How SSL Affects SEO and Google Search Rankings

Google Declared HTTPS a Ranking Signal in 2014

In August 2014, Google officially announced on the Google Search Central Blog that HTTPS would be used as a ranking signal in its search algorithm. Initially the impact was minor, but Google stated it would gradually increase the weight of this signal over time — and that is exactly what has happened.

Today, over 95% of websites appearing on Google's first page use HTTPS. That proportion makes it clear that HTTPS has become the minimum standard, not just a small advantage. Sites still running on HTTP are at a significant competitive disadvantage across multiple fronts.

When Did HTTPS Become a Ranking Signal, and How Much Weight Does It Carry?

A common question from site owners is "Is HTTPS really a ranking factor, and how heavily does it count?" The answer is yes — it has been an official factor since August 2014, when Google announced it on the Google Search Central Blog. At that time, however, Google explicitly described it as a "lightweight" signal: it affected fewer than 1% of all search queries and carried far less weight than factors like content quality, query relevance, or inbound links.

The key thing to understand is that over the years, Google has gradually shifted HTTPS from being a slight bonus to being a baseline requirement. In other words, back in 2014 an HTTPS site might gain a small edge — but by 2026, a site still on HTTP is considered "below the minimum standard" and loses ground both directly and indirectly. This is especially true now that Google uses HTTPS as a tie-breaker: when two pages are of comparable quality, the HTTPS version is shown first.

Chrome's "Not Secure" Warning Drives Users Away

Beyond direct ranking signals, Google Chrome shows a "Not Secure" warning in the address bar for every HTTP website. This impacts SEO indirectly through behavioral metrics that Google tracks:

• Higher bounce rate — users see the warning and immediately hit the back button without engaging
• Lower dwell time — reduced time-on-page sends negative signals to Google
• Conversion rate drops — visitors who do not trust the site will not buy, sign up, or submit forms
• Damaged trust signals — users now instinctively look for the padlock before entering any information

Core Web Vitals and HTTPS

Google Core Web Vitals are the set of metrics measuring real-world user experience, used as ranking factors. While Core Web Vitals themselves do not directly require HTTPS, there is an important connection.

HTTP/2 — the modern protocol significantly faster than HTTP/1.1 — supports features like multiplexing (loading multiple files simultaneously), header compression, and server push. However, modern browsers only enable HTTP/2 over HTTPS connections. This means HTTPS sites automatically benefit from HTTP/2's speed advantages, improving metrics like LCP (Largest Contentful Paint) that form part of Core Web Vitals.

HTTPS Preserves Referrer Data in Analytics

This is critically important for marketing teams and is often overlooked. When a user clicks a link from an HTTPS website to an HTTP website, the browser does not send the Referrer header — a security policy known as "referrer downgrade." In Google Analytics, all traffic arriving from HTTPS sites appears as "Direct" instead of the correct "Referral" source.

The result is distorted analytics data. You see inflated Direct traffic numbers and lose visibility into your actual traffic sources. Once your site runs on HTTPS, this problem disappears because the Referrer header is correctly passed between HTTPS connections.

Indirect Effects: Trust, Bounce Rate, Referral Data, and Core Web Vitals

Beyond being a direct ranking signal, the biggest SEO impact of HTTPS usually comes from "indirect effects" that compound together. Today's Google increasingly weights user-experience signals, and HTTPS is the foundation underneath several of those signals at once. Here is how the indirect effects connect:

A point that is easy to overlook: every modern browser enables HTTP/2 and HTTP/3 (QUIC) only over HTTPS connections. So if your site is still on HTTP, you are automatically locked into the older, slower HTTP/1.1 with no alternative. Installing SSL is therefore the first door that unlocks protocol-level speed, which directly improves LCP (Largest Contentful Paint) and INP (Interaction to Next Paint) — both part of Core Web Vitals.

How to Check If Your Site Is Already on HTTPS

1. Open your website in Chrome or Firefox
2. Look at the address bar URL — if it starts with https:// and shows a padlock, your site is secure
3. If you see "Not Secure" or a warning icon, your site is still on HTTP or has a mixed content issue
4. Use SSL Labs (ssllabs.com/ssltest) for a comprehensive SSL configuration audit and grade

Mixed Content: HTTPS But Still Showing Warnings

Sometimes even after installing SSL, the padlock does not appear. This usually means some resources on the page are still loading over HTTP — a problem called Mixed Content that needs to be fixed separately. See the Mixed Content article for detailed fix instructions.

What to Do After Installing SSL So You Don't Lose SEO

This is the step site owners get wrong most often. Many assume that installing SSL is the end of the job — but if you skip the follow-up, the rankings you built on your HTTP URLs can evaporate, because Google treats http:// and https:// as two completely different URLs. Run through this checklist every time you install SSL:

1. Set up a site-wide 301 redirect from HTTP to HTTPS — use Force HTTPS in .htaccess for a permanent (301), not temporary (302), redirect. A 301 passes link equity from the old URL to the new one.
2. Update the canonical tag on every page to point to https:// — if <link rel="canonical"> still points to http://, Google gets confused about which version to index.
3. Fix all mixed content — switch every image, CSS, JS, and iframe link on the page to https:// or use relative URLs.
4. Submit a fresh HTTPS sitemap — update every URL in sitemap.xml to https:// and resubmit it through Google Search Console.
5. Add the new property in Search Console — Google Search Console treats https:// as a separate property, so you must add and verify it, then set your preferred domain.
6. Update internal links and your Analytics URL — change the default URL in Analytics to https:// and make sure every internal link on the site uses https://.

The Myth: Will Rankings Jump Immediately After Installing SSL?

The straightforward answer is no. Installing SSL is not a magic button that rockets you up the rankings overnight, because HTTPS is a lightweight factor compared to content quality and backlinks. In reality, after migrating to HTTPS some sites see rankings "wobble" or dip temporarily for 2–4 weeks while Google gradually re-indexes the new URLs and passes link equity through the 301 redirects. That is normal — not a sign you did something wrong.

The right mindset is to view HTTPS as "protection against losing rankings" rather than a way to "gain rankings." A site without SSL is bleeding points from the direct ranking signal, the Chrome warning, and slower speed all at once. Installing SSL stops that bleeding and lets other factors — quality content and backlinks — work at full strength. If you complete the checklist above, rankings will settle and tend to improve within 1–2 months.

Upgrade Your Site to HTTPS Today

If your site is still on HTTP, the upgrade process is straightforward. AsiaGB Hosting customers can enable free Let's Encrypt through DirectAdmin in just a few clicks — no extra cost, auto-renews. For business sites needing paid SSL from RapidSSL, GeoTrust, or DigiCert, prices start from 1,000 THB/year.

After installing SSL, configure Force HTTPS in .htaccess to automatically redirect all HTTP requests to HTTPS, and check for any mixed content. This ensures your site gets the full security and SEO benefits.

Frequently Asked Questions About SSL and SEO

Does SSL really improve Google rankings?

Yes, but it is a lightweight factor compared to content quality and backlinks. Installing SSL alone will not send your rankings soaring — but not having SSL costs you points from the direct ranking signal, the Chrome warning, and slower speed. Think of it as the minimum standard every site must meet rather than a growth lever.

How many days until rankings rise after installing SSL?

Typically you may see rankings wobble or dip temporarily for 2–4 weeks while Google re-indexes the new URLs and passes link equity through the 301 redirects. If you set up the 301s, canonicals, and a fresh sitemap correctly, rankings will stabilize and tend to improve within 1–2 months.

Does free Let's Encrypt affect SEO differently than a paid SSL?

No difference for SEO, because Google only checks whether the site is HTTPS — it does not care which provider issued the certificate. AsiaGB Hosting customers who enable free Let's Encrypt through DirectAdmin get the same SEO benefit as a paid SSL. Paid OV/EV certificates are better suited to business sites that want to display verified organization identity.

Why does my site still show "Not Secure" after installing SSL?

This is usually caused by mixed content — some resources such as images, CSS, or JS are still loading over http:// on the page. You need to switch all of those links to https:// or relative URLs before the browser will display the full padlock.