions into one icon file for crisp display at any size.
Tip: Start from a square PNG (e.g. 256×256) with a transparent background for the sharpest icons.
What is the difference between PNG and ICO?
| PNG | ICO | |
|---|---|---|
| Purpose | General-purpose raster image | Icon container for Windows and browsers |
| Structure | One image at one resolution | Bundles several raster sizes in one file |
| Transparency | Full alpha channel | Alpha kept in every bundled size |
| How it is displayed | Shown as-is, scaled by the viewer | OS or browser picks the nearest bundled size |
| Where it is used | Everywhere | favicon.ico, shortcuts, Windows app icons |
Does converting PNG to ICO lose quality?
An ICO is not one image but a stack of them: the conversion renders your PNG down into the small sizes Windows and browsers actually request, and each context then grabs the rendition closest to what it needs. The quality question is therefore all about downsampling. At 16 pixels, hairline strokes vanish, gradients merge into a single tone, and any wordmark longer than a couple of letters becomes texture — which is why strong favicons are one bold shape.
Edge quality is worth a deliberate check. The alpha channel survives into every bundled size, but anti-aliased edges that looked crisp at 256 pixels can read as faintly ragged once shrunk, and artwork exported against a white matte may show a light halo on dark browser themes. Preview the finished icon against both a light and a dark tab bar before shipping — dark mode is where edge flaws surface first.
Deployment is refreshingly simple: the output is a small file, conventionally placed at the site root as favicon.ico, and it also drops straight onto a Windows shortcut or application without further processing. The most common frustration after converting is not the file at all but caching — favicons are cached harder than almost any other asset, on both browsers and Windows itself.
What can go wrong converting PNG to ICO?
- My site still shows the old favicon after uploading the new one — Favicons are aggressively cached. Hard-reload the page, add a version query to the favicon link tag (favicon.ico?v=2), and give other visitors' caches a day or two to roll over.
- The icon is an unreadable smudge in browser tabs — Too much detail survived into the 16-pixel rendition. Simplify the artwork to one bold shape or letterform on a plain background and convert again.
- My logo looks stretched or has bars around it — Icon slots are square, so non-square art gets padded or distorted to fit. Crop the PNG to a 1:1 composition around the mark before converting.
- Windows keeps showing the old shortcut icon — That is the Windows icon cache, not the file. Rename the .ico or point the shortcut at it afresh, and restart Explorer if the stale icon persists.
How to convert PNG to ICO
- Upload your PNG file using the area above.
- ICO is preselected as the target format.
- Click Start and wait for the conversion to finish.
- Download your converted ICO file.