SSL Certificate Checker
Verify SSL certificate validity, expiration date, and security details
About SSL Certificates
SSL/TLS certificates encrypt data between your server and users' browsers, ensuring secure communication and building trust.
Why SSL Matters
- Security: Encrypts sensitive data like passwords and payment info
- Trust: Shows the padlock icon in browsers
- SEO: Google ranks HTTPS sites higher
- Compliance: Required for PCI DSS and other standards
Certificate Types
- Domain Validated (DV): Basic validation, issued quickly
- Organization Validated (OV): Verifies organization identity
- Extended Validation (EV): Highest level, shows company name
Common Issues
- Expired Certificate: Renew before expiration
- Wrong Domain: Certificate doesn't match domain
- Untrusted Issuer: Certificate from unknown authority
- Mixed Content: HTTPS page loading HTTP resources
Best Practices
- Monitor certificate expiration dates
- Use automated renewal (Let's Encrypt)
- Implement HSTS headers
- Keep certificates up to date
Frequently Asked Questions
How often should I check my SSL certificate?
Check your certificate at least monthly, or set up automated monitoring. Most certificates expire after 90 days (Let's Encrypt) or 1-2 years.
What happens if my certificate expires?
Browsers will show a security warning, preventing users from accessing your site. This can severely impact trust and traffic.
Can I get a free SSL certificate?
Yes! Let's Encrypt provides free SSL certificates with automated renewal. Many hosting providers include this.
What is a wildcard certificate?
A wildcard certificate secures a domain and all its subdomains (e.g., *.example.com covers app.example.com, api.example.com, etc.).
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