utilitech

SSL Certificate Checkerตรวจสอบใบรับรอง SSL

Check any website's HTTPS certificate like a browser does — trusted or not, expiry, hostname match, full chain, TLS versions, cipher and HSTS.ตรวจใบรับรอง HTTPS ของเว็บไซต์แบบเดียวกับเบราว์เซอร์ — น่าเชื่อถือหรือไม่ วันหมดอายุ ชื่อโดเมนตรงหรือไม่ chain ทั้งหมด เวอร์ชัน TLS cipher และ HSTS

How to use
  • Type a website (or paste a full URL, with a port if it isn't 443) and press Check.
  • The banner at the top tells you what a browser would do: show the padlock, or block the page with a warning such as NET::ERR_CERT_DATE_INVALID.
  • Checks explains each part — trusted issuer, hostname match, expiry, chain signatures, TLS version and HSTS. Certificate chain shows every certificate from the site's own to the root, with names (SAN), key, serial and fingerprints.
Good to know
  • Our server connects to the site the same way a browser does and verifies the chain against the Mozilla root store (the roots Firefox uses, nearly the same as Chrome's). Try the badssl.com examples to see what failures look like.
  • "Incomplete chain" means the server doesn't send its intermediate certificate. Desktop Chrome can fetch it on its own, so the site may look fine to you but fail in other browsers, apps and APIs.
  • Only public websites can be checked. We don't store the addresses you check.