Verify SSL certificate status, expiration dates, issuer information, and security configuration for any website
Want to embed this SSL checker on your website? Use this code:
A properly configured and valid SSL certificate:
Status: Valid and properly configured
Security: Strong encryption and trusted issuer
An SSL certificate that will expire in the near future:
Status: Valid but expiring soon
Action: Renew certificate immediately
An SSL certificate that has already expired:
Status: Expired - security risk
Action: Replace certificate immediately
An Extended Validation certificate with highest trust level:
Status: Valid EV certificate
Trust Level: Highest - shows company name in browser
Basic validation confirming domain ownership. Issued quickly and cost-effectively.
Validates domain ownership and organization details. Shows company name in certificate.
Rigorous validation process. Shows company name in browser address bar (green bar).
Secures a domain and all its subdomains. Cost-effective for multiple subdomains.
Learn the fundamentals of SSL/TLS encryption, how it works, and why it's essential for website security.
Read Tutorial →Discover the most common SSL configuration errors that can compromise your website security.
Read Tutorial →Learn how to properly manage SSL certificate renewals to avoid service disruptions.
Read Tutorial →Understand the differences between DV, OV, and EV certificates and when to use each type.
Read Tutorial →Step-by-step guide to properly implementing and configuring SSL on your web server.
Read Tutorial →Learn about security headers like HSTS, CSP, and how to implement them for maximum security.
Read Tutorial →Compare our free SSL checker with other popular tools and services:
| Feature | Our Tool | Tool A | Tool B | Tool C |
|---|---|---|---|---|
| Free to Use | ✅ | ✅ | ❌ (Premium) | ✅ |
| Certificate Details | ✅ | ✅ | ✅ | ❌ |
| Expiration Monitoring | ✅ | ❌ | ✅ | ❌ |
| Protocol Support | ✅ | ✅ | ✅ | ❌ |
| Export Results | ✅ | ❌ | ✅ | ❌ |
| Check History | ✅ | ✅ | ✅ | ❌ |
| Mobile Friendly | ✅ | ✅ | ✅ | ✅ |
| Educational Content | ✅ | ❌ | ❌ | ❌ |
| Real-time Results | ✅ | ✅ | ✅ | ❌ |
Get detailed certificate information including issuer, validity, key algorithms, and SAN entries.
Receive security recommendations and identify potential vulnerabilities in your SSL configuration.
Quick SSL certificate checks with accurate results and detailed reporting.
Not just a tool - includes comprehensive guides, examples, and tutorials to help you understand SSL security.
SSL (Secure Sockets Layer) and its successor TLS (Transport Layer Security) are security protocols that create an encrypted connection between a web server and a browser. This encryption ensures that all data transmitted between the server and browser remains private and secure.
Used to encrypt data sent to the server. Part of the asymmetric encryption system.
Trusted entity that issues and verifies SSL certificates. Browsers trust certificates from recognized CAs.
Time period during which the certificate is valid. Typically 1-2 years for public certificates.
Additional domains and subdomains covered by a single certificate.
Hierarchy of certificates from the root CA to the end-entity certificate.
Cryptographic algorithms used for key exchange and encryption (RSA, ECC, etc.).
When you visit an HTTPS website, the SSL handshake process occurs to establish a secure connection:
Enhance your website security with these trusted tools and services: