SSL/TLS Certificate Grader
Instantly test your SSL/TLS configuration. Get an A-F grade covering certificate validity, protocol versions, cipher suites, and more. No signup required.
What is an SSL/TLS Certificate?
SSL/TLS certificates encrypt communication between a user's browser and your web server. They ensure that sensitive data like passwords, credit card numbers, and personal information cannot be intercepted by attackers. Websites with valid SSL certificates display a padlock icon in the browser address bar and use the HTTPS protocol.
What Does This Tool Check?
- Certificate Validity: expiration date, issuer trust, and chain completeness
- Protocol Versions: TLS 1.0, 1.1 (deprecated), 1.2, and 1.3 support
- Cipher Suites: cipher strength and forward secrecy (ECDHE/DHE)
- Key Strength: RSA/ECDSA key size validation
- HSTS: HTTP Strict Transport Security header presence
- Signature Algorithm: detects weak SHA-1 or MD5 signatures
SSL/TLS Grading Scale
Frequently Asked Questions
What is an SSL/TLS certificate?
An SSL/TLS certificate encrypts communication between a browser and server. It ensures data privacy, authentication, and integrity. Sites with valid certificates show a padlock and use HTTPS.
What TLS version should I use?
Enable TLS 1.2 and TLS 1.3, and disable TLS 1.0 and 1.1. TLS 1.3 offers improved security and 0-RTT handshakes for better performance. TLS 1.0/1.1 were deprecated in 2020 due to BEAST and POODLE vulnerabilities.
How do I get a free SSL certificate?
Let's Encrypt provides free, automated SSL/TLS certificates. Most hosting providers (Vercel, Netlify, Cloudflare, AWS) offer free SSL with one-click setup. Certificates renew automatically every 90 days.
Is this tool free?
Yes, completely free with no signup required. For continuous SSL monitoring plus comprehensive vulnerability scanning, try a free CyberOrbit assessment.