Catch expiring certificates and domains before your visitors do.
Self-hosted dashboard for HTTPS uptime, TLS certificate expiry and domain registration expiry, with alerts.
HTTPS availability, response time and status codes.
TLS certificate validity and days left, for every endpoint.
Registration expiry looked up through RDAP.
Email, Telegram and webhook alerts, checks every 15 minutes, and private-network blocking for outbound checks.
Certificates renew automatically until the day they don't, and domains lapse when a card on file expires. SSL & Domain Monitor watches your public endpoints and tells you early, so an expiry never becomes an outage.
Alerts go out by email, Telegram or webhook. Outbound checks block private network addresses, so the monitor cannot be used to probe your internal network.
The complete TypeScript source (Express, SQLite), Docker Compose files, a protected admin dashboard, environment examples and setup documentation.
Sample data only. Nothing you do there affects anyone else.
Anything else? Email [email protected].
Every 15 minutes by default.
Through RDAP, the modern replacement for WHOIS.
Docker Compose, or Node.js 20+ directly. Data is stored in SQLite.
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A global Microsoft 365 outage on November 12, 2026 disrupted email and collaboration tools for hours, prompting experts to advise businesses on reducing digital dependency.
Know when scheduled jobs stop running.
Live demoCapture, inspect and safely replay webhooks on your own server.
Live demoEncrypted file sharing with passwords, expiry and download limits.
Live demoTurn messy spreadsheets into clean, validated data.
Live demo
