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Check SSL/TLS certificate details and expiry for any domain.
Inspect any HTTPS site's TLS certificate — issuer, subject, validity dates, days until expiry, SAN list, key type, and signature algorithm. Detects expired or near-expiry certificates. Connects directly via TLS from our server — no third-party API.
SSL Certificate Checker provides a direct TLS connection to inspect any HTTPS site's certificate details, including issuer, validity dates, days until expiry, SAN lists, and signature algorithms. Operating without third-party APIs and offering generous rate limits, it delivers quick, reliable visibility into security configurations.
Good to know: This tool focuses on live TLS handshake inspection and does not perform deep automated vulnerability scanning or bulk domain monitoring.
Follow these steps to inspect TLS certificate details, verify issuer information, and check expiry dates for any HTTPS website.
Access the SSL Certificate Checker tool
Navigate to the SSL Certificate Checker tool page to begin your security inspection.
Enter the target domain name
Type or paste the full URL or hostname of the HTTPS site you wish to analyze into the input field.
Initiate the direct TLS connection
Click the check button to establish a direct server-side connection and retrieve the live certificate data.
Review certificate validity and expiry
Examine the validity dates and days until expiry to ensure the certificate is not expired or nearing its end.
Inspect technical certificate details
Analyze the issuer, subject, SAN list, key type, and signature algorithm for comprehensive security verification.
Estimated time: PT1M
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