How this works in your browser
An ICO file is a small archive: a directory listing every image it contains along with each one's dimensions, colour depth and byte offset, followed by the image data itself. The tool reads that directory, picks the entry with the largest dimensions, decodes it and redraws it onto a canvas before exporting as PNG. Transparency survives because both formats carry an alpha channel, so the mask defining the icon's shape maps directly across. Choosing the largest entry is deliberate: it is the only choice that never throws away detail you might want, since you can always scale down afterwards but never back up.
ICO to PNG vs. traditional online converters
| Feature | ICO to PNG (in-browser) | Traditional online converters |
|---|---|---|
| File upload required | No - never leaves your device | Yes - file is sent to a server |
| Processing queue | None - starts instantly | Often, especially at peak times |
| Watermark on output | Never | Common on free plans |
| Usage limits | None - free, unlimited use | Often capped per day or file size |
| Works offline once loaded | Yes, for most tools | No - requires a live connection |
| Account required | No | Often, for anything beyond a trial |
Who uses ICO to PNG
Editing an existing favicon
Get a site's icon into a format a design tool can actually open so you can modify or rebuild it.
Reusing an app icon
Extract an icon from a Windows application to use in documentation, a presentation or a web page.
Recovering brand assets
Pull a usable logo out of an old .ico when the original artwork has been lost.
How to use ICO to PNG
- 1
Open the ICO to PNG converter
Go to tools.slaytic.com and open the ICO to PNG tool. No sign-up or account required.
- 2
Drop your .ico file
Add the icon file. The largest image inside it is selected automatically, giving you the most detail.
- 3
Download the PNG
Save the result with transparency intact, ready to open in any image editor.
Frequently asked questions
What if my ICO file contains multiple icon sizes?
The largest image stored inside the ICO file is used for the PNG output.
Is transparency preserved?
Yes, if the source icon has transparent areas, they carry over to the PNG output.
Can I then edit the PNG in a design tool?
Yes, once converted to PNG the image opens in any standard image editor.
Why does an ICO file contain several images?
Because an icon has to look right at wildly different sizes. Rather than let the system scale one image down and turn a 256px logo into a 16px smudge, ICO bundles separately drawn versions and the operating system picks whichever fits. It is a container of images, not a single picture.
Can I get a specific size instead of the largest?
This tool extracts the largest version, which gives you the most detail to work with. If you need a smaller one, convert and then resize down, since scaling from the biggest source produces a better result than pulling out an already-small variant.
How do I go the other way and make a favicon?
Use the Favicon Generator, which produces a proper multi-size .ico plus the PNG sizes and manifest a site needs. Simply renaming a PNG to .ico does not work, because the formats have entirely different structures.
Is my file uploaded anywhere?
No. The icon is decoded and re-encoded inside your browser tab.