SSL Checker

Instantly verify SSL certificate status, expiry, TLS version, fingerprints, HSTS and full certificate chain for any website.

100% Free Instant Results No Registration

Enter website to check SSL certificate

Instant CheckResults in under 3 seconds

Full ChainChecks entire cert chain

TLS DetectionDetects TLS 1.2 and 1.3

FingerprintsSHA-256 & SHA-1

Secure by designYour request is processed instantly over an encrypted connection and never stored on our servers.

Encrypted in transitSubmitted over HTTPS/TLS — nothing is sent in plain text.

Never storedThe domain you check and its results are not saved to any database or log.

No third-party sharingYour request is never shared with ads, trackers, or outside services.

Processed instantlyChecked on request and discarded immediately after the response.

About SSL Checker

What Is an SSL Checker?

An SSL checker verifies that a website's SSL/TLS certificate is valid, properly installed, and not expired or misconfigured — issues that can trigger browser security warnings, break HTTPS, and directly damage user trust and SEO, since HTTPS is a confirmed ranking signal.

How Our SSL Checker Works

Enter a domain, and the tool inspects its SSL certificate, checking validity, expiration date, issuing authority, and whether the chain of trust is properly configured.

How to Use the SSL Checker

Enter the domain you want to check
Click Check SSL
Review the certificate's validity, expiration, and configuration details
Fix any flagged issues with your hosting provider or certificate authority

Key Features

Full certificate details — issuer, expiration, and validity status
Chain of trust verification — catches misconfigurations that browsers may flag
Instant results — no need to inspect certificate details manually in a browser

Who Uses This Tool

Site owners monitor certificate expiration to avoid unexpected HTTPS warnings for visitors. Developers troubleshoot SSL configuration issues after a server change.

Frequently Asked Questions

What happens if my SSL certificate expires?
Browsers will show visitors a security warning and may block access entirely, which can seriously damage trust and traffic until it's renewed.

Is this tool free?
Yes, checking SSL certificate status is completely free.

Frequently Asked Questions

What does an SSL checker do?

An SSL checker connects to your website over HTTPS, retrieves the SSL/TLS certificate, and displays key details — including the issuer, expiry date, validity, TLS version, cipher suite, SANs, fingerprints, and HSTS status.

How do I fix an expired SSL certificate?

Log in to the platform where you purchased your SSL (or use a free CA like Let's Encrypt), renew or reissue the certificate, then install the new certificate on your server. Most hosting control panels (cPanel, Plesk) have a one-click SSL renewal option.

What is the difference between TLS 1.2 and TLS 1.3?

TLS 1.3 is faster and more secure than TLS 1.2 — it removes weak cipher suites and reduces the handshake to one round trip (vs two for TLS 1.2). Modern servers should support TLS 1.3 while keeping TLS 1.2 as a fallback.

What is HSTS and why does it matter?

HSTS (HTTP Strict Transport Security) is a security header that forces browsers to always use HTTPS for your domain, preventing protocol downgrade attacks. Without HSTS, attackers can intercept HTTP redirects to HTTPS.

Why do I see a certificate warning in browsers?

Common reasons: the certificate is expired, the domain doesn't match the certificate's Common Name or SANs, the certificate chain is incomplete, or the certificate is self-signed. Our SSL checker identifies all of these issues.

What are Subject Alternative Names (SANs)?

SANs are additional domain names secured by a single SSL certificate. Since Chrome 58 (2017), browsers only trust the SAN fields and ignore the Common Name. A certificate with SAN: example.com, www.example.com covers both domains.