Free SSL Certificate Checker
Instantly check any domain's SSL certificate, TLS version, DNS, WHOIS, and ATS compliance — completely free, no sign-up required. Sign in to enable certificate expiry monitoring and get notified before they expire.
Three Steps to SSL Peace of Mind
Monitor your SSL certificates in minutes — no complex setup required.
Enter Your Domain
Type any domain into the search bar and click Check. Get instant results — no sign-up required.
Try checking any domain
Why Choose SSL Checker?
Everything you need to keep your SSL certificates healthy
Automated Monitoring
Schedule SSL checks every 1–10 days. Never miss an expiring certificate again.
Team Collaboration
Share domain lists with your team. Manage roles with owner, editor, and viewer permissions.
Multi-Channel Alerts
Get notified via Email or Feishu. Configure your own alert thresholds.
Comprehensive Checks
SSL certificates, TLS versions, DNS records, WHOIS data, ICP status, and Apple ATS compliance — all in one place.
Instant Results
Add a domain and get full check results immediately. Manual re-check anytime with a single click.
100% Free
No credit card, no trial period. Monitor up to 100 domains per team completely free.
Trusted by Teams Worldwide
Helping teams keep their SSL certificates healthy with comprehensive monitoring.
Languages
0
Multilingual interface for global teams
Check Dimensions
0
SSL, TLS, DNS, WHOIS, ICP, and ATS
Domains per Team
0
Monitor up to 100 domains completely free
Frequently Asked Questions
Everything you need to know about SSL Checker
What is SSL Checker?
SSL Checker is a free team-based tool that monitors your domains' SSL certificates, TLS versions, DNS records, WHOIS information, ICP status, and Apple ATS compliance. It alerts you before certificates expire.
Is SSL Checker free?
Yes, SSL Checker is completely free. You can monitor up to 100 domains per team, invite up to 100 members, and create up to 10 teams — all at no cost.
How does team collaboration work?
Create a team and invite members via email or shareable link. Assign roles (owner, editor, viewer) to control who can add domains, trigger checks, or manage the team.
What notification channels are supported?
SSL Checker supports Email and Feishu (Lark) notifications. Each team member can configure their own preferred channels and alert thresholds.
How often are certificates checked?
Team admins can set the check interval from 1 to 10 days. You can also trigger a manual check anytime (with a 5-minute cooldown per team).
What information does a domain check include?
Each check covers SSL certificate details (expiry, issuer, SAN, fingerprint), TLS version support (1.0–1.3), DNS records (A, AAAA, CNAME, NS, MX, TXT), WHOIS data, ICP filing status, and Apple ATS compliance.
Start Monitoring Your SSL Certificates
Enter any domain above to get an instant SSL report — completely free, no sign-up required.