# Uptime Check

https://rankproof.eu/tools/monitoring-uptime-check

## Short answer

Check if your website is currently accessible and measure response time.

## What It Does

Requests your URL live, follows any redirects and reports the HTTP status, response time, whether the final address is HTTPS, how many days the TLS certificate has left, and the key response headers. It is a single on-demand check — nothing is scheduled, stored or alerted.

## How It Works

1. Enter the URL you want to check
2. We request it live and follow redirects to the final address
3. Measure the status code, response time and TLS certificate expiry
4. Return a score with online, HTTPS, certificate and speed checks plus the key response headers

## Sample input + output

INPUT

```text
url: https://rankproof.eu
```

OUTPUT

```text
status:             200 (online)        OK
response time:      187 ms              OK
https:              yes                 OK
SSL certificate:    95 days remaining   OK

content-type:       text/html; charset=utf-8
cache-control:      public, max-age=300

Score: 100/100
```

## Why It Matters

When someone reports that your site is down, you need to know in seconds whether it is down for everyone. The same check warns you before a certificate expires — an expired certificate stops visitors with a browser warning and keeps crawlers away from your pages.

## Who Uses This

- **DevOps Engineer**: Confirm from outside your own network whether an outage is real or local before you escalate an incident.
- **Agency Owner**: Spot-check client sites after a hosting or DNS change and catch certificates that are close to expiry.
- **E-commerce Lead**: Check your checkout domains before a campaign launch; an expired certificate on a checkout page stops sales.

## Frequently Asked Questions

### Does it monitor my site continuously?

No. It is a one-time live check that runs when you click. For round-the-clock monitoring with alerts, use a dedicated uptime service; use this check to confirm an outage or verify a fix.

### Where is the check made from?

From our servers, not your browser, so the result reflects what an outside visitor gets rather than your local network or cache.

### What counts as online?

A final response with a status between 200 and 399. A 4xx or 5xx status, a timeout or a connection failure fails the check.

### When does the certificate check warn?

It warns at 30 days or fewer before expiry and fails at 7 days or fewer. Renew well before either threshold.

## Related Tools in Monitoring

- [Technology Stack Detector](https://rankproof.eu/tools/monitoring-technology-stack)
- [DMARC & SPF Checker](https://rankproof.eu/tools/monitoring-dmarc-checker)