SSL Checker Command Helper

Generate safe terminal commands for checking SSL certificates, HTTPS redirects, issuer, SAN names and expiry without storing credentials.

Browser JavaScript cannot inspect full certificate chains safely, so this helper generates terminal commands instead of making a remote request.
SSL check commands 

        

    

                

            
                    

                        
How to use this tool

                        
    
                                                            
  1. Enter a domain without protocol or path.
    2. 
                                                            
  2. Choose whether to include www checks.
    3. 
                                                            
  3. Copy the OpenSSL, curl and DNS commands.
    4. 
                                                            
  4. Run the commands from a trusted terminal and compare the output with your expected certificate setup.
    5. 
                                                    

                    


                    

                        
Common mistakes

                        
    
                                                            
  • Testing only example.com while www.example.com uses a different certificate.
    • 
                                                            
  • Ignoring intermediate certificate or chain errors.
    • 
                                                            
  • Confusing CDN edge certificates with origin-server certificates.
    • 
                                                    

                    


                    

                        
FAQ

                        

                                                            

                                    Does this connect to the domain?
                                    
No. It generates commands that you run locally.

                                

                                                            

                                    Why not check the certificate directly in the browser?
                                    
Browser JavaScript cannot safely inspect full TLS certificate details. Command output is clearer and repeatable.

                                

                                                            

                                    What should I check first?
                                    
Start with expiry, issuer, SAN names and whether HTTP redirects cleanly to HTTPS.

                                

                                                    

                    


                        

        
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Last updated: May 17, 2026