SSL Certificate
Checker & Tester
Check any website's SSL certificate. Verify expiry dates, encryption strength, TLS version, and security grade. Instant results, no signup required.
Frequently Asked Questions
Why SSL Matters for SEO
SSL (HTTPS) has been a confirmed Google ranking signal since 2014. Switching from HTTP to HTTPS won't catapult your pages to position one overnight, but not having it will actively hold you back. Google's crawlers treat HTTPS as a baseline quality signal — the same way they treat mobile-friendliness and page speed. Sites still running on plain HTTP are marked "Not Secure" in Chrome, which crushes click-through rates and sends bounce rates through the roof.
Beyond rankings, SSL is a prerequisite for several other performance factors. HTTP/2 — the protocol that enables faster parallel loading of page resources — is only available over HTTPS in all major browsers. Core Web Vitals scores (LCP, FID, CLS) are directly influenced by page load speed, so an SSL-enabled HTTP/2 connection is part of the foundation for a healthy technical SEO profile.
SSL certificates also protect your link equity. When inbound links point to your HTTP pages and you later add HTTPS without proper redirects, you lose the SEO value of those links. Always implement 301 redirects from HTTP to HTTPS across your entire site — and verify them with a redirect checker.
How to Fix Common SSL Errors
Expired Certificate
Renew your SSL certificate via your hosting provider or certificate authority (e.g. Let's Encrypt, Sectigo). Set a calendar reminder 30 days before expiry, or enable auto-renewal. Most modern hosts (Cloudflare, cPanel) handle this automatically.
Mixed Content Warnings
Occurs when your HTTPS page loads resources (images, scripts, CSS) over HTTP. Use your browser's developer tools (F12 → Console) to identify offending resources, then update all internal asset URLs to HTTPS. A search-replace in your CMS database usually resolves this for WordPress sites.
Certificate Does Not Match Domain
Your SSL certificate was issued for a different domain or subdomain. Ensure your certificate covers the exact domain you're using — including www vs non-www. A wildcard certificate (*.yourdomain.com) covers all subdomains if needed.
Missing Intermediate Certificates
Browsers require a full chain of trust from your certificate back to a trusted root CA. If intermediate certificates are missing, install them on your web server (Apache, Nginx, IIS). Your CA should provide a bundle file containing the full chain.
Outdated TLS Version (TLS 1.0 / 1.1)
TLS 1.0 and 1.1 are deprecated and unsupported by modern browsers. Update your server configuration to enable TLS 1.2 and TLS 1.3 only. In Nginx, set ssl_protocols TLSv1.2 TLSv1.3; — in Apache, use SSLProtocol -all +TLSv1.2 +TLSv1.3.
Understanding SSL Certificates
🔒 Why SSL Matters
- Encrypts data between browser and server
- Google ranking signal since 2014
- Chrome marks HTTP sites as "Not Secure"
- Required for payment processing (PCI DSS)
- Builds trust with your visitors
⚠️ Common SSL Problems
- Expired certificate — renew before it lapses
- Mixed content — HTTP resources on HTTPS page
- Wrong domain — certificate doesn't match URL
- Missing intermediate certificates
- Using outdated TLS 1.0 or 1.1 protocols
Use our SSL checker alongside the Website Speed Test for a complete security and performance audit. If your certificate has issues, our web development team can help configure SSL and HTTPS properly.
Need Help Securing Your Website?
Our web development team can configure SSL certificates, set up HTTPS redirects, fix mixed content issues, and ensure your site meets all security best practices.