Upload any image (PNG, JPG, SVG) and convert it into properly formatted favicon files. Choose between contain, crop, or stretch scaling modes and adjust the size from 0–200%. Add rounded corners, apply a color tint to the icon, or place it on a solid background color. Preview your favicon in a light and dark browser tab mockup before downloading. The tool generates both .ico (for legacy browser support) and .png formats at 96×96 pixels. Everything runs in your browser — your image never leaves your device.
TonniTools is built to run locally in your browser. Since no data ever leaves your device, everything works, even without internet.