Privacy Model100% In-Memory Sandbox · Zero Server Uploads
Format StandardsPNG, JPEG, WebP, SVG, ICO Specifications
Execution SpeedZero Network Latency · Instant Local Output
Frequently Asked Questions
What is a multi-resolution .ico file?
A proper .ico file packages several resolution versions of your icon (16px for browser tabs, 32px for desktop shortcuts, 48px for taskbars) into a single file.
What source image should I upload for the best favicon?
Upload a square (1:1 aspect ratio) transparent PNG of at least 256×256 or 512×512 pixels with simple, recognizable shapes.
Is the generated .ico compatible with all web browsers and Windows?
Yes. The output matches standard Microsoft ICO binary format with embedded PNG frames supported by all browsers and Windows 10/11.