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page.convert.ico.faq.title

What is an ICO file?

ICO is Windows icon format containing one or more images at different resolutions, typically 16×16 to 256×256 pixels.

What image sizes are included in ICO files?

Standard ICO files contain multiple resolutions: 16×16, 32×32, 48×48, and 256×256 pixels for different display contexts.

Can I convert a JPG to ICO?

Yes, you can convert JPG, PNG, and other image formats to ICO. For best results, use a square image with a clear subject.

What resolution should I use for a website favicon?

Modern browsers prefer 32×32 or 48×48 pixel ICO files for favicons, though 16×16 is the minimum required size.

Are ICO files supported on macOS and Linux?

ICO files are primarily a Windows format. macOS uses ICNS files and Linux uses PNG for application icons.

How do I use an ICO file as a favicon?

Place the ICO file at your website root as favicon.ico, or reference it via <link rel="icon" href="/favicon.ico"> in your HTML.

Can ICO files contain transparent backgrounds?

Yes, ICO files support transparency. PNG-based ICO images support full alpha transparency for smooth edges on any background.

What is the maximum size of an ICO file?

ICO files can contain images up to 256×256 pixels in compressed PNG format, with no strict file size limit.

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