Comprehensive online SSL certificate management suite providing five essential tools for certificate operations. The suite enables real-time SSL certificate validation, self-signed certificate generation, multi-format certificate conversion, certificate and key matching verification, and Certificate Signing Request (CSR) generation. Project Scope: - Real-time SSL certificate validation with detailed chain analysis - Self-signed certificate generation with customizable parameters - Multi-format certificate conversion (PEM ↔ PFX, PEM ↔ DER) - Certificate and private key matching verification - Certificate Signing Request (CSR) generation with ISO 3166-1 validation - DNS resolution and security assessment - Cloudflare Turnstile CAPTCHA protection Architecture: - Frontend: Next.js 16, React 19, TypeScript, TailwindCSS, shadcn/ui - Backend: PHP 8.3 with OpenSSL extension - Security: Cloudflare Turnstile CAPTCHA for abuse prevention - Deployment: Nginx with PHP-FPM Key Features: 1. Check Certificate Website: Real-time SSL certificate validation with detailed chain analysis, DNS resolution, expiration dates, issuer information, and security assessment 2. Generate Certificate: Self-signed certificate generation supporting multiple key types (RSA 2048/4096 bits, DSA, ECDSA P-256/P-384/P-521), configurable validity periods, and Subject Alternative Name (SAN) support 3. Convert Certificate: Multi-format conversion between PEM, PFX, and DER formats with key format conversions 4. Match Certificate: Certificate and private key matching verification with fingerprint comparison to ensure certificate-key pairs are correctly matched 5. Generate CSR: Certificate Signing Request generation with manual country/state/city input, ISO 3166-1 alpha-2 country code validation, and comprehensive certificate information fields Security Features: - Cloudflare Turnstile CAPTCHA on all certificate generation operations - Server-side validation of all inputs - ISO 3166-1 alpha-2 country code validation for CSR generation - No certificate or key data stored on server - HTTPS-only API endpoints - Server-side OpenSSL operations for security Results: - Comprehensive SSL certificate management tools accessible online - Real-time certificate validation and analysis - Secure certificate generation and conversion operations - User-friendly interface with detailed certificate information - Privacy-first approach with no data storage - Production-ready deployment with security best practices
