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Check HTTPS certificate status for the active tab. SSL Checker helps you quickly analyze SSL certificate and domain registration details for the website you are currently viewing. With a single click, you can check whether a website's SSL certificate is valid, when it expires, who issued it, which domains are covered, and what TLS settings are being used. The extension also includes Whois/RDAP registration details, helping website owners, developers, SEO specialists, IT administrators, and security professionals review important domain and HTTPS information without leaving the browser. How It Works: - Open any website in Chrome - Click the SSL Checker extension icon - View SSL certificate, TLS, SAN, and Whois details instantly What SSL Checker Shows: - SSL certificate validity - Expiration date and days remaining - Certificate issuer and subject - Serial number - SHA-256 fingerprint - Public key type and key size - TLS protocol and cipher - Subject Alternative Names (SANs) - Whois/RDAP domain registration details - Registrar information - Domain creation, update, and expiration dates - Name servers and domain status Why Use SSL Checker: - Quickly identify expired or invalid certificates - Review HTTPS certificate details in one click - Check whether the current hostname is covered by the certificate - Monitor certificate expiration before it affects visitors - View domain registration information alongside SSL details - Useful for website audits, development, SEO checks, and security reviews Privacy: SSL Checker only checks the hostname of the active tab when you open the extension. It does not read page content, cookies, form data, passwords, browsing history, or local storage. The active hostname is sent to RightSSL.com to retrieve SSL certificate and Whois/RDAP information.
Aug 7, 2026
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.