PNG to ICO Converter

This tool converts a PNG image into a Windows ICO icon file. It accepts one PNG input and outputs an ICO containing multiple embedded sizes suitable for desktop icons and app tiles. It preserves transparency and color fidelity by re-encoding the image into the ICO format, without rasterizing the alpha channel.
Core logic reads the PNG, validates pixel data, rescales to target sizes (e.g., 16, 32, 48, 256), and prints a single ICO container with multiple image entries. It supports 24-bit or 32-bit color depth as allowed by the ICO specification and preserves the alpha channel during embedding. No upscaling beyond target sizes unless requested; quality is maintained via standard resampling filters.
Audience includes software developers, UI/UX designers, and branding teams who need consistent Windows icons across apps and websites. The tool reduces manual steps, enforces correctness of icon sets, and requires no account. It is suitable for packaging software, creating favicon-like ICOs for Windows, or distributing app branding assets across platforms.
Distinct value lies in embedding multiple sizes into a single ICO, maintaining transparency, and providing a straightforward configuration for sizes that align with Windows guidelines.