What icon sizes are included in the generated ICO file?

Deliteful generates ICO files containing all standard Windows icon sizes. Windows automatically selects the appropriate embedded size depending on the display context — taskbar, desktop, file explorer, or high-DPI monitor.

Can I generate a single-size ICO instead of a multi-size one?

No. The tool is fixed to standard Windows multi-size output. Custom or single-size ICO generation is not supported.

Does the tool preserve PNG transparency in the ICO?

Yes. Transparency is preserved where the ICO format supports it, so icons with transparent backgrounds render correctly against any Windows desktop wallpaper or theme.

What image formats can I convert to ICO?

You can upload PNG, JPG, JPEG, and WebP files. Each file must be 50MB or less. Unsupported or unreadable files are skipped.

Can I process multiple app icons at once?

Yes. Batch upload supports up to 50 images per job or 2GB total, whichever comes first. Each image produces its own ICO file in the output.

Create Windows ICO Files for Desktop Application Deployment

Shipping a Windows desktop app without a proper multi-size ICO file means blurry taskbar icons, ugly installer shortcuts, and a product that looks unfinished. Deliteful converts any PNG, JPG, JPEG, or WebP into a single ICO file containing all standard Windows icon sizes — automatically.

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Windows selects icon sizes contextually: 16×16 for file explorer list view, 32×32 for standard desktop, 48×48 for large icon mode, and 256×256 for high-DPI displays and modern taskbars. A single-size PNG used as a .ico fails at least three of these contexts. Building the multi-size ICO manually in image editing software takes 10–20 minutes per asset. Deliteful does it in seconds.

The tool processes PNG, JPG, JPEG, and WebP inputs using high-quality resampling, preserves transparency where the ICO format supports it, and produces one ICO per uploaded image. There is no configuration required — Windows standard dimensions are embedded automatically. For developers managing multiple app assets or building installers, batch upload handles up to 50 files at once.

How it works

1
Sign in with Google
Create your free Deliteful account in about 3 clicks — no credit card required.
2
Upload your source images
Upload PNG, JPG, JPEG, or WebP files up to 50MB each, or batch up to 50 files at once.
3
Download your ICO files
Each input produces one multi-size ICO file ready for use in your app manifest, installer, or shortcut.

Frequently asked questions

What icon sizes are included in the generated ICO file?: Deliteful generates ICO files containing all standard Windows icon sizes. Windows automatically selects the appropriate embedded size depending on the display context — taskbar, desktop, file explorer, or high-DPI monitor.
Can I generate a single-size ICO instead of a multi-size one?: No. The tool is fixed to standard Windows multi-size output. Custom or single-size ICO generation is not supported.
Does the tool preserve PNG transparency in the ICO?: Yes. Transparency is preserved where the ICO format supports it, so icons with transparent backgrounds render correctly against any Windows desktop wallpaper or theme.
What image formats can I convert to ICO?: You can upload PNG, JPG, JPEG, and WebP files. Each file must be 50MB or less. Unsupported or unreadable files are skipped.
Can I process multiple app icons at once?: Yes. Batch upload supports up to 50 images per job or 2GB total, whichever comes first. Each image produces its own ICO file in the output.

Create your free Deliteful account with Google and convert your app icons to Windows-ready ICO files in seconds.