Favicon Generator Guide
A professional guide to creating complete favicon sets for websites — which sizes are required, why modern browsers need multiple sizes, how to link them in HTML, and common mistakes to avoid.
What this tool is for
A favicon is the small brand icon that appears in browser tabs, bookmarks, and mobile home screens. Modern web development requires a comprehensive set of icon sizes — from 16x16 pixels for browser tabs to 512x512 for Progressive Web Apps — to ensure your website looks sharp and professional across every platform and device.
When you should use it
Whenever you are launching a new website, rebranding a project, or discovering that your current favicon appears blurry on high-resolution screens or doesn't show up correctly when users bookmark your site on their iPhone home screen.
Step-by-step instructions
- Upload your square logo or icon — ideally a transparent PNG at 512x512 pixels or larger.
- The tool generates all required favicon sizes (16x16 through 512x512) automatically.
- All files are bundled into a downloadable ZIP archive called 'favicon_pack.zip'.
- Extract the ZIP and place all files in your website's root directory or a dedicated /icons/ folder.
- Add the provided HTML link tags to your site's <head> section to reference each size.
How it works & Privacy
Your browser's native canvas rendering engine resamples your high-resolution source logo to each required dimension using bicubic interpolation — the same algorithm used by professional image editors. All resized versions are bundled into a ZIP using the JSZip library, entirely in your browser's memory.
Common Mistakes to Avoid
- Using a non-square source image — rectangular logos will appear distorted or cropped when forced into square favicon dimensions.
- Only providing a 16x16 icon — this will look blurry and pixelated on high-resolution Retina displays. Always generate the full size range.
- Using a complex logo with small text as a favicon — the text becomes unreadable at small sizes. Consider creating a simplified icon version for favicon use.
- Forgetting to link the favicon in your HTML — simply placing files in the root directory isn't enough; the HTML <link> tag tells browsers which file to use.
Frequently Asked Questions
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