Choose a PNG
Click the upload box or drag a .png image into the converter.
Free online image tool
PNG to ICO Converter
Turn one PNG into a genuine multi-size .ico icon in your browser. No upload, no signup.
Private browser conversion
Create a multi-size ICO
Choose a PNG image and build a genuine .ico file with 16, 32, 48 and 256 px icons in your browser. The file never leaves your device.
- 16×16
- 32×32
- 48×48
- 256×256
Input
Local conversion No server upload 16 / 32 / 48 / 256 px sizes Free to use
How it works
Build one .ico with four sizes.
Generate locally
The browser renders 16, 32, 48 and 256 px PNG images and packs them into one ICO container.
Download ICO
Preview the icon and save the .ico file immediately.
Why ICO
Why convert PNG to ICO?
One ICO file can hold multiple image sizes in a single download. This converter writes a genuine ICO container holding 16, 32, 48 and 256 pixel PNG images, so one download covers browser favicons, Windows shortcuts and desktop or app icons. If your source image is not square, every size keeps the aspect ratio and centers the image on a transparent background.
Use cases
Who needs PNG to ICO conversion?
Favicon for websites
Serve one multi-size .ico so browsers can pick 16 or 32 px for tabs and larger sizes for shortcuts and pinned sites.
Windows icons
Use the .ico file for desktop shortcuts, application windows and folder icons on Windows.
App and extension icons
Package a logo as an icon file with the sizes your manifest or project template asks for, from 16 px up to 256 px.
FAQ
PNG to ICO questions.
Is a renamed PNG a valid ICO?
No. Renaming a PNG to .ico only changes the extension. This converter writes a real ICO container with an ICONDIR header, four directory entries and four PNG images inside.
Which sizes are inside the ICO?
Exactly four: 16×16, 32×32, 48×48 and 256×256. Browsers and Windows pick the size that fits each context.
What happens with non-square images?
Every icon size keeps the aspect ratio: the image is scaled to fit and centered on a transparent square, so nothing is cropped or stretched. Small sources are also upscaled to reach 256 px.
Is transparency preserved?
Yes. Each frame is encoded as a 32-bit PNG, so the alpha channel of the source PNG is kept.
Will old icon tools read this file?
This tool uses PNG-compressed entries. Check the target app if it requires older BMP-based ICO images.
Are my images uploaded to a server?
No. Conversion happens locally in your browser using canvas. The selected PNG file is not sent to any server.
Can I convert several PNG files?
One .ico per conversion. After downloading, choose the next PNG or press Clear to start over. There is no daily limit.
Does it work on mobile?
Yes. Modern mobile browsers support file selection and canvas-based conversion, though icon files are mostly used on desktop.
Comparison
How this converter compares.
Icon editors and upload-based generators often require installation, accounts, or send your logo to a remote server. This PNG to ICO converter builds the multi-size .ico entirely in your browser. No upload, no watermark, and the output is a standard icon file ready for favicons, Windows and app icons.