Verify SSL/TLS certificate validity, expiration dates, and HTTPS security status
SSL/TLS certificate checking verifies the security credentials that enable HTTPS encryption on websites. Our free SSL checker instantly analyzes certificate validity, expiration dates, issuer information, certificate chains, and security protocols. Whether you're monitoring your own website's SSL, verifying security before transactions, or troubleshooting HTTPS errors, our tool provides comprehensive certificate analysis.
SSL certificates encrypt data between browsers and servers, protecting passwords, credit cards, and sensitive information. Regular SSL monitoring prevents security warnings, maintains search rankings, and ensures customer trust. Use our tool alongside DNS lookup and WHOIS checker for complete domain security analysis.
Enhance your website security analysis with our comprehensive network diagnostic tools:
SSL (Secure Sockets Layer) certificate encrypts data between your browser and website servers, protecting sensitive information like passwords and credit cards. It enables HTTPS (the padlock icon in your browser), verifies website authenticity, prevents man-in-the-middle attacks, and is required for secure online transactions. Google also ranks HTTPS sites higher in search results. Our SSL checker verifies certificate validity, expiration, issuer, and security configuration. Learn more in our security blog.
Enter the domain name in our SSL checker tool above. It instantly verifies the SSL certificate status, expiration date, issuer information, and security protocols. You can also check manually by looking for the padlock icon in your browser's address bar, clicking it to view certificate details. Valid certificates show green padlock, while expired or invalid certificates trigger browser warnings. Combine with our DNS lookup tool for comprehensive domain analysis.
When SSL certificates expire, browsers display security warnings (Your connection is not private), visitors cannot access your website without bypassing warnings (which most won't do), search rankings drop, payment processing fails, email security breaks, and customer trust erodes. Certificates typically expire after 90 days (Let's Encrypt) or 1 year (commercial CAs). Monitor expiration with our tool and renew 30 days before expiry. Check domain expiration alongside SSL expiration.
SSL (Secure Sockets Layer) is the older encryption protocol, now deprecated due to security vulnerabilities. TLS (Transport Layer Security) is the modern, more secure successor. Current versions are TLS 1.2 and TLS 1.3. While people still say SSL certificate, they actually mean TLS certificate. Our tool checks TLS protocols and recommends disabling outdated SSL/TLS versions for maximum security.
Get free SSL certificates from Let's Encrypt (most popular, 90-day validity, auto-renewable), Cloudflare SSL (included with free plan), ZeroSSL (3 free certificates), or through hosting providers like cPanel, Plesk, or WordPress hosts that offer free SSL. Commercial certificates from DigiCert, Sectigo, or GoDaddy cost $50-$300/year and include warranty, extended validation (EV), and wildcard options. Use our IP lookup to verify hosting provider.
SSL certificate chain is the hierarchy of trust from your certificate to the root Certificate Authority (CA). It includes: your domain certificate (leaf), intermediate certificates, and root CA certificate. Incomplete chains cause browser errors like NET::ERR_CERT_AUTHORITY_INVALID. Our tool verifies complete certificate chains and identifies missing intermediate certificates that break HTTPS.