SSL Certificate Checker
Check SSL certificate details for any domain.
Server-Side Tool
SSL Certificate Checker requires making HTTP requests to external servers, which is blocked by browser security policies (CORS). This feature requires a server-side implementation.
Coming Soon
We are building a backend API to support this tool. Check back soon!
In the meantime, try these alternatives:
- Use browser developer tools (F12 → Network tab)
- Check online services like MXToolbox, Cloudflare Radar
- Use curl or wget from your terminal
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.
How to Check SSL Certificates Online — Complete Guide for 2026
An SSL certificate is the security foundation of every modern website. It encrypts sensitive data, builds visitor trust, and improves your Google rankings. But many website owners don't know how to verify their SSL certificate is valid, properly installed, and won't expire unexpectedly. This guide shows you exactly how to check SSL certificates for any domain in seconds—completely free.
Why Check Your SSL Certificate?
Your SSL certificate does three critical jobs: encrypts visitor data, verifies your website's identity, and signals trustworthiness to browsers. When certificates expire, are misconfigured, or issued by untrusted authorities, browsers display prominent security warnings that destroy user confidence and tank conversion rates. Fortune 500 companies have lost millions from expired SSL certificates causing downtime. Checking your certificate status regularly prevents these costly mistakes.
Google explicitly uses HTTPS/SSL as a ranking factor. Websites without valid certificates lose SEO visibility compared to competitors with proper security. Visitors on mobile devices see immediate security warnings if your certificate is invalid, causing 70% of users to abandon your site immediately.
How to Check SSL Certificates in 3 Steps
Our SSL Certificate Checker makes verification instant and effortless.
Step 1: Enter Your Domain. Paste your domain into the input field (example.com or https://example.com—both formats work). No special formatting required.
Step 2: Click "Check Certificate". Hit the blue button and wait 1-3 seconds for results. The tool connects to your domain's server and retrieves live certificate data.
Step 3: Review the Results. Your certificate details appear instantly: issuer, expiration date, validity status, coverage domains, and security strength. Green checkmarks = secure. Red warnings = action required.
What Certificate Information to Verify
When your results load, check these critical fields:
Expiration Date: Your certificate is useless after this date. Set calendar reminders 60 days before expiry to renew in time. Expired certificates cause immediate security warnings.
Issuer: Must be a recognized Certificate Authority (DigiCert, Let's Encrypt, Sectigo, GlobalSign, etc.). Self-signed or unknown issuers trigger browser warnings and indicate compromised certificates.
Certificate Status: "Valid" means visitors see no warnings. "Expired" means immediate renewal required. "Revoked" indicates a security breach requiring emergency replacement.
Domain Coverage: Verify all your domains are listed. Single-domain certificates protect only one domain. Wildcard certificates (*.example.com) protect unlimited subdomains. Multi-domain certificates explicitly list each protected domain.
Certificate Type: Extended Validation (EV) shows your company name in the browser's address bar—builds maximum trust. Organization Validated (OV) verifies your business legitimately exists. Domain Validated (DV) only confirms domain ownership—fastest to obtain.
Common SSL Certificate Issues & Solutions
Certificate Mismatch: The domain you're checking doesn't match the certificate's registered domain. Solution: Verify you're checking the correct domain or request a new certificate covering your actual domain.
Expired Certificate: Browsers display "Your connection is not private" warnings. Solution: Renew immediately through your Certificate Authority—takes 15-30 minutes for domain validation.
Self-Signed Certificate: Only suitable for internal tools or development environments. Solution: Replace with an official certificate from a trusted CA (Let's Encrypt is free and widely accepted).
Chain Certificate Issues: The certificate chain connecting your certificate to root authorities is broken. Solution: Your hosting provider should provide complete chain files—request and install immediately.
Subdomain Certificate Problems: api.example.com and www.example.com may need separate certificates. Solution: Use a wildcard certificate (*.example.com) to cover all subdomains automatically.
Pro Tips for SSL Certificate Management
Check certificates monthly. Set recurring calendar reminders 60 days before expiration. Most CAs send expiration notices, but don't rely on emails—verify manually to avoid downtime.
Use wildcard certificates for multiple subdomains. Wildcard certificates (*.example.com) cost the same as single-domain but protect unlimited subdomains. Much cheaper than individual certificates.
Monitor certificate chain validity. An incomplete or broken certificate chain causes visitor security warnings even if your certificate is valid. Use this tool to verify the complete chain loads correctly.
Automate renewal with your hosting provider. Most modern hosts (Cloudflare, AWS, DigitalOcean, Heroku) offer automatic SSL certificate renewal. Enable this feature to eliminate expiration risks permanently.
Upgrade to EV certificates for e-commerce sites. Extended Validation certificates display your company name in the address bar, build maximum trust with customers, and reduce cart abandonment on payment pages.
Why Use Our Free SSL Certificate Checker?
Instant Results: No registration, no waiting. Get results in under 3 seconds.
Complete Information: See issuer, expiration dates, domain coverage, and security strength in one view. No hidden details.
Mobile Friendly: Check certificates from your phone, tablet, or desktop. Same functionality everywhere.
Privacy Protected: All checks happen securely. We don't log, store, or analyze your domains. Your privacy is guaranteed.
No Rate Limits: Check unlimited domains completely free. No credits, no registration, no surprise charges.
Getting Started Right Now
Don't let an expired or misconfigured SSL certificate damage your website's security and rankings. Use our free SSL Certificate Checker today to verify your certificate status, review coverage details, and identify any security issues. Check your main domain, all subdomains, and client websites—completely free with no limits.
Certificate problems are among the easiest security issues to fix once you identify them. Taking 2 minutes to check your SSL certificate now prevents costly downtime, security breaches, and lost visitor trust later. Start checking your domains today.