Best Favicon Format: ICO, PNG, or SVG?
The best favicon format is usually a combination: favicon.ico for universal fallback, PNG for modern browser and mobile icons, and SVG for scalable modern support.
About Best favicon format
Favicon format choice affects browser support, image quality, file setup, and future compatibility. The practical answer is not ICO or PNG or SVG in isolation. Most production websites should use all three in a small, well-organized favicon set.
favicon.ico: The favicon.ico file is the legacy universal favicon format. Browsers automatically request /favicon.ico even when no HTML link tag is present. An ICO file can contain multiple image sizes such as 16x16, 32x32, and 48x48 in one container, which makes it useful as the broad fallback.
PNG favicon: PNG is the clearest modern raster favicon format. It supports transparency, works well for apple-touch-icon files, and is easy to generate from a logo or image. PNG favicons are usually linked individually, such as favicon-32x32.png or apple-touch-icon.png.
SVG favicon: SVG is scalable and can stay sharp at any size in supporting browsers. It is useful as a modern enhancement, especially for simple logos or icons. Because not every browser treats SVG favicons the same way, keep ICO and PNG fallbacks.
Recommended favicon format setup: 1. favicon.ico for legacy and automatic browser discovery. 2. favicon-32x32.png for modern browser tabs. 3. apple-touch-icon.png at 180x180 for iOS home screen shortcuts. 4. Android or web app manifest PNG icons at 192x192 and 512x512. 5. favicon.svg as optional progressive enhancement for scalable support.
If the question is about exact favicon image dimensions, use the favicon size and dimensions guide. If the question is specifically whether ICO or PNG is better, use the ICO vs PNG comparison. If your source file is PNG, use the PNG to favicon converter workflow.