WEBP → ICO Converter

Create a Windows .ico from a .webp image. Works entirely in your browser; nothing is uploaded.

Drag & Drop your .webp file here, or pick a file below. Nothing is uploaded.

Preview will appear here after loading a WEBP.

Image:

ICO sizes:

Icon Sizes (pixels)

Tip: 16-64 px covers most app and favicon cases; 256 px is for high-DPI.

Preserve transparency

If unchecked, a solid background color is applied before encoding.

Background color (if not transparent)

Fit mode

Output file name

WEBP ? ICO - Quick Cheat Sheet

ICO supports multiple sizes in one file. This tool packs all checked sizes into a single .ico.
Max icon dimension is 256x256 px per entry. Common set: 16, 32, 48, 64, 128, 256.
Transparency: Preserved by storing each icon as PNG-in-ICO. Uncheck to fill a solid background.
WEBP animations: Only the first frame is used. This is standard for favicons/app icons.
Fit modes: Contain letterboxes; Cover crops; Stretch ignores aspect ratio.
Privacy: Conversion runs entirely in your browser. No images are uploaded.

How this works (technical)

The WEBP is decoded by your browser and drawn to a canvas at each requested size.
Each canvas is encoded to PNG; the final .ico is constructed with an ICONDIR header, one ICONDIRENTRY per size, and the PNG blobs appended.
Widths/heights of 256 are stored as 0 in the ICO directory entry (per spec).