SSL Certificate Checker
Verify certificate expiry and cipher standards.
Free · No sign-up · Use it instantly
SSL Handshake Audit
Perform simulated handshakes, fetch cipher properties, and certificate expiries.
01 / How it works
Understanding Your SSL Certificate Audit
Your SSL certificate is valid and active. The certificate chain resolves to a trusted root authority. TLS 1.3 encryption is active, preventing eavesdropping and protecting credentials in transit. Remember to configure renewal triggers before expiration to prevent browser alerts.
The Complete Guide to SSL/TLS Certificates and HTTPS
Why SSL/TLS is Mandatory
Secure Sockets Layer (SSL) and Transport Layer Security (TLS) establish an encrypted link between a web server and a browser. Without SSL, all traffic is sent in plaintext, allowing malicious actors to intercept passwords, session tokens, and credit card details.
How SSL Verification Works
When a user visits an HTTPS website: 1. SSL Handshake: The browser requests the server's identity. The server sends its SSL certificate. 2. Trust Chain Validation: The browser verifies the certificate against a pre-installed list of trusted Root Certificate Authorities (like Let's Encrypt or DigiCert). 3. Key Exchange: Once validated, the server and browser exchange symmetric keys to encrypt all transmission sessions.
Common Causes of SSL Certificate Errors
- Certificate Expiration: Standard certificates expire. Let's Encrypt certificates last 90 days.
- Name Mismatch: The certificate was issued for a different domain name.
- Untrusted Root: The certificate was self-signed or issued by a non-recognized authority.
- Mixed Content: The page is loaded over HTTPS, but assets (images, scripts) are loaded over insecure HTTP, breaking browser security symbols.
02 / FAQ
Questions, answered.
What is a wildcard SSL certificate?
A wildcard certificate protects a domain and all its subdomains (e.g. *.example.com) under a single certificate registration.
Why are Let's Encrypt certificates only valid for 90 days?
Shorter lifetimes limit damage from compromised keys and encourage automated renewal pipelines.
What is the difference between SSL and TLS?
TLS is the modern, secure successor to SSL. While the term "SSL" is still commonly used, all modern connections run on TLS 1.2 or 1.3.
How do I fix a "Your Connection is Not Private" error?
Verify that the server certificate has not expired, matches the host domain, and has a valid root CA trust path.
What is SNI (Server Name Indication)?
SNI is a TLS extension that allows a single server IP address to host and serve distinct SSL certificates for multiple domains.
Does Deployxa provide free SSL certificates?
Yes! Deployxa automatically provisions, binds, and renews free SSL certificates for all custom domains deployed on our network.
What are cryptographic ciphers?
Ciphers are algorithms that encrypt session data. Modern TLS connections restrict handshake suites to strong ciphers like AES-GCM.
What is a CSR (Certificate Signing Request)?
A CSR is an encoded file containing public key information and contact details, sent to a CA to request certificate issuance.
04 / Guides
Read next.
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