Favicon guides

Short and practical: what a favicon needs to do today – and what it doesn't anymore.

• Favicon sizesWhich favicon sizes does a website need today? 16, 32, 48, 180, 192 and 512 pixels – plus SVG. Overview with purpose and code.
• ICO or SVGfavicon.ico or icon.svg? Pros and cons of both formats, browser support, dark mode – and why you should include both.
• Favicon not showingOld favicon in the browser or none at all? Cache, wrong paths, CMS settings, CDN – the most common causes and how to fix them in minutes.