GuardSSL

What is an SSL certificate and why do I need it?

An SSL (Secure Sockets Layer) certificate, also known as a TLS certificate, is a digital certificate that authenticates a website's identity and enables an encrypted HTTPS connection. It ensures that data transmitted between users and your website remains private and secure. SSL certificates are essential for protecting sensitive information, building customer trust, and improving SEO rankings.

Is this SSL certificate checker free to use?

Yes, our basic SSL certificate checker is completely free with no registration required. You can instantly check any domain's SSL certificate validity, expiration date, and security details. Simply enter a domain name and click check to get complete certificate information.

What are the differences between Free, Pro, and Premium plans?

Our Free plan helps individual developers monitor 1 domain with basic channels. The Pro plan ($5/mo) increases this to 5 domains with 30-day advance notice and all notification channels. The Premium plan ($10/mo) is designed for teams, offering 50 domains monitoring, daily checks, priority support, and upcoming API access.

What notification channels do you support?

We support a wide range of notification channels including Email, Slack, Discord, Telegram, Feishu, and Custom Webhooks. You can configure these in your dashboard to ensure you never miss an expiration alert anywhere you work.

Can I check multiple domains at once?

Yes! With our Pro and Premium plans, you can add and monitor multiple domains simultaneously. The dashboard gives you a unified view of all your certificates' health statuses.

What does 'Days Left' mean in the check results?

Days Left shows how many days remain until your certificate expires. Green indicates safe (30+ days), yellow indicates expiring soon (less than 30 days), and red indicates expired. We recommend renewing your certificate at least 30 days before expiration to avoid security warnings on your website.

Do I need to install anything on my server?

No. Our monitoring service is entirely external and cloud-based. You do not need to install any agents or software on your servers. We simply connect to your public HTTPS endpoint to verify the certificate status.

What is your refund policy?

We offer a 7-day money-back guarantee. If you are not satisfied with our service, you can contact our support team within 7 days of your initial purchase for a full refund, no questions asked.