What Favicon Sizes Do You Actually Need in 2026?
A "favicon" used to mean one tiny 16×16 image. Today it means a whole small set of icon sizes spread across browser tabs, phone home screens, bookmarks and search results — miss the right one and your site shows a generic blank square in exactly the spot meant to build recognition.
The classic browser tab icon
The small icon in a browser tab and next to a bookmark is the original favicon, displayed at roughly 16×16 to 32×32 pixels depending on the browser and display density. Because it's shown so small, this is the one size where fine detail simply won't survive — a busy logo with small text reads as a smudge at 16 pixels, while a simple, high-contrast shape stays legible.
Phone home-screen icons
When someone adds your site to their phone's home screen, it needs a much larger dedicated icon than the tab favicon — commonly 180×180 for iOS (referenced via an apple-touch-icon link tag) and a range of sizes for Android, often provided through a web app manifest. Reusing the tiny 16×16 tab icon here just scales it up and blurs it; this size needs its own properly-sized export.
Other places an icon shows up
- Search results — Google shows a small favicon next to organic results, generally preferring a square icon in the 48×48 range or larger.
- Browser bookmarks and history — usually reuse the same small icon shown in the tab.
- Windows pinned sites and shortcuts — can reference larger icon sizes, up to 256×256, embedded inside the .ico file itself.
- PWA install prompts and app switchers — often want even larger sizes still, commonly 512×512, defined in the web app manifest.
Why the .ico format still exists
Every current browser accepts a plain PNG favicon directly (and most also accept SVG), so a modern site doesn't strictly need an .ico file at all. It sticks around mainly for two reasons: browsers and bots that still look for /favicon.ico by default (very old browsers never learned to read anything else), and Windows itself, which references .ico files for things like pinned taskbar sites. Unlike a PNG, a single .ico file can actually bundle several different resolutions (16×16, 32×32, 48×48 and so on) inside one file, letting the requesting context pick whichever size fits — which is genuinely useful even if most modern usage has moved on to individually-sized PNGs referenced by separate link tags.
Starting from one source image
The practical approach is to design (or export) one source image large enough to downscale cleanly to every size you'll need — 512×512 is a safe, common starting point — then generate each specific required size from that one source rather than trying to make a single file serve every context. A simple, high-contrast mark with minimal fine detail survives the trip down to 16×16 far better than a detailed illustration, so it's worth designing (or simplifying) with the smallest size in mind, not just the largest.
Frequently asked questions
Do I really need a .ico file, or is PNG enough?
Every modern browser accepts a plain PNG favicon. The .ico format is mainly kept for very old browser compatibility and for Windows' own use of favicons outside the browser, such as pinned site shortcuts.
What size favicon does Google use in search results?
Google generally looks for a square icon and prefers something in the 48x48 range or larger for its search-result favicon, separate from whatever size actually displays in the browser tab.
Why does my icon look fine in the browser tab but blurry on a phone home screen?
The browser tab typically only needs 16x16 or 32x32, but a phone home-screen icon needs a much larger dedicated size (commonly 180x180 for iOS) — reusing the tiny tab icon there just scales it up and blurs it.
Can one image work for all these sizes?
You need one source image large enough to downscale cleanly (512x512 is a safe starting point), but that single source should still be exported at each specific required size rather than relying on one file to serve every use.