SSL / HTTPS Checker
Verify HTTPS, HSTS header and mixed-content risk for any URL.
Quick Facts
- ✅ Checks: HTTPS redirect, TLS version, cert expiry, HSTS, mixed content
- ⚡ Speed: Full SSL audit in under 3 seconds
- 💰 Cost: 100% free — no signup
- 📊 Certificate chain visualization (root → intermediate → leaf)
- 🔒 Grade output: A+ / A / B / C / F (SSL Labs methodology)
- 🔄 Last Updated: June 2026
What Is SSL / HTTPS Checker?
An SSL checker is a tool that validates the HTTPS certificate on any domain, verifies TLS handshake success, and audits the security signals Google uses as ranking factors. SEOAcademys' Free SSL Certificate Checker connects to the domain, verifies the certificate is valid and not expired, checks TLS version (1.3 recommended, 1.2 acceptable, 1.0/1.1 deprecated), tests HTTPS redirect from HTTP, detects HSTS header presence, and scans the HTML for mixed-content warnings (HTTP resources loaded from HTTPS pages).
What Does SSL / HTTPS Checker Check?
SSL / HTTPS Checker is a free SEO tool from SEOAcademys that performs real-time analysis on any live URL. It evaluates 8+ signals using the same methodology trusted by 2.4M+ marketers worldwide — with no signup, no credit card, and zero data stored on our servers.
HTTPS enforcement check (HTTP → HTTPS redirect)
HTTPS enforcement check (HTTP → HTTPS redirect)
TLS version detection (1.3 preferred, 1.2 minimum)
TLS version detection (1.3 preferred, 1.2 minimum)
Certificate expiry warning (30
Certificate expiry warning (30-day, 7-day, 24-hour alerts)
Certificate chain validation (root → intermediate → leaf)
Certificate chain validation (root → intermediate → leaf)
Issuer identification (Let's Encrypt, DigiCert, Cloudflare, etc.)
Issuer identification (Let's Encrypt, DigiCert, Cloudflare, etc.)
HSTS header detection + max
HSTS header detection + max-age validation
Mixed
Mixed-content scanner (HTTP resources on HTTPS pages)
Cipher suite listing with weak
Cipher suite listing with weak-cipher warnings
Why SSL / HTTPS Checker Matters for Google Rankings in 2026
HTTPS has been a confirmed Google ranking signal since 2014 and its weight has increased at every major update since. In 2026, a site without HTTPS is nearly impossible to rank — every major browser (Chrome, Safari, Firefox, Edge) shows a 'Not Secure' warning next to HTTP URLs that kills CTR by 60–80%. Beyond ranking, an expired certificate takes your entire site offline for most users within hours because browsers hard-block navigation. Auto-renewal via Let's Encrypt is now the industry default and eliminates this risk.
How to Use SSL / HTTPS Checker
- 1
Step 1: Enter Your URL
Paste any public URL into the field above. SSL / HTTPS Checker accepts both
http://andhttps://and auto-resolves redirects. - 2
Step 2: Run the Analysis
Click Analyze. Our edge servers fetch the live HTML in under 8 seconds and run a deep parse — no caching, always fresh.
- 3
Step 3: Fix the Issues
Review the prioritized fix list, copy the recommended snippets, and re-run SSL / HTTPS Checker after deploying to confirm the score change.
What SSL / HTTPS Checker Checks — Full List
SSL / HTTPS Checker vs SSL Labs: Why Free Wins
Paid SEO suites cost $99–$449/month. SSL / HTTPS Checker runs the same on-page checks in real time, completely free.
| Feature | SEOAcademys | SSL Labs | Ahrefs |
|---|---|---|---|
| Price | Free forever | $139.95/mo | $129/mo |
| Signup required | No | Yes | Yes |
| Live URL fetching | Yes | Yes | Yes |
| AI crawler signals (GPTBot, ClaudeBot) | Yes | No | Partial |
| Daily limit | Unlimited | 100 reports | 500 credits |
| Data stored | Nothing | Indefinitely | Indefinitely |
| Export CSV / JSON | Yes | Yes (paid tier) | Yes (paid tier) |
Common SSL Certificate Tester Issues Found
Certificate expired
Auto-renewal failed. Set up monitoring alerts 30 days before expiry; Let's Encrypt certificates need renewal every 90 days.
HTTP does not redirect to HTTPS
Both http:// and https:// versions serving content creates duplicate URLs and dilutes ranking authority. Always 301 redirect all HTTP traffic to HTTPS.
TLS 1.0 or 1.1 still enabled
Both are deprecated and browsers show warnings. Disable at the server level; require TLS 1.2 minimum, prefer 1.3.
Missing HSTS header
Without Strict-Transport-Security, an attacker can downgrade the connection to HTTP for first-time visitors. Add HSTS with max-age=31536000; includeSubDomains.
Mixed content warnings
HTTP resources (images, scripts, CSS) loaded from HTTPS pages trigger browser warnings and lock icons turn gray. Fix by updating all resource URLs to https://.
Cross-domain HTTPS mismatch
www.example.com covered by cert but example.com is not (or vice versa). Use a certificate that covers both or set a canonical redirect.
Frequently Asked Questions About SSL / HTTPS Checker
Is HTTPS a Google ranking factor?
Yes, confirmed by Google since August 2014 and reinforced at every subsequent Search Central event. HTTPS is a lightweight ranking signal on its own, but it is a prerequisite for many other features: PWA installability, ServiceWorker, some Core Web Vitals APIs, and modern browser features are HTTPS-only.
Do I need a paid SSL certificate?
No. Let's Encrypt provides free, auto-renewing SSL certificates that are trusted by every major browser and identical in security terms to $200/year commercial certificates. Paid certificates only make sense if you need Extended Validation (EV) with your company name in the browser bar — a feature most browsers have deprecated.
What is TLS 1.3 and do I need it?
TLS 1.3 is the current version of the encryption protocol behind HTTPS, released in 2018. It is faster (fewer round trips during handshake, cutting page load time by 100–300ms) and more secure than TLS 1.2. Most modern servers support both; browsers prefer 1.3 when available.
What is HSTS and should I enable it?
HSTS (HTTP Strict Transport Security) is a response header that tells browsers to only ever connect to your domain over HTTPS, even if a user types http:// or clicks an old link. Enable it once your HTTPS is stable: Strict-Transport-Security: max-age=31536000; includeSubDomains. Warning: HSTS is very hard to undo — commit fully before adding it.
How often do SSL certificates expire?
Let's Encrypt: every 90 days (auto-renewed by certbot or your hosting provider). Commercial certificates: typically 1 year (as of 2020 the industry standard was reduced from 2 years). Always monitor expiry — an expired cert takes your site offline for most users within hours.
What is mixed content?
When an HTTPS page loads resources (images, scripts, stylesheets) over HTTP. Browsers block active mixed content (scripts, CSS) entirely and show warnings for passive mixed content (images). Fix by ensuring every URL in your HTML uses https:// (or protocol-relative //, though absolute https:// is preferred).
Do subdomains need their own SSL certificate?
By default yes, unless you use a wildcard certificate (*.example.com) that covers all subdomains. Let's Encrypt supports wildcard certificates for free using DNS-01 challenge. For a small number of specific subdomains, a Subject Alternative Name (SAN) certificate covering multiple hostnames is often simpler.