About Us — SSL Checker Tool

Our Mission

SSL Checker Tool exists to make professional SSL/TLS diagnostics accessible to everyone — completely free, with no registration required. We believe that every website owner, system administrator, and developer should have access to the same quality of certificate analysis tools used by enterprise security teams.

From verifying a single certificate installation to scanning for deep TLS vulnerabilities, our tools are designed to surface clear, actionable information fast — so you can spend less time diagnosing and more time building.

Our Tools

We offer 13 free SSL/TLS tools covering the full certificate lifecycle — from generation and validation to conversion and security auditing:

• SSL Checker — Verify certificate installation and expiration
• Bulk SSL Checker — Monitor up to 100 domains at once
• TLS Scanner — Deep vulnerability scan (POODLE, Heartbleed, weak ciphers)
• Certificate Decoder — Decode X.509 certificates
• CSR Decoder — Inspect Certificate Signing Requests
• CSR Generator — Generate RSA and ECC CSRs
• SSL Converter — Convert PEM, PFX, DER, P7B formats
• Certificate Search — Search CT logs for any domain
• DNS Lookup — A, MX, NS, TXT, CNAME, CAA records
• Key Matcher — Match private keys to certificates
• Mail SSL Checker — Test SMTP, IMAP, and POP3 SSL
• Redirect Checker — Trace URL redirect chains
• Vulnerability Checker — Audit security headers

Our Expertise

SSL Checker Tool is maintained by a team with hands-on experience in web security, public key infrastructure (PKI), and DevOps operations. Our tools are trusted daily by:

System administrators managing certificate renewals across large server fleets. DevOps engineers integrating SSL validation into CI/CD pipelines. Security auditors assessing TLS configurations for compliance. Web developers diagnosing mixed-content warnings and certificate chain errors.

Privacy & Data Handling

We take privacy seriously. Domain names and certificates entered into our tools are processed only for the purpose of returning results to you. We do not store, share, or sell any certificate or domain data submitted through our tools.

All certificate conversion and CSR generation happens securely. Private keys are never transmitted to our servers — they are handled entirely in your browser.

Contact Us

Have a question, found a bug, or want to suggest a new tool? We'd love to hear from you.