SSL Certificate Checker – Check HTTPS & SSL Status Free Online
Check if a website has a valid SSL certificate, HTTPS connectivity, and HTTP-to-HTTPS redirect. Free, instant SSL checker — no sign-up.
What is SSL Certificate Checker?
An SSL certificate checker verifies that a website has a valid SSL/TLS certificate, that the site is accessible over HTTPS, and that HTTP requests are properly redirected to HTTPS. SSL certificates are required for secure data transmission, user trust, and Google's HTTPS ranking signal.
How to Use SSL Certificate Checker
- 1Enter the domain name you want to check (e.g., example.com).
- 2Click Check to verify SSL status.
- 3Review whether the site has a valid SSL certificate.
- 4Check if HTTP redirects to HTTPS correctly.
- 5See HSTS and other security header status.
Key Features
- ✓SSL certificate validity check
- ✓HTTPS connectivity test
- ✓HTTP to HTTPS redirect verification
- ✓HSTS header detection
- ✓Instant results
Benefits
- →Verify SSL is properly configured before launch
- →Check SSL expiry to avoid site security warnings
- →Confirm HTTPS redirect is working for SEO
- →Diagnose mixed content and SSL configuration issues
Why Use Irreva for SSL Certificate Checker?
Frequently Asked Questions
What does an SSL certificate do?
An SSL/TLS certificate encrypts the connection between a user's browser and the web server. It also verifies the identity of the server, ensuring users are not connecting to an impersonator. Sites with SSL show a padlock in the browser address bar and use HTTPS.
What is HTTPS and why does it matter?
HTTPS (HyperText Transfer Protocol Secure) is HTTP over an encrypted TLS connection. Google uses HTTPS as a ranking signal, browsers mark HTTP sites as 'Not Secure', and form data (passwords, credit cards) is only safe to transmit over HTTPS.
What is HSTS?
HSTS (HTTP Strict Transport Security) is a security header that tells browsers to only connect to a site over HTTPS, even if the user types http://. It prevents SSL stripping attacks and forces encrypted connections.
What does 'HTTP to HTTPS redirect' mean?
A redirect from HTTP to HTTPS means the server automatically forwards users who visit http://yourdomain.com to https://yourdomain.com. This is a security best practice and ensures all traffic is encrypted.
Why might the check fail for a valid site?
The checker uses a public CORS proxy. Some domains block proxy requests or are slow to respond. For definitive certificate information including issuer, expiry date, and trust chain, use a dedicated tool like Qualys SSL Labs.
Does HTTPS affect SEO?
Yes. Google uses HTTPS as a ranking signal since 2014. Sites without SSL are marked as 'Not Secure' in browsers, which negatively impacts user trust and click-through rates.
How often should I check my SSL certificate?
Check your SSL certificate at least monthly and always before it expires. Most certificates are valid for 90 days to 1 year — set a reminder well before expiry.
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