Know When
Your Site
Changes
or Goes Down
The only free monitoring tool that detects what changed, not just whether you're up. Uptime checks + content diff + HTML snapshots — all free.
More Than
Just Uptime
Most monitoring tools only tell you if your site is up or down. JF Monitor goes further — it detects exactly what changed on your page, alerts you when content shifts beyond your threshold, and stores HTML snapshots so you can review the difference.
HTML Snapshot History
Every time significant content changes are detected, JF Monitor captures the full HTML. Browse your snapshot history, see when changes happened, and compare versions — no other free tool does this.
How We Stack Up
Against the Rest
| Feature | JF MonitorFree — always | UptimeRobotFree plan | StatusCakeFree plan | Better UptimeFree plan | PingdomStarter $10/mo |
|---|---|---|---|---|---|
| Pricing & Company | |||||
| Free tier available | ✓ | ✓ | ✓ | ✓ | ✗ |
| Free monitor count | 10 | 50 | 10 | 10 | — |
| No ad tracking or analyticsYour data isn't used to profile or target you | ✓ | ✗ 3rd-party trackers | ✗ GA, Hotjar, Google Ads | ✗ Personalized ads | — |
| Commercial use on free planUse for business websites without a paid plan | ✓ | ✗ Personal only | ✓ | ✗ Personal only | — |
| US-based companyHeadquartered in the United States | ✓ 🇺🇸 | ✗ Malta | ✗ UK | ✗ Czech Rep. | — |
| Data stored in the USNo foreign data processing | ✓ | ✗ | ✗ | ✗ | — |
| Monitoring | |||||
| Check interval (free) | 5 min | 5 min | 5 min | 3 min | — |
| Uptime monitoring | ✓ | ✓ | ✓ | ✓ | — |
| Response time tracking | ✓ | ✓ | ✓ | ✓ | — |
| Content Monitoring — Where JF Monitor Stands Apart | |||||
| Content change detectionDetects when page content changes | ✓ | ✗ | Paid | ✗ | — |
| HTML snapshotsStores full HTML at time of change | ✓ | ✗ | ✗ | ✗ | — |
| Configurable change thresholdAlert only when change % exceeds threshold | ✓ | ✗ | ✗ | ✗ | — |
| Alerts | |||||
| Email alerts | ✓ | ✓ | ✓ | ✓ | — |
| Telegram alerts (free) | ✓ | ✗ | ✗ | Paid | — |
| Auto-recovery alerts | ✓ | ✓ | ✓ | ✓ | — |
| Reporting | |||||
| SLA reports (free) | ✓ | Basic | Basic | Paid | — |
| Incident timeline | ✓ | ✓ | ✓ | ✓ | — |
* Data based on published free-tier features as of 2026. Paid tiers may include additional capabilities.
Daily Check Logs
Every monitoring check logged — status codes, response times, change percentages. Build a complete, searchable history from day one.
SLA Uptime Reports
Monthly uptime percentages, downtime breakdowns, and incident counts. Professional-grade reliability data — free.
Everything Included.
Nothing Hidden.
Full access to every feature — no paywalls, no nag screens, no expiring trials. Monitoring the way it should be.
Full Access.
No Card Needed.
We're growing our community first. Everything is free while we build — monitor 10 sites, get every feature, keep all your history.
Create Free Account →Up and Running in Minutes
Alerts That
Reach You
Two channels, instant delivery. Know the moment something changes — before your users notice.
Start Monitoring
Today
The only free tool that monitors uptime and detects content changes. Know what changed, not just that something did.