An ICO file is a container format that bundles multiple icon sizes (16×16 to 256×256 pixels) into a single file. Windows and web browsers automatically select the best-fit size for each context.

Will transparency be preserved when converting PNG to ICO?

Yes. The ICO format fully supports alpha-channel (RGBA) transparency. Any transparent areas in your PNG source will be preserved in all sizes inside the ICO file.

What sizes are included in the generated ICO file?

The converter generates six sizes: 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 pixels, all packed into a single .ico file.

Can I use the ICO file as a website favicon?

Yes. Place the .ico file in your site root as favicon.ico and add to your HTML . All browsers and operating systems will recognize it.

PNG to ICO

Convert PNG images to multi-size ICO icons

Drag and drop your file here

or click to browse files • Max 50MB

Tips:

•Use PNG source files with transparency — the alpha channel is preserved in the ICO output
•A larger source image (512×512 or higher) produces sharper icons at every ICO size
•ICO files bundle multiple sizes (16×16 to 256×256) so Windows and browsers pick the best fit automatically
•For favicons, add <link rel="icon" href="favicon.ico"> to your HTML <head>

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