Domain Checker: DNS & SSL

Domain Checker is a local-first domain monitoring and diagnostic tool for developers, website owners, IT administrators, and network professionals.

All domains are stored and inspected locally by default. Check DNS records, SSL certificates, HTTPS availability, WHOIS data, and email security settings from one clean interface.

LOCAL-FIRST MONITORING

Local inspection is available to every user and remains the default mode.

• Checks run when you open the app or manually refresh
• Individual and batch refresh are supported
• Cloud monitoring is not required
• Domains remain local unless you choose otherwise

OPTIONAL CLOUD MONITORING

Users with an eligible paid plan can enable daily cloud monitoring for selected domains.

• Selected domains are checked automatically each day
• The app does not need to remain open
• Important changes and expiration risks can generate notifications
• Individual or multiple domains can be enabled at once
• Domains can be returned to Local mode at any time

Purchasing a paid plan does not automatically upload your domains. Only domains you explicitly enable use cloud monitoring. All other domains remain in Local mode.

The Settings screen shows your current plan, cloud quota, enabled domains, and remaining capacity.

HOME SCREEN WIDGET

The medium widget provides an overview of:

• Total domains
• Cloud-managed domains
• Local domains
• Current plan
• Overall domain health

DNS RECORD LOOKUP

Inspect common DNS records:

• A and AAAA
• CNAME
• MX
• TXT
• NS
• SOA
• CAA

Review domain resolution, name servers, mail routing, verification records, and other DNS configuration.

SSL CERTIFICATE INSPECTION

Review HTTPS certificate and TLS information:

• Certificate issuer
• Validity period and expiration countdown
• Subject Alternative Names
• Certificate fingerprint
• Public key information
• TLS handshake status

Identify expired certificates and potential configuration issues before they affect your services.

HTTP RESPONSE ANALYSIS

Check website availability and HTTP behavior:

• HTTP status codes
• Response headers
• Redirect chains
• Server information
• HTTPS reachability

WHOIS AND DOMAIN INFORMATION

Review available public registration information:

• Registrar
• Registration and expiration dates
• Domain status
• Name servers

Availability depends on information returned by the relevant registry or registration data service.

EMAIL SECURITY CHECKS

Inspect email-related DNS configuration:

• MX records
• SPF records
• DMARC records

Identify common mail routing and domain protection issues. DKIM checks require a known selector and are not performed automatically without one.

MORE FEATURES

• Add and organize multiple domains
• Run individual or batch checks
• View expiration countdowns and health indicators
• Switch eligible domains between Local and Cloud modes
• Back up and restore local data
• Export domain reports as PDF
• Optimized for iPhone and iPad

Domain Checker brings DNS, SSL, HTTPS, WHOIS, and email security information together in one focused app.

Some capabilities depend on network availability, registry data, notification permissions, cloud service availability, and the selected in-app purchase.

Terms of Use:
https://domain.opshome.run/terms/

Apple Standard EULA:
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Privacy Policy:
https://domain.opshome.run/privacy/