What is the ICO Converter?
The ICO Converter is a powerful browser-based tool that takes your standard images (PNG, JPG, WebP, or SVG) and packages them into a multi-resolution `.ico` file. The ICO format is the historical and still widely used standard for website favicons. By embedding multiple sizes (such as 16x16, 32x32, and 48x48) into a single file, browsers can intelligently select the most appropriate resolution for the user's display, ensuring your logo looks crisp on both standard monitors and high-DPI retina screens.
Our tool performs this complex packaging process directly within your browser using JavaScript and HTML5 Canvas, requiring no server uploads and ensuring complete privacy.
Step-by-step How to Use
- Click the "Choose File" button to upload your source image. A square image with a transparent background (like a PNG) yields the best results.
- Select the resolutions you want to include in the ICO file. We recommend checking 16x16, 32x32, and 48x48 for maximum compatibility.
- Click the "Generate .ICO" button to start the packaging process.
- Once complete, a "Download ICO" link will appear. Click it to save your new `favicon.ico` file.
- Upload the file to your website's root directory and add the appropriate `` tag to your HTML header.
Key Features
- Multi-Size Support: Embed multiple resolutions into a single file, allowing the OS or browser to pick the best fit.
- Broad Format Acceptance: Upload PNG, JPG, WebP, or SVG files to use as your base image.
- 100% Client-Side: All image processing and binary file generation occur locally in your browser memory.
- No Data Tracking: Your brand assets and logos are kept completely private and are never sent to a remote server.
Real-World Industry Applications
Web developers and designers need `.ico` files to establish a website's identity in browser tabs, bookmarks, and search engine results. While modern browsers also support `.png` or `.svg` favicons, `.ico` remains the ultimate fallback for legacy systems and specific enterprise environments. Providing a multi-size `.ico` ensures that when a user bookmarks your site on an older desktop OS, the icon scales gracefully without pixelation.
Client-Side Privacy Guarantee
We respect the confidentiality of unreleased brand assets. Because this tool utilizes native browser APIs to manipulate image data and construct the binary `.ico` format locally, your files never leave your device. There is zero risk of data interception or unauthorized storage.
Frequently Asked Questions
- Why do I need multiple sizes in one file?
- Different contexts require different sizes. A browser tab might use 16x16, a desktop shortcut might use 32x32, and Windows Explorer might use 48x48. Packing them all in one file ensures your logo looks sharp everywhere.
- What is the best format to upload?
- A high-resolution PNG with a transparent background is ideal, as the transparency will be perfectly preserved in the resulting `.ico` file.
- Does this tool support 256x256 icons?
- Currently, we focus on the core web sizes (16, 32, 48) for optimal file size, but larger formats can be supported in advanced settings.
- Is it safe for proprietary logos?
- Absolutely. Since everything runs locally, your proprietary designs are completely safe from server-side logging or theft.