Convert PNG to ICO
Convert PNG files to standard website favicon ICO formats in your browser memory. 100% secure, zero file uploads.
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What is an ICO file?
An ICO file is an image file format that contains computer icon resources. Most commonly, it is used by web developers as a website favicon (short for favorite icon). The ICO format is unique because it can hold multiple images at different dimensions (like 16x16, 32x32, and 48x48) in a single file container, allowing the browser to select the ideal size automatically.
Frequently Asked Questions
How does Pixiva pack ICO files?
Unlike basic converters that simply change the file extension, Pixiva features a built-in Javascript binary structure writer. It compiles a legitimate 6-byte directory header and directory entry, packing raw PNG pixels inside the generated binary array buffer, outputting standard-compliant `.ico` files.