What exactly does the Website Checker test?

We perform a real HTTP(S) request to the target from servers in EU, US and Asia. The report includes HTTP status, response time, body size, SSL certificate validity and expiry, key security headers and the redirect chain.

The site loads for me but your checker says it is down

Most likely your ISP is caching a stale DNS record while our servers see the current one. Try from mobile data or via web.archive.org — if the archive also fails, the issue is truly on the target side.

What is an "acceptable" response time?

Google considers <200 ms excellent, <600 ms acceptable. Anything above 1 second signals back-end optimization is due — caching, CDN, SQL indexes.

How often can I run the check?

We cap at 60 checks per hour per IP to prevent abuse. For continuous monitoring use UptimeRobot or a similar service.

Do you store check history?

Only in your own browser (localStorage). Nothing is persisted server-side — every check is live and forgotten immediately after the result is rendered.

Website Availability Checker

Name: Website Availability Checker - Down Detector | IPChecker Pro
Availability: InStock
Author: IPChecker Pro

Find out if a website is down or if the problem is only on your end. Check availability, SSL certificate, DNS records and response time.

Our service helps you quickly check website status and determine causes of unavailability. Perform comprehensive website check in seconds — find out operational status, response time and SSL certificate condition.

Availability monitoring includes analysis of site DNS records, server checks and network connection diagnostics. Our tool helps identify hosting issues, DNS configuration errors or temporary service disruptions.

Use professional tools for website monitoring: from simple availability checks to detailed server performance analysis and internet connection quality. Get complete information about any domain status in real-time.

What We Check

Website Availability

We check if website is working and if server responds to requests. We determine HTTP response status and web resource availability

Response Speed

We measure page load time and server response speed. We analyze hosting performance

SSL Certificate

We check SSL certificate validity and expiration date. We monitor website connection security

DNS Records

We analyze DNS records and domain name resolution. We check DNS server configuration correctness

Server Geolocation

We determine server location and hosting provider. We analyze infrastructure geographical placement

HTTP Headers

We analyze HTTP headers and technical server response details. We diagnose web server configuration

How to check if a website is up

Enter the address — the domain (example.com) or full URL with https:// — the checker understands both.
Run the check — within 3 seconds we fire HEAD + GET requests from servers in Europe, Asia and the US so you see the site from multiple regions.
Read the report — response time, HTTP status (200/301/500…), SSL certificate expiration, key security headers and the redirect chain.
Save to history — the result is kept in your browser's localStorage so you can diff measurements before/after server changes.

Example use cases

Monitoring your own site

Verify uptime before an ad campaign — if the server answers >3 s or returns 5xx, every paid click is wasted.

"It does not load" from a client

Quickly confirm whether the site is actually down or just down for them. Our checker looks from outside — an objective view.

SSL a week before expiry

An expired cert kills conversions — every browser shows a red interstitial. Check at least monthly.

Benchmark against competitors

What's a competitor's typical response time? If you're at 800 ms and they're at 200 ms, that's a backend-optimization case to make.

Common mistakes & fixes

Site loads for me but the checker says down: Your ISP may cache a stale DNS record. Flush your local DNS (ipconfig /flushdns on Windows) or try from mobile data — if it also fails, the site is truly unreachable externally.
Status 301/302 instead of 200: That's not an error — your server is redirecting (to https, www, or another path). Check the chain: any hop >400 ms is needless delay for users.
SSL reported invalid but browser is fine: You likely missed the intermediate-certificate chain. Browsers often have the intermediate cached, our checker does not. Install the full chain on your server.