Does Google actually prioritize HTTPS in search results, or does it depend on other factors?

Why doesn't Google automatically prioritize HTTPS?

Contrary to what many believe, migrating to HTTPS doesn't guarantee that Google will index this version. The search engine first examines whether the SSL certificate is valid, whether the page loads correctly in HTTPS, and whether it doesn't send contradictory signals.

Google crosses multiple canonicalization criteria — redirects, canonical tags, sitemaps, internal links — to determine which URL to display. If these signals point to HTTP or if HTTPS presents technical issues, the non-secure version may remain the one indexed.

What makes an HTTPS page "truly secure" for Google?

Google doesn't settle for an active SSL certificate. The search engine verifies that all page resources — images, scripts, CSS — are loaded via HTTPS. If mixed content (HTTP/HTTPS) persists, the page is not considered fully secure.

Certificate errors, redirect loops, or HTTPS versions inaccessible to crawling result in a fallback to HTTP in search results. This is a protection for the end user, not an algorithmic whim.

What are the canonicalization criteria at stake?

• 301/302 redirects: if HTTP redirects to HTTPS, it's a strong signal — but not sufficient alone
• Canonical tags: must point to the HTTPS version from all page variants
• XML sitemaps: should only list HTTPS URLs if that's the preferred version
• Internal links: massive linking in HTTP dilutes the canonicalization signal toward HTTPS
• Hreflang and alternative tags: must also reference only HTTPS
• Technical quality of HTTPS: valid certificate, no mixed content, equal or better load time

Is this statement consistent with field observations?

Completely. We regularly observe sites migrated to HTTPS that continue to have their HTTP version indexed for weeks, even months. Google doesn't switch by magic — it waits for signals to converge.

The problem is that many HTTPS migrations are poorly executed: missing redirects on certain URLs, forgotten canonical tags, sitemaps never updated. Google then legitimately hesitates about which version to favor. Allan Scott makes this point well: actual user security is what matters, not just the existence of a certificate.

What nuances should be added to this statement?

Google remains vague about the exact weight of each criterion. We know that permanent 301 redirects are a major signal, but if the rest of the site continues to internally link to HTTP, that contradicts this signal. [To verify]: Google has never communicated a precise timeline for how long an HTTPS migration takes to be fully processed.

Another critical point: not all SSL certificates are equal. A self-signed or expired certificate completely nullifies the HTTPS benefit. Google can even temporarily deindex the HTTPS version if it generates security errors in Chrome, then revert to HTTP by default.

In what cases doesn't this rule apply strictly?

On sites with few pages and few external links, Google can switch quickly to HTTPS if all signals are coherent. Conversely, on a large site with millions of pages and mixed historical backlinks (HTTP/HTTPS), canonicalization can drag on.

What should you check immediately on your HTTPS site?

First, scan your site to identify any mixed content. A single image loaded via HTTP on an HTTPS page is enough to trigger a security warning in the browser, which can negatively influence Google.

Next, verify that all HTTP → HTTPS redirects are properly in place and permanent (301). Test multiple URLs: homepage, deep pages, URLs with parameters. A missing or 302 redirect sends an ambiguous signal.

How do you ensure Google indexes the HTTPS version properly?

Inspect your URLs in Google Search Console to see which version is considered canonical. If you still see HTTP URLs indexed while HTTPS has been active for several weeks, dig deeper: contradictory canonical tags, outdated sitemaps, internal links pointing to HTTP.

Also enforce the HTTPS property in Search Console and submit an XML sitemap containing only HTTPS URLs. This is an additional signal to accelerate the switch.

What mistakes should you absolutely avoid?

• Never leave HTTP and HTTPS coexisting without redirects — Google will choose for you, often incorrectly
• Don't forget to update internal canonical tags to HTTPS
• Avoid redirect chains (HTTP → www HTTPS → HTTPS without www) that slow down crawling and dilute the signal
• Don't neglect backlinks: if possible, ask third-party sites to link directly to HTTPS
• Verify that the SSL certificate covers all domain variants (www, non-www, subdomains)
• Test HTTPS performance: if the secure version is significantly slower, it can work against you