ICO Converter – Free Online Image to Icon Converter (PNG, JPG, WebP to ICO)
Create Windows icons (.ico) and favicons from any image – PNG, JPG, or WebP. Our free online ICO converter lets you choose multiple icon sizes (16×16 to 256×256), preserves transparency, and generates a single ICO file containing all selected resolutions. Perfect for web developers creating favicons, software developers making application icons, or designers converting logos. All processing happens entirely in your browser – no upload, no signup, no watermarks. 100% Browser‑Based No Upload Multi‑Size ICO
✨ ICO Converter – Complete Feature List
| Feature | Description | |
|---|---|---|
| Any image to ICO | Convert PNG, JPG, WebP (and others) to Windows .ico format – ideal for favicons and Windows applications.BNB | —?—?但 |
| Multiple icon sizes | Choose from standard Windows sizes: 16, 32, 48, 64, 128, 256 pixels. The ICO file can include several resolutions in one file.BNB | —?—?但 |
| Preserve transparency | Fully respects the alpha channel of PNG images – transparent areas become transparent in the icon.BNB | —?—?但 |
| Side‑by‑side preview | See your original image and a preview of the largest generated size (256×256).BNB | —?—?但 |
| File size statistics | Shows original file size, final ICO size, and how many sizes are included.BNB | —?—?但 |
| Drag & drop upload | Drop any image onto the upload zone.BNB | —?—?但 |
| Click to browse | Traditional file picker.BNB | —?—?但 |
| One‑click download | Save the .ico file with the original name (e.g., myicon.ico).BNB | —?—?但 |
| Dark / Light mode | Theme toggle stored in localStorage.BNB | —?—?但 |
| Fully responsive | Works on desktop, tablet, and mobile devices.BNB | —?—?但 |
| 100% client‑side | No upload, no server, no API – your images stay private.BNB | —?—?但 |
🔒 Privacy & Security
- Zero upload – All encoding happens locally using the canvas API and a custom ICO encoder.
- No external dependencies – No libraries, no API calls.
- Unlimited usage – Free forever, no signup required.
💡 Use Cases
- Web developers – Create favicons for websites (ICO files are still widely used).
- Software developers – Generate application icons for Windows programs.
- Designers – Convert logos and graphics into icon format with precise control over sizes.
- System administrators – Prepare custom folder or shortcut icons.
Why Choose Our ICO Converter?
Creating valid .ico files manually is complicated – you need special software or online services that often upload your images. Our tool does everything in your browser using pure JavaScript. You can select one or multiple standard icon sizes (16×16, 32×32, 48×48, 64×64, 128×128, 256×256). The final ICO file will contain all selected sizes, making it compatible with Windows from XP to 11 and browsers that still rely on favicon.ico. The interface includes a live preview of the largest size, file size stats, and a one‑click download. No watermarks, no limits, and your images never leave your computer.
📖 How to Convert an Image to ICO (Step by Step)
- Upload your image – drag & drop or click to browse (PNG, JPG, WebP supported).
- Select icon sizes – check the boxes for the resolutions you need (16, 32, 48, 64, 128, 256 pixels).
- Click “Convert to ICO” – the tool processes the image in your browser using canvas and a custom ICO encoder.
- Preview the result – see the largest generated size and file size statistics.
- Download the ICO file – one click saves the .ico file with the original filename.
- Toggle dark/light mode – for comfortable use at any time.
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🌟 Our Brands & Network
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- OnlineFreeConverters – Fast, secure conversion & analysis tools.
- AI Tools Hub – Cutting‑edge AI utilities for writers & developers.
- PrivacyFirst Apps – Tools that never store or share your data.
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❓ Frequently Asked Questions
What image formats can I convert to ICO?
You can convert PNG, JPG, JPEG, and WebP images. PNG is recommended if you need transparency (e.g., for a favicon with a transparent background).
What icon sizes should I choose?
For a modern favicon, including 16×16, 32×32, and 48×48 is enough. For Windows application icons, 256×256 is recommended (Windows 10/11 uses high‑resolution icons). The tool lets you pick multiple sizes; they all go into one .ico file.
Does this tool work with transparent backgrounds?
Yes. PNG images with alpha channels are fully supported – the resulting ICO will preserve transparency. JPG images have no transparency and will appear with a white background.
Are my images uploaded to a server?
Never. All processing happens locally in your browser using the canvas API and a custom ICO encoder. Your images never leave your device.
Can I create an ICO file larger than 256×256?
Standard Windows icons support sizes up to 256×256. For favicons, 256×256 is rarely needed; we recommend staying within the sizes provided (16–256).
What is the ICO Format and Why Is It Still Used?
The ICO (icon) file format is the standard for application icons on Microsoft Windows and for website favicons in many browsers. Although newer formats like SVG and PNG are sometimes used for favicons, older browsers and Windows systems still rely on .ico files. An ICO file can contain multiple resolutions and color depths within one file – Windows automatically chooses the best size for the current display. Our converter gives you full control over which sizes to embed, ensuring your icon looks sharp on everything from old CRT monitors to 4K screens.
No signup, no API keys, no watermarks. Start now!
Disclaimer: All processing is client‑side; no server involvement. The generated ICO file conforms to the Windows icon format. For best results, use PNG images with transparency.