Website Monitoring & Internet Diagnostics Platform
NetTests.NET combines uptime monitoring, synthetic monitoring, API monitoring, performance monitoring, and real user monitoring with 130+ free network diagnostic tools. Track website availability, replay real user journeys, schedule automated website health checks, and measure the Core Web Vitals your actual visitors experience — so you know before your users do.
Site Monitoring
Run any combination of our 130+ diagnostic tools against your sites on a schedule. Track uptime, TLS health, DNS records, email authentication, response times, and security headers — all in one place.
- ✓ Ping, traceroute, MTR — latency & packet loss
- ✓ TLS certificate expiry & chain validation
- ✓ DNS record integrity & propagation
- ✓ DMARC, SPF, DKIM email authentication
- ✓ HTTP security headers grading
- ✓ Full page load timing & resource waterfall
Report Building
Build custom reports from any set of tools, then schedule them to run automatically. Every result is stored, versioned, and delivered to the right people — automatically.
- ✓ Drag-and-drop report builder — no code needed
- ✓ Run once, hourly, daily, weekly, or custom cron
- ✓ Results delivered by email on every run
- ✓ Critical-threshold alerts via SMS
- ✓ Notifications to Slack & MS Teams channels
- ✓ Historical trend view across every run
Synthetic Monitoring
Replay the journeys that actually make you money — login, checkout, signup — step by step in a real browser, on a schedule. A 200 response doesn't prove anyone can buy anything.
- ✓ 13 step types — click, fill, assert, extract
- ✓ One session — login state persists throughout
- ✓ Full-page screenshot at the failing step
- ✓ HAR waterfall & run-to-run resource diff
- ✓ Per-step duration thresholds
- ✓ Desktop, tablet & mobile viewports
Real User Monitoring
Core Web Vitals measured on your visitors' own phones, laptops and networks — the numbers Google ranks on. One script tag, no cookies, and no visitor identifier of any kind.
- ✓ LCP, INP & CLS at the 75th percentile
- ✓ Attribution — the element responsible
- ✓ Split by page, device, country & connection
- ✓ Your visitors compared against our probe
- ✓ Core Web Vitals section in client reports
- ✓ Pooled pageviews across unlimited sites
Built for Agencies
Managing dozens or hundreds of client sites? The Agency Dashboard gives you a single pane of glass — every client site, every report, every alert — across your whole portfolio.
- ✓ Monitor an entire portfolio of client sites
- ✓ Per-client dashboards with white-label reports
- ✓ Team access with role-based permissions
- ✓ Bulk scheduling — run the same report across all clients
- ✓ Alert escalation by severity — SMS only on critical
- ✓ Slack & Teams integration per client workspace
Ready to get started?
Create a free accountNo credit card required — free plan includes 1 site and all diagnostic tools.