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World desk14 min

How to Add or Update a Favicon So Bing Can Find It

Publish the new favicon, verify Bingbot can reach it, inspect and submit the affected URL in Bing Webmaster Tools, and allow days or weeks for Bing to recrawl. Exact Bing favicon format requirements are not formally published; the 16×16 root-file advice comes from a Microsoft Q&A Independent Advisor.
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To update the icon shown with your site in Bing, publish the replacement favicon, make sure Bingbot can crawl the icon and the pages that reference it, then use Bing Webmaster Tools to inspect and submit the changed URL. Bing may need days or weeks to recrawl the site, and neither submission nor IndexNow guarantees when a new favicon will appear in results.

What actually controls a favicon in Bing

A favicon is a small site icon that a search engine may show beside a result. Bing has to discover the page, crawl the page and its icon resource, process the change, and then refresh the search result. Updating a file on your server changes the source asset, but it does not force an immediate refresh of Bing’s stored result.

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Bing’s published Webmaster Guidelines and support material cover crawlability, rendering, sitemaps, URL discovery and indexing. They do not provide a favicon-specific format, pixel-size, or HTML-markup specification in the guidance available for this task. Treat any exact favicon dimensions or formats as practical advice rather than a Bing policy unless Bing publishes a dedicated requirement later.

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The most reliable workflow is therefore:

  • Replace or add the icon on the live site.
  • Keep the icon and the page that references it reachable by Bingbot.
  • Inspect and submit the changed page URL in Bing Webmaster Tools.
  • Use IndexNow if your publishing system can notify Bing automatically about URL changes.
  • Allow time for another crawl before deciding that the update failed.

Choose and publish the favicon

Use a simple, widely supported file

A Microsoft Q&A Independent Advisor’s answer to a favicon question recommends placing the icon in the site root and serving it as ICO, PNG, GIF or JPG at a minimum of 16×16 pixels. That answer was published on August 29, 2025, and is community troubleshooting advice, not a formal Bing specification. It is a sensible baseline when you need a conventional file that older templates and browsers can locate.

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If you are replacing an existing icon, keep the public URL stable when possible. Overwriting /favicon.ico is usually simpler than changing every reference to a new path: Bing can recrawl the same page and resource URL and your existing templates do not need a coordinated migration. If you do use a new filename, update every page template that points to the old file.

For example, if your site currently references /favicon.ico and you decide to publish /favicon.png, changing only the file on the server leaves the page pointing at the old location. Either replace the existing file at its current path or update the common page template and confirm that the new path is present in the live HTML. Choose one approach and keep it consistent rather than leaving several competing references in different templates.

Put the file at the root when following the advisor’s recommendation

Upload the asset to the web root so its address is the root-relative path /favicon.ico, /favicon.png, or the equivalent filename you selected. The root-directory placement is the Independent Advisor’s recommendation; Bing’s official general guidance does not state that a root location is mandatory.

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Confirm that the address is publicly reachable over the same site hostname that appears in Bing. An icon stored only on a local computer, behind a login, or on a private staging hostname cannot be processed as part of the public result.

Root-relative paths can also reduce ambiguity when a site has pages in nested directories. A reference such as /favicon.ico points to the root path, while a relative path without the leading slash may resolve differently depending on the page URL. The advisor’s root-file suggestion is a practical way to make the location easy to check; it should not be mistaken for an official Bing placement rule.

Reference the icon from your pages

Most sites reference a favicon in the document head. A conventional example is:

<link rel='icon' href='/favicon.ico'>

For a PNG file, the equivalent is:

<link rel='icon' type='image/png' href='/favicon.png'>

These snippets show a normal way to declare the resource; they are not a published Bing-specific requirement. Put the reference in the common head template so the homepage and important pages use the same current icon. After deployment, view the live HTML rather than only the source in your development environment and verify that the reference contains the final public path.

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If your site has multiple layouts, check each one rather than assuming a change to the homepage template updated every page. A CMS may have a separate theme setting, header include or static HTML template for some sections. The goal is to ensure the key public pages reference a valid, current icon URL, not simply that a file with a familiar name exists somewhere on the server.

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Check that Bing can crawl the icon and page

Review robots.txt and access controls

Bing’s guidance emphasizes crawlability: a crawler cannot process a resource it cannot reach. Check your site’s robots.txt for rules that disallow the favicon path, the directory containing it, or the page that links to it. Also review firewall, password, bot-management and hosting rules that might block Bingbot even when the page opens for you in a browser.

The favicon-specific Q&A advice also calls out checking robots.txt. This is troubleshooting guidance, not proof that every stale icon is caused by robots.txt. Remove a block only when you intend the corresponding public resource to be indexed or fetched, and test the resulting file after changing the rule.

Verify the live deployment

  • Open the exact favicon URL on the public hostname, not a development or preview hostname.
  • Confirm that the replacement graphic, rather than the old graphic, is being served.
  • Check the homepage and representative pages to ensure their icon reference points to the updated resource.
  • Make sure the site’s normal content and resources render reliably for crawlers, as Bing’s general guidelines require dependable access and rendering for discovery and indexing.

If your site uses a cache or content delivery layer, purge or invalidate the old asset according to that system’s normal deployment procedure. This is a hosting-side check: Bing cannot request a new image if the public URL continues to return the previous file.

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A successful browser test is useful, but it does not prove that Bingbot can fetch the same URL. A browser may be logged in, use a different network route, or have a cached copy of the icon. Check access controls and crawl rules as well as the visible image. If you recently changed the file but continue to see the previous artwork at its public URL, solve that serving or cache issue before asking Bing to recrawl.

Use Bing Webmaster Tools to investigate and notify Bing

Inspect the page that uses the favicon

Add and verify the site in Bing Webmaster Tools, then use its URL inspection facility for the homepage or another important page whose head contains the favicon reference. Inspection helps you investigate whether Bing can discover and process the URL; it is not a command to replace the icon immediately.

Inspect the actual canonical, public URL that appears in search. Inspecting a staging URL, a redirected variant, or a page blocked to crawlers will not diagnose the result that readers see. If the tool reports a crawl or access problem, fix that problem first and inspect again after the change is live.

Think of inspection as a diagnostic step: it can help reveal whether the page URL is available to Bing, but it does not certify that every resource referenced by the page has been fetched or that the search result will change at once. Keep the page and icon URLs handy when troubleshooting so you can distinguish a problem with the page from one with the image request.

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Submit the changed URL manually

Bing provides URL submission controls in Webmaster Tools. Submit the homepage or pages whose favicon reference changed after confirming that the new deployment is reachable. Manual submission can support discovery, but Bing does not promise that a submitted URL will be indexed or that its favicon will be refreshed on a particular schedule.

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Use IndexNow for automated change notification

Bing’s URL Submission guidance recommends IndexNow for automated notification of added, updated or deleted URLs. If your content management system or deployment pipeline supports it, configure IndexNow to notify Bing when the relevant page URLs change. A notification tells the search engine that a URL may need another crawl; it does not bypass crawlability checks or guarantee a search-result update.

The practical choice is about how you notify Bing, not a choice between guaranteed and unguaranteed display. An ordinary update depends on normal discovery and crawling. Manual submission is convenient for a key page or one-off update. IndexNow is better suited to a publishing process that can send notifications consistently as URLs change. All three approaches still depend on Bing being able to crawl and process the site.

Approach What it does When it fits What it cannot promise
Normal site update followed by recrawl Leaves Bing to discover the changed page through its ordinary crawling and discovery systems. A small site or a change already exposed through internal links and a sitemap. No fixed favicon refresh date.
Manual URL inspection or submission Lets you investigate a URL and notify Bing that it should be considered for crawling. When you have just changed a homepage or another key page and want a diagnostic or notification path. Submission does not guarantee indexing or a new icon in results.
IndexNow notification Automates URL-change notifications for added, updated or deleted URLs. Sites with a publishing system or deployment process that can send notifications consistently. It does not guarantee crawling, indexing or display timing.

How long a favicon update can take

The available Bing support guidance says a newly published or substantially revamped site may take a couple of weeks to be discovered and shown. The Microsoft Q&A Independent Advisor says a favicon refresh may take several days or weeks. These are broad expectations, not a favicon-specific service-level promise or measured average.

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Do not treat a successful submission as a countdown. Bing still has to recrawl the page and resource, process the change, and decide what to show in its results. A favicon can therefore remain old after the file has changed on your server, even when the page itself is already appearing in search.

A practical waiting sequence

  1. Deploy the new file and page reference.
  2. Immediately verify the public file, page HTML and crawl rules.
  3. Inspect and, if appropriate, submit the important page in Bing Webmaster Tools.
  4. Allow several days before judging a normal site update; allow up to the broader couple-of-weeks timeframe Bing gives for discovery of a new or substantially changed site.
  5. During that period, avoid repeatedly renaming the icon or changing several paths, because each change creates another version for Bing to discover.

These time ranges are useful for setting expectations, not for calculating an exact arrival date. The estimate in the Q&A answer concerns favicon refreshes generally, while Bing’s couple-of-weeks guidance concerns discovery of a new or substantially revamped site. Neither sets a fixed deadline for an individual favicon. If the site is established and the public icon URL is correct, keep the setup stable while Bing has time to revisit it.

Why Bing may still show the old icon

The old file is still being served

Check the exact public URL from a fresh browser session or another network and compare the image itself with the new artwork. If the response still contains the old image, the deployment, hosting cache or content delivery layer has not finished updating. Fix that before asking Bing to recrawl.

The page still points to the previous path

Search the deployed page template for the old filename and inspect the rendered head of the homepage. A new file does not help if the page continues to reference a different path. Update the shared template, publish it, and verify more than one representative page when the site has multiple layouts.

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Crawling is blocked

Review robots.txt and any access-control or bot-filtering rules for both the page and icon. Bing’s crawler must be able to reach the resources. A page that works for a logged-in administrator may still be inaccessible to Bingbot.

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If the live file is correct and crawl access is open, the remaining explanation may simply be processing time. Use URL inspection and an appropriate submission method, then wait through the days-or-weeks window described above rather than assuming that the icon has been rejected.

Only one result or page is stale

Search results can refresh at different times. Check whether the old icon appears for one URL while another page already shows the new one. Inspect and submit the stale URL itself, and verify that its HTML references the same current asset as the rest of the site.

The browser display is misleading

A browser can retain a favicon in its own cache even after the server has changed. Compare the served file and the Bing result separately: first establish what the public URL returns, then assess what Bing displays. Do not use a local browser tab as the only evidence that the search engine still has the old file.

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When the symptom is limited to Bing results, troubleshoot in order rather than changing several things at once: confirm the file served at the public URL, verify the page reference, check whether the page and asset are crawlable, then use inspection or submission and wait. That sequence helps identify whether the issue is on your site or simply a pending recrawl. Avoid assuming a specific cause based only on the fact that one result still shows an older icon.

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What not to assume about Bing favicon requirements

Do not transfer another search engine’s favicon rules to Bing. Google’s favicon documentation is a separate set of instructions for Google Search; it does not establish Bing requirements. The Bing material available here does not publish a mandatory ICO-versus-PNG choice, a required dimension beyond the Independent Advisor’s 16×16 recommendation, or a special rel value that must be used.

Likewise, do not promise a particular display date, an immediate refresh after submission, or guaranteed visibility of the icon on every Bing result. Search presentation can vary by URL, device, market and result type, and the supplied Bing guidance does not set a favicon display guarantee.

That distinction matters when choosing an implementation. You can use the conventional link element and a root-level image as a practical, easy-to-check setup, but describe those choices accurately: they are recommendations from the Microsoft Q&A Independent Advisor, not technical rules published in Bing’s general Webmaster Guidelines. If Bing publishes favicon-specific documentation later, follow that documentation for any newly stated requirements.

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A complete update checklist

  • Create the replacement artwork in a conventional web image format. If you follow the Independent Advisor’s baseline, use ICO, PNG, GIF or JPG and at least 16×16 pixels.
  • Publish it on the live site, preferably at the root path when following that advisor’s recommendation.
  • Update the common HTML head reference and remove stale references from alternate templates.
  • Open the public icon URL and confirm that it serves the new artwork.
  • Check robots.txt and other access controls for the icon and the page that references it.
  • Verify that the page renders reliably for crawlers and that the URL you plan to inspect is the public version used in search.
  • Use Bing Webmaster Tools URL inspection to investigate the page.
  • Submit the changed URL manually when useful, or send an IndexNow notification from a supported publishing workflow.
  • Allow days or weeks for recrawling; Bing’s support guidance gives a couple of weeks as a broad discovery timeframe for a newly published or substantially revamped site.
  • If the icon remains stale after these checks and a reasonable wait, use Bing Webmaster Support with the affected URL and the troubleshooting details.

When to contact Bing Webmaster Support

Escalate only after you have established that the new image is live, the page references it, robots.txt and access controls do not block crawling, and you have used the available inspection or submission tools. Include the public page URL, favicon URL, the date you deployed the change, and what the inspection tool reports. The Independent Advisor specifically suggests contacting Bing Webmaster Support when those preceding checks do not resolve a stale favicon; support can investigate account or crawl conditions that are not visible from your site files.

Frequently Asked Questions

What favicon file format and size should I use for Bing?

Bing’s general Webmaster Guidelines and support material do not publish a favicon-specific format or size requirement. A Microsoft Q&A Independent Advisor recommended ICO, PNG, GIF or JPG and at least 16×16 pixels in an answer published August 29, 2025. Treat that as practical community advice, not an official Bing specification.

Where should I put my favicon?

The Independent Advisor recommends placing it in the site root, such as /favicon.ico or /favicon.png. Bing’s general guidance does not say that the root directory is mandatory. Wherever you host it, make sure the public URL works and that the pages using the icon reference the current path.

How do I ask Bing to refresh my favicon?

Use Bing Webmaster Tools to inspect the public page that references the icon and, when useful, submit the changed page URL. If your publishing workflow supports it, IndexNow can notify Bing automatically about added, updated or deleted URLs. These tools can support discovery; none guarantees indexing or an immediate favicon change.

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Why is Bing still showing my old favicon?

There is no single cause to assume without checking the site. Verify that the public icon URL serves the new image, that the page references the correct path, and that robots.txt, access controls or bot filters do not block the page or icon. Then use Bing Webmaster Tools and allow time for recrawling.

How long does Bing take to update a favicon?

The Independent Advisor’s Microsoft Q&A answer says a favicon refresh may take several days or weeks. Bing support separately says a newly published or substantially revamped site may take a couple of weeks to be discovered and shown. Neither statement is a guaranteed deadline for a favicon.

Do Google’s favicon rules also apply to Bing?

No. Google Search Central’s favicon documentation describes Google’s guidance, not Bing requirements. For Bing, use the general crawlability and URL-notification guidance and treat exact favicon format, size and placement recommendations as unofficial unless Bing publishes a dedicated specification.

The Bottom Line

Publish one stable, publicly reachable favicon URL; make sure the page references it and Bingbot can crawl both; then inspect or submit the affected page in Bing Webmaster Tools, using IndexNow if your publishing workflow supports it. The root-directory, ICO/PNG/GIF/JPG and 16×16 advice comes from a Microsoft Q&A Independent Advisor, not a formal Bing specification. Allow days or weeks, with no guaranteed refresh date.

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