What is 6-layer website monitoring?

Visual Sentinel monitors 6 layers: Uptime (is your site reachable), Performance (Core Web Vitals), SSL (certificate expiry and chain issues), DNS (record changes and hijacking), Visual (pixel-level screenshot comparison), and Content (text and markup change tracking). Most monitoring tools only check uptime.

How is Visual Sentinel different from Pingdom or UptimeRobot?

Pingdom and UptimeRobot primarily check if your server responds. Visual Sentinel adds visual regression detection, SSL certificate monitoring, DNS change tracking, and Core Web Vitals — catching problems that return HTTP 200 OK but show a broken page to visitors.

Do I need to install anything?

No. Visual Sentinel monitors externally — just paste your URL. No code changes, no agents, no browser extensions required. Setup takes under 60 seconds.

How fast are the alerts?

Alerts are delivered within minutes of detection via your choice of Email, Slack, Discord, WhatsApp, Telegram, or custom webhooks. Each alert includes screenshots and diagnostic data.

Is there a free plan?

Yes. The free plan includes 1 monitor with all 5 monitoring layers enabled. No credit card required. Paid plans start at $9/month for additional monitors and features.

What notification channels are supported?

Visual Sentinel supports Email, Slack, Discord, WhatsApp, Telegram, and custom webhooks. You can configure multiple channels per monitor so your entire team stays informed.

Check Your SSL Certificate

Enter any domain to check its SSL certificate status, expiry date, and chain validity. Free, no signup.

Certificate Details

See issuer, expiry date, key size, algorithm, and subject alternative names.

Expiry Warnings

Instantly see if your certificate is expiring soon or has already expired.

No Signup Needed

Check unlimited domains for free. No account or credit card required.

Need Continuous SSL Monitoring?

Get alerts before your SSL certificate expires. We check daily and warn you 30 days in advance.

Learn about SSL monitoring