Get instant notifications when your website goes down. Track uptime, response times, SSL certificates and performance metrics in real-time.
No credit card required · 5 monitors free forever · Setup in 30 seconds
Start monitoring in three simple steps
Enter your website URL and choose monitoring type (HTTP, HTTPS, Ping, Port). Set check interval from 1 to 60 minutes.
Choose how you want to be notified: Email, Slack, Discord, PagerDuty, Telegram, or Webhook. Set up multiple notification channels for critical sites.
We'll monitor your site 24/7 and alert you instantly if something goes wrong. View detailed reports in your dashboard.
Everything you need to keep your websites online and performing well
Monitor HTTP, HTTPS, TCP ports, ping, and DNS. Check status codes, response times, and content verification.
Get alerted via Email, Slack, Discord, PagerDuty, Opsgenie, Telegram, or Webhook. Receive alerts when sites go down and when they recover.
Track response times, uptime percentage, and performance trends. Identify slow pages and optimize your infrastructure.
Monitor SSL certificate expiration dates. Get notified before certificates expire to avoid security warnings.
Track all downtime incidents with detailed logs. View incident duration, affected monitors, and root cause analysis.
Create beautiful public status pages for your users. Keep them informed about system status and scheduled maintenance.
Choose the right monitoring method for every service you run
Monitor website availability, status codes, response times, and page content.
Verify expected text is present on the page, with contains, exact or regex matching.
Check that specific ports are open and accepting connections — FTP, SSH, SMTP and more.
Monitor server availability and network latency with ICMP ping checks.
Verify DNS records and resolution times to ensure proper domain configuration.
Watch cron jobs and background tasks — if the expected ping stops arriving, you are alerted.
Run multi-step journeys such as login or checkout, and confirm every step still works.
Check as often as every minute from multiple regions. Our distributed agent network spots an outage wherever it happens and alerts you the moment it is confirmed.
Our monitoring infrastructure is built for reliability. We monitor the monitors, ensuring our service is always available when you need it.
An outage has to be confirmed by consecutive failed checks before anyone is paged, so a single transient blip never wakes you up at 3am.
Integrate with Slack, PagerDuty, Discord, Telegram and more. Use webhooks to connect with any custom system or workflow.
Whether you're a developer, agency, or enterprise, we've got you covered
Monitor your MVP and ensure uptime for early adopters. Start free and scale as you grow.
Monitor all your client websites from one dashboard. Provide uptime reports and SLA compliance.
Monitor critical infrastructure with custom SLAs, team collaboration, and priority support.
Every minute of downtime costs sales. Get instant alerts to minimise revenue loss.
See what our customers say about us
“SiteIsOnline has been a game-changer for our business. We get instant alerts and can fix issues before our customers even notice.”
“The best monitoring service I've used. Simple setup, reliable alerts, and excellent support. Highly recommended!”
“We monitor 50+ client websites. The reporting features and status pages are exactly what we needed for transparency.”
Join thousands of users who trust SiteIsOnline to keep their websites running smoothly. Start free, no credit card required.