What does Google say about SEO? /

Official statement

An incorrect redirect from HTTPS to HTTP (instead of HTTP to HTTPS) can prevent indexing problem resolution and slow down the implementation of fixes.
19:58
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Extracted from a Google Search Central video

⏱ 1h13 💬 EN 📅 22/04/2021 ✂ 29 statements
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📅
Official statement from (5 years ago)
TL;DR

Google confirms that a misconfigured redirect from HTTPS to HTTP blocks indexing problem resolution and slows down the implementation of fixes. Specifically, if your site redirects from the secure protocol to the non-secure one, Googlebot may enter a processing loop that delays the indexing of your changes. This setup reverses the expected logic and disrupts the search engine's trust chain, rendering your technical correction efforts invisible.

What you need to understand

What exactly is a redirect from HTTPS to HTTP?<\/h3>

The standard setup<\/strong> for a secure site involves redirecting all HTTP (non-secure) requests to their HTTPS equivalent. This makes logical sense: you force the visitor and search engines to use the encrypted version of your pages.<\/p>

A redirect from HTTPS to HTTP<\/strong> does the exact opposite: it forces the secure version to redirect to the non-secure version. This absurd configuration can occur during a failed migration, an unresolved SSL certificate issue, or a misconfigured rewriting rule in the .htaccess or server configuration.<\/p>

Why does this error block problem resolution for indexing?<\/h3>

When Google encounters this configuration, it faces a contradictory signal<\/strong>. The engine has indexed your site in HTTPS (the secure version has been preferred by default for years), but your redirects tell it that the canonical version is in HTTP.<\/p>

Specifically, if you fix an indexing problem — metadata, hreflang tags, duplicate content — those corrections remain invisible<\/strong> because Googlebot gets lost between the two versions. Processing time skyrockets, crawl prioritization is skewed, and your changes do not rise in the index.<\/p>

In what scenarios does this error most commonly occur?<\/h3>

Classic scenarios include incomplete HTTPS migrations<\/strong> where a developer has removed the SSL certificate afterward, thinking it would solve a performance or compatibility issue. Another frequent case: a misconfigured CDN forcing HTTP on certain critical resources.<\/p>

This error is also observed during hosting changes<\/strong> where Apache or Nginx rules are copied without revision, overriding existing redirects. Sometimes, it’s simply a WordPress plugin or a PrestaShop module injecting conflicting rules after an update.<\/p>

  • Redirecting from HTTPS to HTTP reverses the expected security logic by Google<\/strong><\/li>
  • This configuration blocks the implementation of technical fixes<\/strong>, extending indexing delays<\/li>
  • Crawl budget is wasted<\/strong> on back-and-forth between protocols instead of discovering content<\/li>
  • Incomplete SSL migrations<\/strong> and misconfigured CDNs are the most common sources of error<\/li>
  • The Search Console may not explicitly signal this issue<\/strong>, making diagnosis difficult without thorough auditing<\/li><\/ul>

SEO Expert opinion

Does this statement align with field observations?<\/h3>

Absolutely. It’s regularly observed that sites reverting from HTTPS to HTTP (whether intentionally or not) experience their processing time for changes<\/strong> balloon, sometimes taking weeks. Google doesn’t openly communicate this point in standard documentation, but it aligns with how its index operates.<\/p>

The engine maintains a canonical version<\/strong> of each URL. When redirect signals conflict with this canonical version, the system must arbitrate — and this arbitration consumes processing time. The corrections you make remain pending until Google resolves this inconsistency.<\/p>

What are the blind spots of this assertion?<\/h3>

Google does not specify exactly how much time<\/strong> the slowdown entails. Are we talking days? Weeks? The answer likely varies based on site size, crawl budget, and how frequently Googlebot visits. [To be verified]<\/strong> on sites with fewer than 500 pages versus e-commerce catalogs with 50,000 references.<\/p>

Another gray area: the distinction between complete and partial redirects<\/strong>. If only a few pages redirect from HTTPS to HTTP (for example, media resources), is the impact the same as a global domain-level redirect? Google remains vague on this critical threshold.<\/p>

In what cases does this rule not apply directly?<\/h3>

If your site has never been indexed in HTTPS<\/strong>, reversing does not pose the same problem — but you then incur other penalties related to the absence of encryption. Subdomains can also behave differently: blog.example.com in HTTP while www.example.com remains in HTTPS does not necessarily create the same confusion.<\/p>

Beware also of multi-region or multi-language sites<\/strong>: an HTTPS to HTTP redirect on one language version can contaminate the processing of other versions if hreflang tags are misconfigured. Complexity increases exponentially.<\/p>

Attention:<\/strong> Some monitoring tools do not detect this error because they only test the HTTP version or only the HTTPS version, not the direction of the redirect<\/strong>. Check manually with curl or a redirect checker.<\/div>

Practical impact and recommendations

How to detect this error on your site?<\/h3>

Manually test using curl -I https:\/\/yoursite.com<\/strong> and check the Location line in the response. If it points to http:\/\/, you have a problem. Perform this test on several key pages: homepage, main categories, product sheets.<\/p>

In the Search Console<\/strong>, analyze coverage reports and crawl logs. If Google is massively discovering your URLs in HTTP when you thought you migrated to HTTPS, it’s a warning signal. Cross-reference with Core Web Vitals reports: a site oscillating between protocols often shows erratic metrics.<\/p>

What corrective actions should be applied immediately?<\/h3>

Review your server configuration<\/strong> (Apache, Nginx, IIS) and check all rewriting rules. Remove any directive that forces HTTP after HTTPS. If you are using a CDN (Cloudflare, Fastly, etc.), check the Page Rules and SSL\/TLS settings.<\/p>

On the CMS side, temporarily disable redirect or caching plugins<\/strong> to isolate the source of the problem. Some modules inject rules that override server configuration. Once the source is identified, fix it permanently and enforce a full recrawl through the Search Console.<\/p>

How to speed up the implementation of the fixes?<\/h3>

Once the redirects are fixed, manually submit your strategic URLs through URL inspection<\/strong> in the Search Console. Do not saturate the tool, but prioritize the homepage, top categories, recent content. Update your XML sitemap by including only HTTPS URLs, and resubmit it.<\/p>

Monitor the server logs<\/strong> for 7 to 14 days to confirm that Googlebot is crawling the correct versions. If the slowdown persists beyond three weeks after correction, open a thread in the official Google Search Central forum with screenshots and technical details — sometimes a bug on Google's side requires manual intervention.<\/p>

  • Audit all redirects with curl or a dedicated tool (Screaming Frog, OnCrawl) in "follow redirects" mode<\/li>
  • Check server configuration (.htaccess, nginx.conf) and remove any HTTPS to HTTP rules<\/li>
  • Control CDN settings and disable any unnecessary forcing of HTTP<\/li>
  • Resubmit the cleaned XML sitemap (HTTPS URLs only) via Search Console<\/li>
  • Force indexing of critical pages via the URL inspection tool<\/li>
  • Monitor server logs for 2 weeks to confirm Googlebot's behavior<\/li><\/ul>
    This configuration error, although rare, can paralyze your indexing<\/strong> for weeks. Detection requires a manual technical audit, as automated tools do not always report the direction of redirects. Once fixed, recovery may take 7 to 21 days depending on your crawl budget. These technical optimizations — server configuration, redirect management, CDN coordination — can become complex to orchestrate alone, especially on hybrid infrastructures or multi-domain sites. If you lack internal resources or if the problem persists despite your fixes, support from an agency specialized in technical SEO audits can significantly accelerate resolution and secure your HTTPS migration in the long term.<\/div>

❓ Frequently Asked Questions

Combien de temps faut-il pour que Google réindexe un site après correction d'une redirection HTTPS vers HTTP ?
Entre 7 et 21 jours selon votre crawl budget et la taille du site. Les sites à forte fréquence de crawl (médias, e-commerce actifs) récupèrent plus vite. Vous pouvez accélérer le processus en resoumettant manuellement vos URLs critiques via la Search Console.
Une redirection HTTPS vers HTTP partielle (seulement quelques pages) pose-t-elle le même problème ?
Oui, mais l'impact est proportionnel au volume de pages concernées. Si seules des ressources secondaires (PDFs, images) redirigent vers HTTP, l'effet sur l'indexation globale reste limité. En revanche, si des pages stratégiques sont touchées, Google peut déprioriser tout le domaine.
La Search Console signale-t-elle explicitement cette erreur de redirection ?
Rarement de manière directe. Vous verrez plutôt des symptômes indirects : URLs découvertes en HTTP alors que vous pensiez migrer en HTTPS, ralentissement du crawl, pages corrigées qui restent en erreur. Un audit manuel via curl ou Screaming Frog reste nécessaire.
Peut-on forcer Google à crawler uniquement la version HTTPS via robots.txt ou meta tags ?
Non. Le robots.txt et les balises meta influencent le comportement de crawl, mais ne résolvent pas une redirection inverse au niveau serveur. Vous devez corriger la configuration à la source (Apache, Nginx, CDN) pour que Googlebot reçoive les bons signaux HTTP.
Un certificat SSL expiré peut-il provoquer une redirection HTTPS vers HTTP automatique ?
Certains serveurs ou CDN mal configurés redirigent vers HTTP en cas d'erreur de certificat pour éviter une page blanche. C'est une rustine dangereuse : mieux vaut renouveler immédiatement le certificat et maintenir HTTPS, même temporairement avec un certificat auto-signé, le temps de résoudre le problème.

🎥 From the same video 28

Other SEO insights extracted from this same Google Search Central video · duration 1h13 · published on 22/04/2021

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