The problem Developers and ops teams get blindsided by expired SSL certificates because checking expiry requires remembering a multi-flag openssl s_client command and parsing its dense output — so certs get forgotten until the site goes red. If you've hit this before, you know how it goes — you Google the openssl command, squint at wall-of-text output, and compute the expiry date by hand. Or you just forget until monitoring fires. As a solution, I created cert-peek Check SSL certificate expiry and details for any domain in seconds from your terminal It's zero-dependency Node.js, so you can run it immediately without installing anything: npx cert-peek github.com Enter fullscreen mode Exit fullscreen mode Output: $ npx cert-peek github.com Domain: github.com Issuer: DigiCert Inc Valid from: 2025-03-12 Expires: 2026-03-12 Status: OK -- 303 days remaining Enter fullscreen mode Exit fullscreen mode Check multiple domains at once: npx cert-peek google.com stripe.com myproductionsite.com Enter fullscreen mode Exit…