Convertidor ICO Gratuito en Línea
Convierte PNG o JPG a formato ICO para favicons de Windows.
ℹ️ Exports a pixel-perfect ICO file at your chosen size. Compatible with all browsers and operating systems.
Frequently Asked Questions
What is an ICO file and when do I need one?
ICO is a Windows image container format that stores multiple icon sizes in a single file. It's required for Windows application icons (.exe files), desktop shortcuts, and as the original website favicon format (favicon.ico).
What is the maximum image size I can upload?
The tool accepts source images up to 10 MB. The output .ico file will be much smaller — typically 10–150 KB depending on selected sizes. For best quality, use a source image of at least 256×256 pixels.
Should I use ICO or PNG for my website favicon?
Use both. Place a favicon.ico at your site root (required by legacy browsers and some RSS readers), and also add <link rel="icon" href="favicon.png" type="image/png"> for modern browsers that support PNG favicons directly.
Does the ICO file support transparency?
Yes. ICO files support alpha transparency (32-bit color + alpha). Upload a PNG with a transparent background and the transparency is preserved in the converted ICO file.
What size should I include in my ICO for a Windows application?
For Windows desktop apps: include 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256. Windows uses different sizes at different UI scales and display contexts.
Is the Convertidor ICO free to use?
Yes, the Convertidor ICO on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.
How does the Convertidor ICO work?
Convierte PNG o JPG a formato ICO para favicons de Windows. No data is sent to a server — everything runs locally in your browser for maximum privacy and speed.
Do I need to install anything to use the Convertidor ICO?
No installation needed. The Convertidor ICO runs entirely in your web browser on any device — desktop, tablet, or mobile.
Is my data safe when using the Convertidor ICO?
Completely safe. The Convertidor ICO processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.
Does the Convertidor ICO work offline?
After the page loads for the first time, the Convertidor ICO works without an internet connection for all client-side processing. Tools that fetch live external data (such as DNS or network lookups) require an active connection.
What image formats does the Convertidor ICO support?
The Convertidor ICO works with common image formats supported by your browser, including JPEG, PNG, WebP, and GIF. SVG support varies by tool. No format conversion plugin or driver is needed.
Does the Convertidor ICO work with large image files?
Yes. The Convertidor ICO processes files entirely in your browser using the Canvas API. Very large files (over 20 MB) may take a few extra seconds on older or lower-powered devices. Closing other tabs can free up memory for better performance.
Does the Convertidor ICO work on all browsers?
Yes. The Convertidor ICO is built with standard browser APIs and works on all modern browsers including Chrome, Firefox, Safari, and Edge — on both desktop and mobile. No plugins, extensions, or third-party software are required.
How do I save or export my results from the Convertidor ICO?
Select and copy the result text to paste into any document or app. For image tools, a Download button saves the file directly to your device. Your browser's built-in screenshot function also captures results quickly. No account or login is required.