SSL Certificate Checker

SSL Certificate Checker helps you monitor SSL/TLS certificate health for the websites and services you care about.

Add one or more targets (hostname + port, default 443), run a check instantly, or scan your whole list in one tap. The app is designed for a quick daily workflow: open, scan, review risk, and act.

What you can check:

• Expiry date and days left
• Status classification: OK, Expiring, Expired, Failed
• Issuer and subject
• SAN (Subject Alternative Name)
• Serial number and signature details
• SHA-256 certificate fingerprint
• SHA-256 public key fingerprint
• Negotiated TLS protocol and cipher suite

Key workflows:

• Single target check for immediate troubleshooting
• Full list scan for regular maintenance
• Saved targets and latest results stored locally on device
• Optional periodic background checks (can be turned on/off)

Built for practical certificate operations:

• Quickly identify certificates close to expiration
• Compare protocol/cipher negotiation outcomes
• Keep a simple watchlist for internal or public endpoints
• Generate and review report-style outputs inside the app

Security perspective for connected-device teams:

• Includes TLS protocol and cipher suite visibility to support baseline security reviews
• Helps teams spot weak or unexpected negotiated ciphers during routine checks
• Useful as an evidence aid for internal security discussions and release readiness
• Designed as a practical checker, not a complete legal/compliance assessment tool

Regulatory context note:

• In the EU, RED cybersecurity delegated requirements under Directive 2014/53/EU Article 3(3)(d)(e)(f) apply from August 1, 2025 for covered products
• This app can support early HTTPS/TLS posture checks, but it does not certify compliance with RED-DA, EN 18031, or any other regulation/standard on its own

Privacy and control:

• No account is required to start checking
• Targets and recent check results are kept locally for your routine usage
• Privacy policy and terms are available from within the app

Current release focus:

• Core SSL/TLS checking flow and result parsing are available
• Batch checking and retry flow are available
• iOS background checks are best-effort (system-scheduled)
• Multilingual UI foundation is integrated; some languages are still being refined

This app is suitable for developers, operators, site owners, and anyone who wants a simple way to track certificate validity and TLS configuration from a mobile device.