ICO to WebP Converter
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Supports: ICO
Advanced Options - Our defaults are optimized for the best results. We recommend you keeping the defaults unless you have a specific need.
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Need help?How to Convert ICO to WebP Online
- Upload Your ICO Files — Drag and drop or select one or more ICO (Windows Icon) files.
- Choose a Quality Preset — Select from Highest, Very High (Recommended), High, Medium, Low, Very Low, or Lowest.
- Adjust Resolution (Optional) — Keep original, reduce by percentage, pick a preset (4320p down to 144p), or enter exact width and/or height.
- Convert & Download — Click Convert and download your WebP images.
Why Convert ICO to WebP?
ICO files often contain multiple resolutions packed into a single file (16×16, 32×32, 48×48, 256×256), which makes them unnecessarily large for web use. WebP is Google's modern image format that delivers 25–35% smaller files than PNG while preserving full transparency. Converting ICO to WebP gives you a lightweight, web-optimized image that loads faster and is supported by all modern browsers — ideal for replacing traditional ICO favicons with modern WebP alternatives.
ICO vs WebP
| Feature | ICO | WebP |
|---|---|---|
| Primary use | Windows icons, favicons | Web images, modern favicons |
| Multi-resolution in one file | ✅ | ❌ (single resolution) |
| Transparency | ✅ | ✅ (alpha channel) |
| Compression | Minimal | Lossy or lossless, 25–35% smaller than PNG |
| Browser support | Favicon only | ~97% (Chrome, Firefox, Safari 14+, Edge) |
| File size (32×32 icon) | ~4–15 KB | ~1–3 KB |
Use Cases
- Modern favicons — Replace ICO favicons with WebP for faster page loads. Use
<link rel="icon" type="image/webp">in your HTML. - Web graphics — Extract icon artwork from ICO files as WebP for use in web applications, dashboards, and UI components.
- Icon libraries — Convert collections of Windows ICO icons to WebP for use in web-based icon pickers or design tools.
- Email signatures — WebP icons are smaller than ICO, reducing email size and improving load times in web-based email clients.
Will WebP preserve the ICO transparency?
Yes. WebP fully supports alpha-channel transparency. Transparent areas in your ICO file are preserved in the WebP output.
Which resolution from the ICO file is used?
The converter extracts the largest resolution available in the ICO file. If the ICO contains 16×16, 32×32, and 256×256, the 256×256 version is used. You can then resize using the Resolution options.
Can I use WebP as a favicon?
Yes. Modern browsers support WebP favicons via <link rel="icon" type="image/webp" href="favicon.webp">. For older browser compatibility, keep an ICO fallback.
How much smaller will the WebP file be?
Typically 50–80% smaller than the original ICO, depending on the icon complexity and number of resolutions stored in the ICO file.
Does this accept multi-resolution ICO files?
Yes. ICO files containing multiple sizes (16×16, 32×32, 48×48, 256×256) are accepted. The largest resolution is extracted for conversion.