Free SSL Certificate Inspector & Checker
SSL/TLS certificates encrypt communications between browsers and servers, establishing trust and protecting sensitive data. Our free SSL inspector performs a full analysis of your certificate configuration, including validity, chain of trust, protocol versions, cipher suites, and security headers to ensure your website is properly secured.
What This Tool Checks
Comprehensive analysis powered by Vysiro's scanning engines
Certificate validity and expiration check
Chain of trust verification
TLS protocol version analysis (1.2, 1.3)
Cipher suite strength evaluation
Certificate transparency log check
HSTS header detection
Mixed content warning detection
Wildcard and SAN validation
How It Works
Get results in seconds with our automated scanning process
Enter your domain name in the scanner
We connect to your server and retrieve the SSL certificate
The full certificate chain is validated against trusted CAs
We test supported TLS protocol versions and cipher suites
Security headers (HSTS, etc.) are checked
You receive a detailed security report with ratings
Frequently Asked Questions
Everything you need to know about ssl certificate inspector
What is an SSL certificate?
An SSL (Secure Sockets Layer) certificate is a digital certificate that authenticates a website's identity and enables encrypted connections. Modern certificates use TLS (Transport Layer Security), the successor to SSL. They ensure data transmitted between users and websites remains private and integral.
How do I know if my SSL certificate is expiring?
Our SSL inspector shows your certificate's exact expiration date. Certificates typically expire after 1 year and must be renewed. Vysiro monitors your certificates continuously and sends alerts 30, 14, and 7 days before expiration to prevent outages.
What TLS version should my server support?
Your server should support TLS 1.2 and TLS 1.3, and disable older protocols (TLS 1.0, TLS 1.1, SSL 2.0, SSL 3.0) which have known vulnerabilities. TLS 1.3 offers the best performance and security with faster handshakes and stronger cipher suites.
What is certificate chain of trust?
The certificate chain of trust connects your server's certificate to a trusted root Certificate Authority (CA) through one or more intermediate certificates. If any link in the chain is missing or invalid, browsers will show security warnings to visitors.
What is HSTS and why does it matter?
HSTS (HTTP Strict Transport Security) is a security header that tells browsers to always connect using HTTPS, preventing downgrade attacks and cookie hijacking. Enable HSTS with a long max-age and includeSubDomains for full protection.
Is a free SSL certificate as secure as a paid one?
Yes, free certificates from Let's Encrypt provide the same encryption strength as paid certificates. The difference is in validation level (DV vs OV vs EV), warranty, and support. For most websites, a free DV certificate is perfectly adequate.
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