Online SSL Certificate Checker

Verify SSL/TLS certificate details, expiration dates, and issuing authority for any domain instantly.

Why Every Website Needs a Valid SSL Certificate

An **SSL (Secure Sockets Layer)** certificate is a digital certificate that authenticates a website's identity and enables an encrypted connection. It is the technology that powers the padlock icon and the **HTTPS** protocol in your browser bar.

SEO & Trust Benefits

Since 2014, Google has used **HTTPS as a ranking signal**. Beyond SEO, having a valid SSL certificate builds trust with your visitors, ensuring that their sensitive data (like passwords and credit card info) is protected from interception by hackers.

Common SSL Errors

Our **Online SSL Checker** helps you identify common pitfalls such as expired certificates, name mismatches (where the certificate name doesn't match the domain), and untrusted root authorities. Keeping your certificate updated is crucial for maintaining a professional online presence.

Troubleshooting Your SSL Installation

  • Expiration: Most modern certificates (like Let's Encrypt) last for 90 days. Ensure your auto-renewal cron jobs are functioning correctly.
  • Intermediate Certificates: Ensure you've installed the full "CA-Bundle" so that all browsers can verify the trust chain.
  • Mixed Content: After installing SSL, ensure all images and scripts are loaded via HTTPS to avoid "insecure content" warnings.