SSL Lookup

Get all possible details about an SSL certificate.

Lookup Type: SSL Certificate
Protocol: HTTPS
Response: Real-time

SSL Lookup

Lookup SSL Certificate
Enter the domain name
Default: 443 for HTTPS
Key Features
  • Real-time SSL certificate lookup
  • Expiration date verification
  • Certificate authority information
  • Signature validation
  • No registration required

How It Works

1
Enter Domain

Provide domain name and port

2
Connect

Establish HTTPS connection

3
Extract

Retrieve certificate data

4
Display

Show detailed information

Perfect For

Certificate Verification

Verify SSL certificates are valid and not expired.

Certificate Monitoring

Track expiration dates before they expire.

Security Audits

Audit website security configurations.

Learning

Understand SSL certificate structure and details.

Why Choose Our Tool?

🔍
Instant Lookup

Real-time certificate checking

📊
Detailed Info

Complete certificate details

🔒
Secure Check

HTTPS validation

📱
Mobile Friendly

Works on all devices

⚡
Fast Results

Seconds to complete

🆓
100% Free

No registration needed

Rate Your Experience

Help us improve with your feedback!

😍

Loved it? Rate us:

0 of 0 ratings

4618+ people love our tools

Complete Guide

What is an SSL Lookup?

An SSL Lookup is a tool that retrieves and displays information about SSL/TLS certificates installed on web servers. It connects to a domain on a specified port (usually 443) and extracts certificate data such as the issuer, expiration date, organization, and certificate validity status.

Why Check SSL Certificates?

  • Expiration Monitoring: Know when certificates expire before they do
  • Security Verification: Ensure proper encryption is in place
  • Compliance: Meet security requirements and standards
  • Trust Validation: Verify trusted certificate authorities
  • Troubleshooting: Diagnose SSL/TLS connection issues

Understanding Certificate Details

  • Common Name (CN): The domain the certificate is issued for
  • Organization: Company name requesting the certificate
  • Issued Date: When the certificate became active
  • Expiry Date: When the certificate will expire
  • Signature Type: Encryption algorithm used (RSA, ECDSA, etc.)
  • Certificate Authority: Trusted entity that issued the cert

How to Use This Tool

  1. Enter the domain name (e.g., example.com)
  2. Specify the port (usually 443 for HTTPS)
  3. Click "Lookup Certificate"
  4. Review the certificate details
  5. Check expiration date and validity

Best Practices

  • Renew certificates 30 days before expiration
  • Use certificates from trusted CAs
  • Monitor all domains regularly
  • Keep certificate backups safe
  • Update to stronger encryption algorithms
Pro Tip: Set calendar reminders 30 days before certificate expiration to ensure timely renewal and prevent service disruptions.

FAQ

Usually port 443 for HTTPS. Some services use alternative ports like 8443. Check your server configuration if you're unsure.
At least monthly. Automate checks using monitoring services for critical domains to catch expiration issues early.
Immediately renew and reinstall the certificate. Expired certificates cause browser warnings and can affect SEO rankings.
A wildcard certificate (e.g., *.example.com) secures a domain and all its subdomains, shown as "*.domain" in the certificate name.
Yes, check one domain at a time with this tool. For multiple domains, use automated monitoring services.
This is the Certificate Authority (CA) that verified your domain and issued the certificate. Well-known CAs include Let's Encrypt, DigiCert, and Sectigo.
Yes, we only read public certificate information. No sensitive data is accessed or transmitted.
Yes! 100% free with unlimited certificate lookups and no registration required.

Popular tools