Convert AVIF to ICO
Turn AVIF images into Windows icons and favicons. Perfect for branding and web development.
ToFormat — free online converter
Upload your files
Max file size: 30MB · Up to 20 files at once
Why ToFormat?
Multi-Size ICO
Generate ICO files with multiple resolutions (16×16 to 256×256) from a single AVIF. All sizes stored in one file — ideal for Windows icons.
Transparency Support
AVIF supports alpha transparency; ICO fully retains it. Your icons with transparent backgrounds stay transparent.
Favicon Ready
Create favicon.ico for your website. Browsers automatically pick the right size from the multi‑resolution ICO.
About the Formats
🚀 What is AVIF?
AVIF (AV1 Image File Format) is a next‑generation format based on the AV1 video codec. It offers up to 50% better compression than JPG, supports HDR, wide color gamut, and transparency. AVIF is great for modern websites but not directly usable as Windows icons.
All AVIF conversion tools →🖱️ What is ICO?
ICO is the icon format used by Microsoft Windows and for website favicons. It can store multiple image sizes in one file, with support for transparency (1‑bit and 8‑bit alpha). Created in the 1980s, it remains essential for branding.
All ICO conversion tools →How to Convert
Upload AVIF
Drag and drop your AVIF files. You can upload up to 20 at once.
Choose icon sizes
Select which resolutions to include (16, 32, 48, 64, 128, 256). Default includes all standard sizes.
Download ICO
Your ICO files are ready. Download individually or as ZIP. Files auto‑delete in 10 minutes.
When to Convert AVIF to ICO
🌐 Website Favicon
Every website needs a favicon.ico. Convert your AVIF logo to ICO and place it in your site root — works in all browsers.
💡 For modern formats: try AVIF to PNG →💻 Windows Applications
Desktop apps require ICO icons for executables and shortcuts. Convert AVIF to ICO for professional software packaging.
💡 macOS icon: AVIF to ICNS →📁 Folder Icons
Customize folder icons on Windows. Convert any AVIF image to ICO and assign it via folder properties.
💡 Linux icon: AVIF to PNG →🎨 UI Design
Designers often need ICO exports for mockups and prototypes. Convert AVIF to ICO for client deliveries.
💡 Vector source: AVIF to SVG →Format Comparison
| Format | AVIF | ICO |
|---|---|---|
| Compression | Lossy | Lossless |
| Transparency | Yes | Yes |
| File Size | Smaller | Larger |
ICO is specialized for icons. For general purpose images, AVIF to PNG or AVIF to JPG are better choices. For macOS icons, try AVIF to ICNS.
💡 Pro Tips
- Include 16, 32, and 48px sizes at minimum — they cover most Windows display settings and favicon use.
- For highest quality, start with a square AVIF image. ICO works best with square proportions.
- ICO supports 8‑bit transparency (256 levels) in 32‑bit mode. We preserve full alpha from your AVIF.
- If your AVIF is animated, only the first frame will be used — ICO is static.
- Browsers request favicon.ico automatically. Place the file in your root directory for instant branding.
- For Retina displays, include 64×64 or 128×128 sizes — they scale better on high‑DPI screens.
- You can also convert ICO back to AVIF with our ICO to AVIF converter for web use.
How AVIF to ICO Conversion Works
ICO files are containers holding one or more bitmap images in different resolutions. When you convert AVIF to ICO, our servers decode the AVIF image, resize it to your chosen dimensions (preserving aspect ratio), and encode each size as a BMP‑like image inside the ICO container.
Transparency is handled via an alpha channel in 32‑bit icons. Because AVIF supports full alpha transparency, we can perfectly map that to the ICO’s alpha (if you choose 32‑bit). The result is a crisp icon with the same transparent background as your original AVIF.
The process is fast and server‑side. Files are automatically deleted after 10 minutes.
AVIF vs ICO: Different Purposes
AVIF is a compression‑focused format for web images. ICO is a container format specifically for icons and favicons. While AVIF offers better compression and HDR support, ICO is the only format universally recognized for Windows icons and website favicons.
Converting AVIF to ICO bridges the gap: you keep the source in a modern, efficient format, but deliver in the required legacy format where needed.
Best Practices for ICO Creation
Always include multiple sizes: 16×16 (small icons), 32×32 (standard), 48×48 (high‑DPI), and optionally 64×64, 128×128 for very high resolution. Modern Windows can scale down larger sizes, so including a 256×256 master ensures quality everywhere.
For favicons, 16, 32, and 48 are sufficient. Browsers will pick the best size automatically. Explore our ICO tools for more icon utilities.