Google's favicon rules are simple, and one change to its documentation makes them clearer. Google now lists the exact file formats it supports: BMP, GIF, ICO, PNG, JPEG, PPM and TIFF. If your small business icon is missing or wrong in search results, a short checklist usually finds the cause.
This post explains what the rules say, why they matter to a business, and how to check your own site in about fifteen minutes. It applies to businesses in the United States, the United Kingdom, Australia and Canada alike.
What changed in Google's documentation
Google's Search Central changelog shows that on August 28, 2026, the company updated its favicon documentation. The update lists supported file formats directly. Before, the page pointed to external references, which left some owners unsure whether their file type would work.
The core rules did not become stricter. The update removes guesswork. You can now read one page and know whether your file qualifies.
Why a tiny icon matters to a business
A favicon is the small square image that appears next to your site name in search results and in browser tabs. It is one of the first things a searcher sees. A clear icon helps people recognize your business and tell it apart from similar names.
A missing icon shows a generic placeholder instead. That looks unfinished, and it can make a real business seem less established than it is.
The rules, in plain language
Google's documentation sets out a short list of requirements. Here is what each one means for you.
- Supported formats: BMP, GIF, ICO, PNG, JPEG, PPM and TIFF.
- Shape and size: The image must be square and at least 8 by 8 pixels. Google recommends larger than 48 by 48 pixels.
- Link tag: Your home page needs a tag in the head section, such as <link rel="icon" href="/path/to/favicon.ico">. The values icon, shortcut icon, apple-touch-icon and apple-touch-icon-precomposed are supported.
- Crawl access: Googlebot-Image must be able to crawl the icon file. Googlebot must be able to crawl your home page.
- Stable address: The icon URL should not change often.
- Appropriate content: Google will not show an icon it considers inappropriate. It uses a default icon instead.
The link tag can use a relative path, a full address, or a URL on a content delivery network. That flexibility helps if your web team stores images on a separate service.
A fifteen-minute favicon checklist
Work through these steps in order. Most problems appear in the first three.
- Confirm the file exists. Open the icon address in your browser. If you see an error page, the file is missing or the path is wrong.
- Check the shape. Make sure the image is square. A wide logo squeezed into a square becomes unreadable at small sizes.
- Check the size. Use a file larger than 48 by 48 pixels. A larger source image scales down cleanly.
- View your home page source. Look for the icon link tag in the head section. Confirm the address in the tag matches the real file.
- Review your robots file. Make sure rules do not block your image folder or your home page. A blocked icon file will not be used.
- Test on a phone and a desktop. Check the browser tab on both. A design that works at large size may turn into a blur at small size.
- Request a recrawl if needed. Use the URL Inspection tool in Search Console for your home page after you fix a problem.
Design tips for a small icon
A favicon is tiny, so simple wins. A full logo with a business name usually cannot be read at that size. Pick one letter, one shape or one symbol from your brand.
Use strong contrast between the shape and the background. Test the icon against both light and dark browser themes. If your logo is dark on a transparent background, it may vanish in dark mode.
Keep the same icon over time. Google asks for a stable address, and a steady image helps repeat visitors recognize you.
Common reasons an icon does not appear
Several simple faults cause most missing icons. Knowing them saves time when you talk to your web team.
- The link tag points to an old file path after a site redesign.
- A security plugin or server rule blocks image crawlers.
- The icon is on a different address than the one the tag lists.
- The file is not square, so it looks distorted.
- The change is recent. Google says crawling can take from several days to several weeks.
That last point matters. If you fixed the problem yesterday, patience is part of the process. Use the inspection tool to speed things up, and check again in a week or two.
What to tell your web team or agency
Keep the request short. Ask them to confirm the icon file is square and larger than 48 by 48 pixels. Ask them to confirm the link tag is on the home page and that crawlers can reach both the page and the file.
Also ask them to keep the icon address the same after future site updates. Many icons disappear during a redesign or a move to a new host, because the old file path is dropped without anyone noticing.
The bottom line
A favicon will not change your rankings on its own. Google's documentation describes it as an appearance feature. Still, it is a low-cost fix that makes your listing look complete and trustworthy.
Set a reminder to recheck it after every redesign, hosting change or security plugin update. One quick look at your search listing and your browser tab can catch the problem early.
Sources
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Frequently Asked Questions
Which file formats does Google Search support for favicons?
Google's documentation lists BMP, GIF, ICO, PNG, JPEG, PPM and TIFF. Most business sites use ICO or PNG, and either one is fine.
How big should my favicon be?
Google says the file must be square, with a 1:1 ratio, and at least 8 by 8 pixels. It recommends going larger than 48 by 48 pixels so the icon looks sharp on different surfaces.
How long until a new favicon shows in Google Search?
Google says crawling can take from several days to several weeks. You can request faster processing with the URL Inspection tool in Search Console.
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