PNG to ICO Converter

Converts a PNG image into a multi-size ICO file suitable for Windows icons and application manifests for desktop apps.

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About This Tool

This tool accepts a PNG file and generates a Windows-compatible ICO file containing common icon sizes (16x16, 32x32, 48x48, 64x64, 128x128, 256x256, 512x512). It preserves transparency and the alpha channel, producing a standards-compliant ICO with multiple embedded images.
Conceptually, the workflow validates the input, resizes the image to each target size using high-quality resampling, and packs the results into a single ICO container. If a PNG includes transparency, the tool encodes 32-bit depth when needed; otherwise, 24-bit depth is used. The final ICO is suitable for Windows launchers, installers, and web favicons.
Who benefits include software developers packaging desktop apps, web teams needing favicons, and designers preparing icons for cross-platform deployments. Unique value lies in automating multi-size packing from one source image, preserving alpha, and delivering a deterministic, standards-compliant ICO without manual binary editing.

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How to Use

Upload a PNG image and (optionally) specify target icon sizes.
Choose color depth (24-bit or 32-bit with alpha) if available.
Run the conversion to generate the ICO file.
Download the ICO and validate that all requested sizes are embedded.
Use the ICO in Windows installers or web assets.

Frequently Asked Questions

Find Quick Answers

What inputs are required?

A PNG image is required. You may optionally specify the embedded icon sizes and color depth. If sizes are omitted, a standard set is applied to ensure broad compatibility across Windows versions and common platforms.

What sizes are embedded by default?

Default embedded sizes typically include 16x16, 32x32, 48x48, 64x64, 128x128, 256x256, and 512x512. Providing additional sizes is supported, while non-positive values are rejected.

Does transparency preserve alpha?

Yes. If the input PNG has transparency, 32-bit depth is used to preserve the alpha channel in all embedded sizes. If no transparency exists, 24-bit depth is used by default.

Can I convert animated PNGs or non-PNG sources?

The tool accepts PNG inputs only. Animated PNGs are not supported, and inputs must be single-frame PNG images. Non-PNG sources must be converted before use.

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