AVIF to ICO Converter

Summary

Upload an AVIF image and instantly download a multi-size .ico file (16, 32, 48, 64 px) — no server, no account needed.

How it works

1. Click "Choose AVIF File" and select any .avif image from your device.
2. The tool renders the AVIF onto four Canvas elements at 16x16, 32x32, 48x48, and 64x64 pixels.
3. Each canvas is read as raw RGBA pixel data and encoded as a 32-bit BMP DIB bitmap.
4. A valid ICO file header is assembled in memory, referencing all four bitmap images.
5. The finished .ico binary is offered as an instant browser download — no upload, no server.

Use cases

• Create a multi-resolution favicon.ico from an AVIF logo or artwork.
• Package an AVIF graphic as a Windows desktop or taskbar icon.
• Convert an AVIF to ICO for use in Electron or desktop application projects.
• Produce a quick icon asset from an AVIF source without installing image editors.
• Generate multiple icon sizes from a single AVIF file in one step.
• Prepare icons for browser extension manifests that require .ico format.
• Repurpose modern AVIF web graphics as legacy-compatible ICO icons.

Frequently Asked Questions