SSL Checker
Check SSL certificate validity, expiration, and security details for any domain.
Enter domain without https:// (e.g., google.com)
What is SSL?
SSL (Secure Sockets Layer) certificates encrypt data between your browser and websites, ensuring secure communication.
Enter a domain to check
SSL certificate details will appear here
SSL Checker - Verify Website SSL Certificate Security Online
Instantly check SSL certificate validity, expiration date, and security details for any website. Our free SSL Checker tool helps you ensure your website's HTTPS connection is secure and trustworthy.
What is an SSL Certificate?
An SSL (Secure Sockets Layer) certificate is a digital certificate that authenticates a website's identity and enables an encrypted connection. When you see a padlock icon in your browser's address bar, it means the website has a valid SSL certificate and your data is being transmitted securely.
SSL certificates are now essential for:
- E-commerce websites processing payment information
- Login pages handling user credentials
- Any website collecting personal data
- SEO ranking as Google uses HTTPS as a ranking factor
- Building trust with website visitors
Why Use Our SSL Certificate Checker?
- Instant Verification: Check any domain's SSL certificate status in seconds
- Expiration Alerts: See exactly when the certificate expires and how many days remain
- Complete Details: View issuer information, validity period, and security protocols
- SAN Support: Check all Subject Alternative Names covered by the certificate
- Security Analysis: Verify encryption strength, key size, and signature algorithm
- 100% Free: No sign-ups, no limits, completely free to use
What Information Does the SSL Checker Show?
Certificate Validity
- Status: Whether the certificate is currently valid or expired
- Days Remaining: Countdown to certificate expiration
- Valid From/To: Complete validity period dates
Issuer Information
- Certificate Authority: Who issued the SSL certificate (e.g., Let's Encrypt, DigiCert, Comodo)
- Organization Name: The issuing organization's details
Security Details
- Protocol Version: TLS version supported (TLS 1.2, TLS 1.3)
- Key Size: Encryption key strength (2048-bit, 4096-bit)
- Signature Algorithm: The algorithm used to sign the certificate
Subject Information
- Common Name: The primary domain the certificate is issued for
- Subject Alternative Names (SAN): Additional domains covered by the certificate
- Certificate Fingerprint: Unique identifier for the certificate
How to Use the SSL Checker
- Enter the Domain: Type the website domain name (e.g., google.com)
- Click Check Certificate: Our tool will analyze the SSL certificate
- Review Results: View comprehensive certificate details and status
- Take Action: If issues are found, contact your hosting provider
Understanding SSL Certificate Status
✅ Valid Certificate
The SSL certificate is properly configured and not expired. Your website visitors will see a secure padlock icon.
⚠️ Expiring Soon
The certificate will expire within 30 days. Renew immediately to avoid security warnings.
❌ Expired Certificate
The certificate has expired. Visitors will see security warnings and may not be able to access your site.
❌ Invalid Certificate
The certificate has issues such as:
- Self-signed certificate
- Certificate mismatch (wrong domain)
- Untrusted certificate authority
- Incomplete certificate chain
Types of SSL Certificates
Domain Validation (DV)
- Basic level of validation
- Verifies domain ownership only
- Fastest to obtain (minutes to hours)
- Ideal for blogs and personal websites
Organization Validation (OV)
- Validates organization identity
- Shows company name in certificate details
- Takes 1-3 days to obtain
- Recommended for business websites
Extended Validation (EV)
- Highest level of trust
- Rigorous validation process
- Previously showed green address bar
- Used by banks and large corporations
SSL Certificate Best Practices
- Always Renew Early: Renew certificates at least 30 days before expiration
- Use Strong Encryption: 2048-bit RSA or 256-bit ECC keys minimum
- Enable TLS 1.3: Use the latest TLS version for best security
- Monitor Expiration: Set up alerts for certificate expiration
- Use CAA Records: Specify which CAs can issue certificates for your domain
- Implement HSTS: Force HTTPS connections with HTTP Strict Transport Security
Frequently Asked Questions
How often should I check my SSL certificate?
We recommend checking your SSL certificate at least monthly, or setting up automated monitoring to alert you before expiration.
What happens if my SSL certificate expires?
Visitors will see security warnings in their browsers, potentially blocking access to your site. Search engines may also lower your rankings.
Can I use SSL Checker for any website?
Yes, you can check the SSL certificate status of any publicly accessible website, not just your own.
Why does the check sometimes take longer?
Our tool performs a comprehensive analysis including certificate chain validation, which may take longer for some domains.
Is my data safe when using this tool?
Yes, we only query public SSL certificate information. We don't store or share any data about the domains you check.
What is a wildcard SSL certificate?
A wildcard certificate covers the main domain and all first-level subdomains (e.g., *.example.com covers mail.example.com, shop.example.com, etc.).
TinyTool's SSL Checker helps you maintain website security. Bookmark this page to regularly verify your SSL certificates!