SSL Certificates: Why HTTPS Is an SEO Ranking Factor (And How to Set It Up on WordPress)

If your website is still running on HTTP, Google already has an opinion about it, and it's not a good one. SSL certificates became a confirmed Google ranking factor back in 2014, and since then, the signal has only gotten stronger. Sites without HTTPS are flagged with a "Not Secure" warning in Chrome, which erodes visitor trust before they've read a single word. That's not just a security problem. It's an SEO problem, a conversion problem, and a credibility problem all at once.

The good news: getting an SSL certificate installed on a WordPress site is faster and cheaper than most people think, and in many cases, it's completely free. Whether you're running a small business site, an e-commerce store, or a content-heavy blog, this is one of the highest-ROI technical fixes you can make. It takes a few hours, costs nothing if you do it right, and the upside is a more secure, better-ranking, more trustworthy website.

This guide covers everything: what SSL actually does, why it matters for search rankings, how to set it up on WordPress, and what to check after you flip the switch. We've also built out The Sproutbox SSL Launch Checklist, a step-by-step framework to make sure nothing gets missed when you migrate from HTTP to HTTPS.

What Is an SSL Certificate and How Does It Work?

SSL, TLS, and HTTPS, What's the Difference?

SSL (Secure Sockets Layer) is the original protocol developed to encrypt data between a web server and a browser. Technically, the modern standard is called TLS (Transport Layer Security), an updated, more secure version, but the term "SSL certificate" stuck and is still used interchangeably. When you install an SSL/TLS certificate on your site, the connection between your server and your visitors becomes encrypted, and your URL changes from HTTP to HTTPS (HyperText Transfer Protocol Secure).

That small "S" in HTTPS signals to browsers, users, and search engines that traffic to and from your site is protected. It's what triggers the padlock icon in the browser address bar, a visual cue that visitors have come to associate with legitimate, trustworthy websites.

What Does TLS Encryption Actually Protect?

TLS encryption protects data in transit. Without it, information sent between a visitor's browser and your server, passwords, form submissions, credit card numbers, email addresses, can be intercepted by third parties. This is called a man-in-the-middle attack, and it's a real risk on unencrypted HTTP connections, especially on public Wi-Fi.

Even if your site doesn't collect sensitive data, running without HTTPS puts your visitors at risk and signals to Google that your site hasn't kept up with basic web standards. Neither is a good look.

What Is a Certificate Authority?

An SSL certificate isn't just a file you generate yourself, it has to be issued and verified by a trusted certificate authority (CA). A CA is an organization that validates your domain ownership and vouches for your site's identity. Well-known CAs include DigiCert, Comodo, and the free, open-source option Let's Encrypt. Without a certificate from a recognized CA, browsers will display security warnings even if encryption is technically in place.

Why SSL Certificates Are a Direct SEO Ranking Factor

Google's Official Stance on HTTPS

Google gives a ranking boost to websites using SSL certificates. This isn't speculation, Google announced HTTPS as a ranking signal in 2014 and has consistently reinforced the point since. In Google's own words, HTTPS is a "lightweight" signal that can serve as a tiebreaker between two otherwise equal pages. Over time, as HTTPS adoption has grown, the gap between HTTP and HTTPS sites in the SERPs has widened. If you're competing for visibility, running HTTP is a self-imposed handicap.

Website Security SEO Goes Beyond Rankings

The website security SEO connection isn't just about the ranking signal itself. Google's broader goal is to surface high-quality, trustworthy content, and an HTTP site sends a signal that the owner either doesn't know or doesn't care about basic web hygiene. Chrome's "Not Secure" label, which appears prominently in the address bar for all HTTP pages, increases bounce rates. Higher bounce rates are a behavioral signal that can suppress your rankings further. It's a compounding problem.

HTTPS and Core Web Vitals

HTTPS is also a prerequisite for HTTP/2, the modern version of the HTTP protocol that enables significantly faster page loading. Since Google's Core Web Vitals update made page speed a direct ranking factor, sites still on HTTP are missing out on the performance gains that HTTP/2 delivers. A secure website ranking better isn't magic, it's the result of ticking the right technical boxes, and HTTPS is one of the most fundamental.

How to Get a Free SSL Certificate for Your WordPress Site

Let's Encrypt: The Free, Open-Source SSL Option

Let's Encrypt is an open-source certificate authority that issues free SSL certificates, and it's become the standard for WordPress sites that want HTTPS without paying for it. Let's Encrypt certificates are 90-day certificates that auto-renew, and they're trusted by all major browsers. Most quality WordPress hosts now offer Let's Encrypt integration directly from their hosting dashboard, meaning you can activate a free SSL certificate in a few clicks without touching the command line.

WP Engine and Managed SSL

WP Engine, one of the leading managed WordPress hosting platforms, includes free SSL certificates for all sites on their platform. When you host with WP Engine, SSL is provisioned automatically, no manual setup required. This is one of the benefits of managed WordPress hosting: the technical infrastructure that makes your site secure, fast, and search-engine-ready is handled for you.

Sproutbox WordPress Hosting Includes Free SSL

Our WordPress Website Hosting includes a free SSL certificate as part of every plan. SSL is provisioned, monitored, and auto-renewed, you never have to think about it. If you're migrating an existing site to our hosting, we handle free migrations, including ensuring your HTTPS redirect is in place and your certificate is active from day one. No contracts, no configuration headaches, no expired certificate surprises.

The Sproutbox SSL Launch Checklist

Installing an SSL certificate is only step one. A proper HTTP to HTTPS migration involves several follow-up steps that are easy to miss, and missing them can create SEO problems that offset the gains you were trying to make. We use this checklist with every site we migrate.

Step 1: Install Your SSL Certificate

Provision your SSL certificate through your hosting provider, via Let's Encrypt, your host's built-in SSL tool, or a paid certificate authority. Confirm the certificate is valid and trusted by visiting your HTTPS URL and checking for the padlock icon in the browser address bar.

Step 2: Force the HTTPS Redirect

An SSL certificate alone doesn't redirect HTTP visitors to HTTPS, you have to configure that separately. Set up a 301 redirect from HTTP to HTTPS in your `.htaccess` file, your WordPress settings, or your hosting dashboard. This ensures all traffic lands on the secure version of your site, and that Google consolidates ranking signals to the HTTPS URL.

Step 3: Fix Mixed Content Errors

Mixed content errors occur when an HTTPS page loads resources, images, scripts, stylesheets, from HTTP URLs. Browsers block some of these, and Google flags them as security issues. Use a plugin like Better Search Replace or Really Simple SSL to update hardcoded HTTP URLs in your database, or audit your source code manually for any remaining HTTP asset references.

Step 4: Update Internal Links and Canonical Tags

Scan your site for internal links still pointing to HTTP URLs and update them to HTTPS. Update your canonical tags, Open Graph tags, and any hardcoded references in your theme or page builder. This keeps your internal link equity clean and prevents duplicate content issues between HTTP and HTTPS versions of the same page.

Step 5: Resubmit Your Sitemap and Verify in Search Console

Add your HTTPS site as a new property in Google Search Console (it treats HTTP and HTTPS as separate properties), submit your updated XML sitemap, and request indexing for your key pages. This tells Google to crawl the new HTTPS version and start building ranking signals there. Monitor Search Console for any crawl errors or security warnings in the weeks after migration.

What Happens After You Install SSL: Monitoring and Maintenance

Certificate Renewal

Let's Encrypt certificates expire every 90 days. Most hosting platforms handle auto-renewal, but it's worth confirming yours does. An expired SSL certificate is worse than no certificate, browsers display a full-screen security warning that stops visitors in their tracks. If you're on Sproutbox WordPress Hosting, renewal is automatic and monitored on our end.

Tracking Your Secure Website Ranking Progress

After your WordPress SSL setup is complete and Google has re-crawled your site, you should start to see the HTTP pages drop out of Search Console's index and be replaced by their HTTPS counterparts. Track your rankings in the weeks following migration, a small initial dip is normal as Google reprocesses your URLs. Most sites recover within a few weeks, and many see modest ranking improvements as the HTTPS signal and any performance gains from HTTP/2 take effect.

SSL Is One Piece of a Larger SEO Foundation

HTTPS is table stakes for technical SEO, but it's just one layer. Site speed, crawlability, internal linking, content quality, and backlink authority all compound on top of a secure foundation. If you want to go deeper on the technical side, our SEO services include a full audit of your site's technical health, not just SSL status. And if your site itself needs work beyond the certificate, our web design and development team builds sites that are fast, secure, and built to rank from day one.

Frequently Asked Questions

Does SSL help with SEO?

Yes, Google confirmed HTTPS as a ranking signal in 2014, and it remains a direct ranking factor today. While it's considered a lightweight signal relative to content quality and backlinks, it acts as a tiebreaker between competing pages and is a prerequisite for other performance features like HTTP/2. Beyond rankings, HTTPS reduces bounce rates by eliminating Chrome's "Not Secure" warning, which has an indirect positive effect on SEO.

Is SSL free on WordPress?

In most cases, yes. Let's Encrypt provides free SSL certificates that are trusted by all major browsers and work with virtually every WordPress hosting environment. Many managed WordPress hosts, including WP Engine and Sproutbox, include free SSL as part of their hosting plans and handle provisioning and renewal automatically. You generally only need to pay for an SSL certificate if you require an extended validation (EV) certificate, which displays your organization name in the browser bar.

What happens if my website doesn't have HTTPS?

A few things, none of them good. Chrome and other major browsers display a "Not Secure" warning in the address bar, which erodes visitor trust and increases bounce rates. Google applies a ranking disadvantage to HTTP URLs. Your site misses out on HTTP/2 performance improvements. And any data transmitted between your visitors and your server, form submissions, logins, payment information, is unencrypted and potentially vulnerable to interception. It's one of the easiest technical fixes available, and there's no good reason to delay it.

How do I fix mixed content errors after installing SSL?

Mixed content errors happen when an HTTPS page loads assets (images, scripts, stylesheets) from HTTP URLs. To fix them: first, use a plugin like Really Simple SSL or Better Search Replace to update HTTP references stored in your WordPress database. Then check your theme files and page builder for hardcoded HTTP URLs. Finally, use your browser's developer tools or a tool like WhyNoPadlock to scan for any remaining mixed content. Once fixed, your padlock icon will appear clean and browsers won't block any resources.

How long does it take Google to recognize my HTTPS migration?

Google typically begins re-crawling and re-indexing HTTPS URLs within a few days to a few weeks, depending on your site's crawl frequency and the size of your site. Submitting your updated HTTPS sitemap in Google Search Console and requesting indexing on your key pages speeds up the process. Expect a brief transitional period where you may see rankings fluctuate slightly, this is normal and usually resolves within 2–4 weeks as Google consolidates signals to your HTTPS URLs.

Conclusion

An SSL certificate is one of the most straightforward technical wins available to any website owner, it's free, it's relatively fast to implement, and the downside of skipping it (ranking penalties, browser warnings, visitor distrust) far outweighs the effort of setting it up. The Sproutbox SSL Launch Checklist gives you a clear sequence: install the certificate, force the HTTPS redirect, fix mixed content errors, update internal links, and verify in Search Console. Follow those steps in order and your migration will be clean.

If you'd rather not deal with any of this yourself, that's exactly what our WordPress Website Hosting is built for, fully managed, free SSL included, no contracts. Or if you want a full technical SEO audit alongside your HTTPS migration, our SEO team can assess everything that's holding your site back and build a roadmap to fix it. Either way, let's talk, we're happy to start with a quick look at where your site stands.