Convert PNG to ICO in Browser — Transparent Favicon & App Icon Tool

Convert PNG to Transparent ICO File in Your Browser

Need a `favicon.ico` for a web app or an `.ico` desktop icon for a Windows executable? Drop any transparent PNG into the converter below to generate a spec-compliant ICO file (capped automatically at 256×256 px) right in your browser.

Drop an image here or click to choose SVG, PNG, JPEG, WebP, GIF, BMP, TIFF, ICO, HEIC, PSD, TGA, DDS & more

Why convert PNG to ICO?

Renaming `icon.png` to `favicon.ico` is a common mistake that causes rendering failures in Windows Explorer and older parsers because the binary ICO header directory is missing. Proper PNG-to-ICO conversion wraps the RGBA bitmap inside a valid ICONDIR container.

Private by design: zero uploads

Runs entirely client-side via WebAssembly—no watermarks, no sign-ups, and no server uploads.

Frequently asked questions

What if my source PNG is not square?

You can set the Resize dropdown to 'Cover (crop to size)' and enter equal width and height values (such as 256×256) to center-crop your rectangular PNG into a clean square icon.

trsf.it