SSL Certificate Scanner
Initialize a targeted deep-scan across ssl certificate endpoints in real-time.
Everything about SSL Certificate
Detailed insights and instructions for using the diagnostic utility effectively.
What is the SSL Certificate tool?
The NetScanner SSL Certificate tool is a free, browser-based diagnostic utility designed for developers and IT professionals. It allows you to securely inspect configurations, verify deployments, and troubleshoot issues in real-time. Unlike older tools, this check runs instantly and fetches live data.
How to use it
Simply enter your target domain name, IP address, or input string into the scanner above and hit Run Analysis. The tool will automatically parse your input, execute the necessary network requests from our secure proxy, and return the formatted results.
Understanding the Results
Our SSL Certificate tool not only provides raw data but also highlights expert recommendations. Look for yellow warning banners—these indicate potential security vulnerabilities or misconfigurations that you should address.
Limitations
Results are cached for a few seconds to prevent abuse. If you recently updated your DNS records or server configuration, please allow time for global DNS propagation before running the check again.
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Tool Details & Usage
Information on inputs, outputs, and limitations.
SSL/TLS Certificate Verification Guide
An expired or misconfigured SSL certificate causes browsers to block access to your website. This tool performs a real-time HTTPS handshake with your server to pull the public certificate and verify its details.
Supported Inputs
- Hostname: e.g.,
thenetworktools.com(Do not includehttps://)
How to Interpret the Output
- Valid From / Valid To: The start and expiration dates of the certificate.
- Issuer: The Certificate Authority (CA) that issued the certificate (e.g., Let’s Encrypt, DigiCert).
- Subject Alternative Names (SANs): The list of domains and subdomains the certificate is valid for.
Realistic Example
If you query a site using Let’s Encrypt:
- Issuer will show
Let's Encrypt Authority X3or similar. - Valid To will be within 90 days of issuance.
- The tool will confirm if the current date falls within the validity window.
Common Errors & Limitations
- Connection Refused: The tool cannot connect if the server blocks traffic on port 443 or is offline.
- Basic Verification: This tool validates the certificate dates and issuer. It does not perform deep vulnerability scanning (like testing for Heartbleed or grading the cipher suites).
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