Our free SSL Certificate Checker, a vital tool designed to enhance your website’s security by providing in-depth insights into the SSL certificates of any website. This free SSL checker is crafted to help website owners, developers, and security enthusiasts to verify the authenticity, validity, and configuration of SSL/TLS certificates, ensuring secure connections and data integrity.
SSL (Secure Sockets Layer) and its successor, TLS (Transport Layer Security), are fundamental to secure internet communication, encrypting data between web servers and clients to thwart eavesdroppers, tamperers, and impersonators. Our SSL Certificate Checker demystifies the details of these certificates, offering a transparent view into the security measures protecting your favorite websites.
If you can’t afford to purchase a premium SSL certificate, there are some free SSL certificates available for you to use.
Free SSL Checker Usage Instructions
Enter Website URL: In the provided editbox, input the full URL of the website you wish to check, including the “https://” prefix.
Check SSL Certificate: Click the “Check SSL Certificate” button to initiate the analysis. The tool will securely connect to the specified website and retrieve its SSL/TLS certificate details.
Review Results: Upon successful retrieval, the certificate’s details are displayed in a structured table below the input form. If the website’s SSL/TLS certificate has issues or cannot be reached, an error message will be displayed.
Understanding the SSL Results Table
The results table provides a comprehensive breakdown of the SSL/TLS certificate’s properties. Here’s what some of the key fields mean:
Issuer: The Certificate Authority (CA) that issued the SSL certificate. A reputable issuer enhances trust.
Valid From: The date the SSL certificate became valid. It indicates when the certificate was issued.
Valid To: The expiration date of the SSL certificate. Certificates need to be renewed before this date.
Subject: The entity the SSL certificate was issued to, typically containing the domain name.
Subject Alternative Name: Additional hostnames covered by the SSL certificate, allowing a single certificate to secure multiple domain names.
Signature Algorithm: The algorithm used to sign the SSL certificate, essential for ensuring the certificate’s integrity.
Key Size: The length of the cryptographic key used in the SSL certificate, measured in bits. Longer keys offer stronger security.
Serial Number: A unique number assigned to the SSL certificate by the issuer for identification purposes.
SHA1/SHA256 Fingerprint: Hash values of the certificate data, providing a unique identifier that can be used to verify the SSL certificate’s integrity.
Tips for Secure SSL/TLS Configuration
Regularly Update: Ensure your website’s SSL/TLS certificates are up to date and renew them before they expire to maintain uninterrupted encryption.
Strong Algorithms: Use certificates with robust signature algorithms and adequate key sizes to safeguard against cryptographic attacks.
Configure Correctly: Properly configure your server to use secure protocols like TLS 1.2 or higher, and disable outdated protocols like SSLv2 and SSLv3.
Multi-Domain Support: If you have multiple domains, consider using certificates with Subject Alternative Names (SANs) or wildcard certificates to simplify management.
Use a Checker Tool: Once you have configured and deployed your certificate to your website, use a free SSL checker tool like this one to check the validity.