Oh Dear

Oh Dear monitors your website's health beyond simple uptime—it checks SSL certificate expiry, broken links, mixed content, and scheduled cron jobs. All checks run from multiple global locations, so you know if your site is down for users in Europe or Asia.

What it does

You add a site URL, and Oh Dear runs periodic checks: HTTP status, SSL validity, DNS records, and link scanning. It sends alerts via email, Slack, or webhooks when something fails, with detailed reports on what broke.

Best for

• Developers managing multiple client sites
• Agencies needing automated uptime and SSL monitoring
• Site owners who want proactive alerts before visitors notice issues

Strengths

• Checks from 6+ global locations for real-world uptime data
• Broken link scanner catches 404s and redirect chains
• SSL monitoring with expiry warnings 30 days out

• Uptime monitoring — HTTP/HTTPS checks from multiple locations every minute
• SSL certificate check — Alerts on expiry, misconfiguration, or chain issues
• Broken link scanner — Crawls your site for 404s and redirect loops
• Cron job monitoring — Verify scheduled tasks run on time
• Mixed content scan — Detect HTTP resources on HTTPS pages
• Status page — Public page showing current site health