Paste any public URL. We’ll check if it answers, the HTTP status, and response time. Free · no signup.
Email alerts need a free Resend API key on the server.
Instant checks work now. Setup: docs/email-alerts-setup.md
Free · one email · up to 24 hours · confirm link required (no spam accounts).
How to read results
Up — the server answered (including login walls like 401/403).
Down — timeout, DNS fail, or connection refused from our checker.
A site can be “up” for us but still broken for you (region, app-only, CDN issue).
Also try: LinkCheck (phishing risk) · ScamCheck (suspicious texts) · My public IP