Is SSL Certificate Checker free?

Yes, completely free with unlimited checks. No registration, credit card, or hidden fees required. Check as many domains as you need.

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

An SSL certificate encrypts data between your browser and website servers. Checking it verifies your website is secure, trusted by browsers, and free from vulnerabilities like expired certificates that cause security warnings.

How long does it take to check an SSL certificate?

Results appear instantly—usually within 1-3 seconds. The tool connects directly to your domain's server and retrieves certificate information in real-time without delays.

Can I check wildcard or multi-domain SSL certificates?

Yes. The checker displays all domain names covered by the certificate, including wildcard domains (*.example.com) and Subject Alternative Names (SANs). It shows exactly which domains are protected.

Does SSL Certificate Checker work on mobile devices?

Yes, works on iPhone, Android, tablets, and desktop browsers. The interface is fully responsive and optimized for smaller screens with touch-friendly buttons.

What does 'Self-Signed Certificate' mean?

A self-signed certificate is issued by the domain owner rather than a trusted Certificate Authority. Browsers flag these as untrusted and show security warnings. They're only suitable for internal or development use, not public websites.

Is my domain safe when I use this tool?

Yes, completely safe. All certificate checks use standard HTTPS protocols. We don't store, log, or analyze your domain data. Your privacy is fully protected.

What should I do if my SSL certificate shows as expired?

Immediately renew your certificate with your Certificate Authority or hosting provider. Expired certificates cause browser security warnings and damage SEO rankings. Renewal typically takes minutes to hours.

Can I check subdomains like api.example.com?

Yes, enter the full subdomain and the tool will check its specific SSL certificate. Subdomains may have separate certificates or share a wildcard certificate—the checker shows which applies.

What SSL certificate formats and versions does this tool support?

Supports all standard formats: X.509 (v1, v2, v3), RSA, ECDSA, and DSA certificates. Also checks EV (Extended Validation), OV (Organization Validated), and DV (Domain Validated) certificates.

free

SSL Certificate Checker — free

Check SSL certificate details for any domain.

How to use SSL Certificate Checker

Enter Your Domain Name

Click the text input field labeled 'Enter Domain' at the top of the checker. Type your domain (e.g., example.com or https://example.com) without spaces. You can include or exclude the protocol—the tool handles both formats automatically.

Click the Check Certificate Button

Press the blue 'Check Certificate' button located directly below the input field. The tool will immediately begin scanning the SSL certificate for that domain. A loading spinner will appear while the connection is being verified.

Review Certificate Details

View the results table showing Certificate Status (Valid/Expired/Self-Signed), Issuer name, Subject, Issue Date, Expiry Date, and Certificate Version. Green checkmarks indicate secure certificates; red warnings indicate potential security issues.

Export or Share Results

Click the 'Download Report' button to save certificate details as a PDF, or use the 'Copy to Clipboard' button next to each field to copy specific information for documentation or sharing with your team.

Frequently Asked Questions

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