Free SSL Certificate Checker & HTTPS Security Validator
Verify SSL/TLS certificates, monitor expiration dates, and ensure your website's HTTPS security is properly configured. Get instant insights into certificate validity, issuer information, and encryption protocols with our comprehensive SSL checker tool.
Our SSL certificate checker is a professional-grade security tool that analyzes SSL/TLS certificates for any domain or hostname. In today's web security landscape, maintaining valid HTTPS certificates is critical for protecting user data and maintaining trust. This tool provides comprehensive certificate validation, helping website administrators, developers, and security professionals monitor SSL certificate health, verify proper HTTPS configuration, and prevent security warnings that can damage user trust and SEO rankings.
Why SSL Certificate Validation Matters: SSL/TLS certificates are the foundation of HTTPS security, encrypting data transmission between browsers and servers. Expired or misconfigured certificates trigger browser security warnings, damage SEO performance, and expose users to man-in-the-middle attacks. Regular SSL certificate monitoring ensures uninterrupted secure connections, maintains search engine rankings, and protects your website's reputation. Our checker validates certificate chains, verifies domain matching, and alerts you to expiration risks before they impact your users.
Features: Real-time certificate validity verification, automatic expiry countdown with color-coded warnings (7/30/90-day alerts), complete issuer and subject details, Subject Alternative Names (SAN) analysis for multi-domain certificates, SHA-256 fingerprint verification for certificate pinning, TLS protocol version detection (TLS 1.2, 1.3), cipher suite identification for security auditing, certificate chain validation, serial number tracking, and one-click copy functionality for technical details. Perfect for DevOps automation, security audits, and compliance monitoring.
Best Practices: Check SSL certificates before expiration (recommended: 30 days in advance), verify SAN entries include all your domains and subdomains, ensure TLS 1.2 or higher is enabled, monitor certificate authorities for trusted issuers, maintain certificate renewal automation, and document fingerprints for certificate pinning in mobile applications. Regular SSL monitoring prevents downtime and maintains continuous HTTPS protection.