Test your favicon before you deploy it. Drop in an icon file and instantly see how it looks in light and dark browser tabs, a Google search result, the bookmarks bar, and iOS and Android home screens - all in your browser, nothing is uploaded. Testing a live website instead? Use the Favicon Checker. Need to create the icon first? Try the Favicon Generator or make one from your initials with Text to Favicon.
Once you are happy with the icon, generate the complete deployable set with the Favicon Package Generator, and after publishing, validate the live setup with the Favicon Checker.
A favicon that looks great as a 512px design file can fail in the real world: details vanish at the 16x16 size browser tabs actually use, dark icons disappear against dark browser themes, and Google crops everything into a small circle next to your search results. Since Google displays favicons beside every result, an unreadable icon costs you recognition - and clicks - on the exact surface where you compete with every other site.
Previewing catches these problems in seconds, before your visitors do. If the 16px preview turns to mush, simplify the design or switch to a bold initial with the Text to Favicon generator. If your source image is the wrong size or not square, fix it with the Favicon Resizer, or convert a logo into proper ICO format with the PNG to ICO converter.
ICO, PNG, SVG, JPG, GIF, WEBP and BMP. Anything your browser can decode as an image will render in the mockups, including multi-size .ico files. To inspect every embedded size of an ICO individually, use the ICO Viewer.
No. This tool runs entirely in your browser - the file is read locally, rendered into the mockups, and never leaves your computer. You can even use it offline once the page has loaded.
Favicon Preview tests an icon file before you deploy it - you see how it will look in tabs, search results and home screens. The Favicon Checker tests a live website - it fetches your published pages and validates that every favicon tag and file is correctly installed.
A modern set includes a multi-size favicon.ico (16, 32, 48), favicon-16x16.png and favicon-32x32.png for browser tabs, a 180x180 apple-touch-icon for iOS, and 192x192 plus 512x512 android-chrome icons. You can generate the complete set from one image with the Favicon Package Generator.
Browser tabs render favicons at 16x16 pixels, so fine details and thin lines get smoothed away during downscaling. Simple, bold shapes survive best. If your design is too detailed, consider a simplified mark or a letter favicon made with Text to Favicon.
Dark or transparent icons can become invisible against dark browser themes. Add a contrasting background shape, an outline, or a solid backdrop color so the icon stays visible in both light and dark contexts.