What is inside a standard .ico favicon file?

An .ico file contains a directory header followed by multiple image frames in varying pixel dimensions (from 16x16 to 256x256) used by operating systems for display flexibility.

Does extracting a PNG from an ICO preserve transparency?

Yes. Unpacked PNG assets retain full 8-bit alpha transparency and anti-aliased edge smoothing.

Is my favicon file uploaded to any remote server during extraction?

No. Zapixal parses the binary ICO file structure locally in your browser’s memory.

Unpack Multi-Resolution ICO Favicons into Transparent PNGs

Name: Zapixal - Unpack Multi-Resolution ICO Favicons into Transparent PNGs
Availability: InStock
Author: Zapixal

Extract embedded resolution frames from Windows ICO favicon containers into clean 32-bit transparent PNGs locally in browser RAM.

Drop ICO here, or choose files

ICO

Batch processing supported•Ctrl+Vto paste

Binary Directory Extractor

Unpacking multi-resolution Windows ICO directory headers into clean transparent PNGs

Favicon files (.ico) are composite binary containers that pack multiple embedded image resolutions (such as 16x16, 32x32, 48x48, 64x64, and 256x256 pixels) into a single file header structure. When developers or designers try to edit an `.ico` file in standard photo editing tools, the software usually opens only the smallest 16x16 pixel thumbnail or fails to parse the directory block entirely. Zapixal includes a custom C-compiled WASM binary reader that parses the ICONDIR and ICONDIRENTRY headers, extracting all embedded resolution layers into individual 32-bit transparent PNG assets.