Convert PNG to ICO in seconds and generate multi-size favicon icons (16×16 to 256×256) in one file — fast, secure, and fully in your browser.
Turn any PNG image into a professional ICO file with multiple icon sizes included in a single file. This tool is designed for developers, designers, and anyone who needs a favicon or Windows icon instantly.
Unlike basic converters, Toolnox creates a multi-size ICO file, meaning one file works across browsers, desktop apps, and operating systems.
Generate a single ICO file that includes:
Your images are processed directly in your browser.
Nothing is uploaded or stored on any server.
Convert multiple PNG files at once and download them individually or as ZIP.
This tool is ideal if you want to:
One ICO file = works everywhere.
That’s it — no settings, no complexity.
Your ICO file can include:
These sizes ensure compatibility across all platforms and devices.
Even today, ICO is required for:
Using a proper ICO file ensures sharp rendering on all devices.
Yes, it’s completely free with no limits.
Yes, one ICO file contains multiple icon sizes in a single file.
Absolutely. This tool is perfect for generating favicon icons.
No. Everything runs in your browser for maximum privacy.
16×16 and 32×32 are standard, but including all sizes is recommended.
Use these tools together to optimize your images workflow.