SSL/TLS Certificate Checker
Instantly verify your SSL installation, check certificate validity, expiration dates, and security configuration.
Enter Domain to Check
Secure Your Website & Build User Trust
SSL/TLS isn't just about encryption—it's a trust signal. Browsers penalize "Not Secure" sites, and Google prioritizes HTTPS. Our scanner digs deep into your certificate chain to ensure you are fully protected.
What is an SSL/TLS Certificate?
SSL (Secure Sockets Layer) and its successor TLS (Transport Layer Security) are protocols that encrypt data between a user's browser and your server. It ensures that sensitive info like passwords and credit cards cannot be intercepted.
Why Run a Check?
Deep Security Analysis
We examine the handshake, cipher suites, and certificate validity in real-time.
Expiry Monitor
Checks the valid-from and valid-to dates to warn you about impending expirations.
Protocol Check
Verifies support for modern TLS 1.2 and 1.3, flagging obsolete SSLv3 or TLS 1.0.
Issuer Validation
Identifies the Certificate Authority (e.g., DigiCert, Let's Encrypt) and signature algorithm.
Key Strength
Analyzes the public key size (e.g., RSA 2048-bit) to ensure it meets modern standards.
Chain Issues
Detects broken or incomplete intermediate certificate chains that cause mobile errors.
Cross-Browser
Simulates checks from different clients to ensure universal compatibility.
Who Needs This Tool?
E-Commerce
Protect payments.
SaaS
Secure uer data.
Fintech
Compliance.
DevOps
Config validation.
How It Works
We perform a handshake with your server to inspect the credentials it presents.
1. Connect
We resolve your IP and initiate a secure connection on port 443.
2. Handshake
We inspect the certificate details sent by the server during the TLS handshake.
3. Validate
We recursively verify the Certificate Authority chain to the root.
Why Use Our SSL Checker?
Instant Diagnosis
Check your automated SSL health status immediately, identifying issues before they affect your users.
Deep Analysis
Get detailed insights on cipher suites, protocols (TLS 1.2/1.3), and certificate chain validity.
Trust Verification
Ensure your visitors trust your site with fully valid HTTPS configuration, boosting conversion and SEO.
Key SSL Elements Check
Certificate Validity
Verifies the expiration dates and ensures your certificate is currently active.
Protocol Support
Checks for modern TLS 1.2 and 1.3 compliance while flagging insecure older protocols.
Chain of Trust
Validates the complete chain from your server certificate up to a trusted root CA.
Configuration
Analyzes key exchange algorithms and cipher strength to prevent vulnerabilities.
Frequently Asked Questions
Is a free SSL like Let's Encrypt enough?
For most blogs and small businesses, yes. Let's Encrypt provides the same level of encryption as paid certs. Paid certs offer benefits like warranties and organization validation (OV/EV).
TLS vs SSL - what's the difference?
SSL (Secure Sockets Layer) is the old standard. TLS (Transport Layer Security) is the modern, secure version. People still say "SSL" out of habit, but we technically use TLS 1.2 or 1.3.
How often should I check my SSL certificate?
It is good practice to check whenever you renew or install a certificate. Regular checks ensure no intermediate expirations catch you off guard.
Does SSL slow down my site?
Negligibly. Modern hardware handles encryption effortlessly. In fact, HTTP/2 (which speeds up sites) requires HTTPS, so SSL actually enables better performance.
What is a "Mixed Content" warning?
This happens when your secure HTTPS page loads insecure HTTP resources (images, scripts). Browsers block these to protect the user, potentially breaking your page layout.
What if my certificate is issued by a different provider?
Our tool supports all major Certificate Authorities (CAs) including DigiCert, Comodo, Let's Encrypt, and Cloudflare. We verify the chain regardless of the issuer.