SSL Certificate Checker

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Everyone
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About this app

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)
- Android periodic checks are supported with system scheduling
- 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.
Updated on
Mar 22, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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What’s new

v1.0.0