Free Website Uptime Monitoring
RankNibbler's free uptime monitoring watches your website around the clock and emails you the second it stops responding — so you fix outages before your visitors, or Google, ever notice. Create a free account and keep an eye on as many sites as you like.
Free account · Unlimited monitors · Email alerts · SSL & response-time checks
What is uptime monitoring?
Uptime monitoring is repeatedly checking that your website responds the way it should. A monitor requests your page every minute or so; if it returns an error, times out, or won't load, that's logged as downtime. Monitoring your site's downtime like this is how you find out it's down before a customer emails to tell you.
Why uptime matters for SEO
Search engines can't crawl a site that won't load. The odd blip is fine — Googlebot retries — but repeated or prolonged downtime means missed crawls, and a site that's regularly unreachable can slip in the rankings or, at worst, drop out of the index. Downtime also quietly costs you the trust and revenue you've spent months building. Spotting it early is the cheapest insurance there is, which is why we built free uptime monitoring alongside our full site audit.
How it works
Add your URL
Point us at your homepage, or any page you want kept an eye on.
We check it on a schedule
We request the page, read the status code and response time, and confirm the SSL certificate is still valid.
You get alerted
The moment a check fails, we email you what went wrong — a 500 error, a timeout, an expired certificate — so you can act fast.
What good uptime looks like
“Three nines” — 99.9% uptime — is the usual target. It sounds airtight until you read it as time your site was actually offline:
| Uptime | Downtime / year | Downtime / month |
|---|---|---|
| 99% | 3.65 days | 7.3 hours |
| 99.9% | 8.8 hours | 43 minutes |
| 99.99% | 52 minutes | 4.3 minutes |
| 99.999% | 5 minutes | 26 seconds |
Even a respectable 99.9% leaves nearly nine hours a year. A slow page can hurt too — if your monitor flags creeping response times, our guide on reducing page load time and the basics of Core Web Vitals are the places to start.
Frequently asked questions
Is RankNibbler's uptime monitoring really free?
Yes — create a free account and monitor as many sites as you like, no credit card. Most tools cap the number of free monitors or lock alerts behind a plan; ours doesn't.
How do I check if my website is up right now?
Create a free account and add your site — RankNibbler works as a free website uptime checker, showing its status and response time and emailing you if it ever goes down.
How often should you check uptime?
Every minute for business-critical sites; every five minutes is plenty for most.
Why is my website showing as down?
Usually a server error (a 5xx response), a timeout, a DNS issue, or an expired SSL certificate — you can confirm the last one with our HTTPS & SSL checker. A broken redirect chain can also make a healthy site look unreachable.
Does website downtime hurt SEO?
A short blip won't — search engines retry. But repeated or long outages cost you crawls, rankings, and eventually indexing.
What's the difference between uptime monitoring and a status page?
Monitoring detects downtime and tells you; a status page communicates it to your users. The first is what keeps you in the loop.
Monitor unlimited sites, free
Create a free account and we'll watch every site you add, alerting you the moment one goes down. No credit card, nothing to install.