How to Check If a Website Is Down: A Practical Step-by-Step Guide

The quickest first check is to open an incognito or private browsing window and navigate to the URL. Using a private window prevents your browser's cache from returning a stored version of the page that may not reflect the current server state. If the site loads correctly in a private window, the issue may be local browser cache or a cached error state rather than a real server problem.

Look for more than just whether the page loads. Note the URL in the address bar after the page loads — if the browser redirected to a different URL, this may be intentional or may indicate a configuration issue. Look at the padlock icon in the address bar — a warning symbol or an unlocked padlock indicates HTTPS is not working correctly. Note how long the page takes to load — a blank screen for several seconds before content appears is a response time issue even if the page eventually loads.

If the page does not load at all, note the error message: 'ERR_NAME_NOT_RESOLVED' indicates a DNS issue. 'ERR_CONNECTION_REFUSED' indicates the server is not accepting connections. 'ERR_CONNECTION_TIMED_OUT' indicates the server is not responding. Each of these points to a different underlying problem.

If a site does not load from your browser, confirm that the problem is not specific to your local network. Try loading the site on a phone using mobile data (not WiFi), or ask someone on a different network to check. If the site loads on a different network but not yours, the problem is a local network or DNS issue rather than a server problem.

This step is particularly important for agencies checking client sites remotely. Your office network, VPN, or ISP may have DNS caching, content filtering, or routing behavior that differs from what a typical visitor experiences. A site that loads fine from your office may be inaccessible from a visitor's home network, or vice versa.

An external website health check — a check run from a server outside your local network — gives you the most objective view of what a typical visitor experiences. This is different from your browser test, which uses your local network conditions.

If the site loads but shows a browser warning about an insecure connection, the most likely cause is an expired or invalid SSL certificate. In Chrome, click the padlock icon (or warning icon) in the address bar, then click 'Certificate' to see the certificate details including the expiry date. In Firefox, click the lock icon, then 'Connection Secure,' then 'More Information.'

An expired certificate causes a full-screen browser warning rather than a padlock warning — in this case, you may not reach the page at all. If you see 'Your connection is not private' or 'Warning: Potential Security Risk,' the SSL certificate is the likely cause.

A certificate warning does not always mean the certificate has expired. It can also mean the certificate was issued for a different hostname, the certificate chain is incomplete, or the certificate authority is not trusted. The certificate details panel in the browser will give you the specific issue.

Your browser test tells you whether the site loaded from your computer. An external website health check tells you what a visitor actually experiences, tested from outside your local environment. It also surfaces signals your browser does not display: the exact SSL certificate expiry date, server response time in milliseconds, specific security headers in the response, HTTP status codes, and domain risk notes.

An external check is particularly useful when: the site seems to work from your browser but visitors are reporting problems, you want to verify SSL certificate details without manually inspecting the certificate, you want to check the site's response time from outside your network, or you want a complete picture of site health rather than just whether it loads.

MonitorMojo runs this kind of combined external health check. Enter the domain, run the check, and see reachability, SSL status and expiry, response time, security headers, and domain risk signals in one result — giving you more information than a manual browser check in less time.

If the external check confirms the site is down or degraded, check for the common causes in order of frequency. First, check whether the SSL certificate has expired — this is the most common cause of unexpected HTTPS failures. Second, check the hosting provider's status page for any active incidents that might explain unavailability. Third, verify that DNS is resolving correctly — nslookup or a DNS lookup tool will show whether the domain resolves to the expected IP address.

If none of these explain the problem, check for recent changes to the site: plugin updates, hosting migrations, content changes, or configuration modifications that might have introduced the issue. Changes made within the 24 hours before the failure are a natural starting point for investigation.

If you manage the site, check the server error logs for any recent error entries that might indicate what caused the failure. If you do not have server access, contact the hosting provider's support team with the specific symptoms — the HTTP status code, the error message, and when the issue started.

After resolving the issue, run a final health check to confirm the site is fully functional: reachable, returning a 200 status code, with HTTPS active and the SSL certificate valid, and with response time back within normal range. This confirms the resolution is complete rather than partially fixed.

Document the timeline: when the issue was first detected, what investigation found, what was done to resolve it, and when the site was fully restored. This documentation is useful for client communication and for identifying patterns if similar issues occur again.

If the issue was something preventable — an SSL certificate that had been approaching expiry, a plugin update that introduced a conflict — note the preventive action that would have avoided it and add that to your monitoring workflow for future checks.

How to Check If a Website Is Down: A Practical Step-by-Step Guide is best understood as a repeatable website health workflow, not a promise that every outage or configuration issue will be avoided. Learn how to check if a website is down — from quick browser tests to external health checks that reveal SSL issues, response errors, and domain problems your browser hides.

In practice, this workflow centers on uptime, SSL certificates, response time, security headers, website health summaries, and monthly review notes. Each check is planning input: it can show that the site is reachable, that a certificate has a given expiry window, that response time has shifted, or that a header is missing. It cannot prove root cause by itself or replace a human response. The value is in making the review consistent enough that site owners and small teams can spot issues before someone downstream has to ask about them.

This is most useful for site owners and small teams. The common thread is a small team doing a routine check before something breaks in front of a visitor, where a missed signal costs more than the few minutes it takes to check.

Beyond that primary audience, the same checks are reusable by anyone with a public-facing URL that matters to revenue, leads, or reputation: a recurring review is cheap insurance compared to hearing about the problem from a client or customer first.

Start by listing the URLs that actually matter instead of just the homepage — for a small team doing a routine check before something breaks in front of a visitor, that usually means the pages tied to revenue, signups, or trust, not every page on the site.

Next, define the check types for each URL: reachability, HTTP status, HTTPS/SSL certificate status and expiry window, response time, redirect behavior, and security header presence. For API, CLI, and AI-agent workflows, document which endpoint or command runs the check and where the result is stored.

Set a cadence that matches the risk — a low-traffic page may only need a monthly look, while a page tied to revenue or signups deserves a check after every deployment and before any campaign or launch.

Record what you find with a consistent format: URL, check type, status, issue, owner, detected date, and next review date. Then say what actually happened in plain language — a check can surface a symptom, but site owners and small teams still need to confirm the cause.

• Choose the URLs that matter most to visitors, clients, revenue, and operations.
• Run uptime, SSL, response time, and security header checks on a consistent schedule.
• Triage failed or risky checks by likely owner: hosting, DNS, SSL, code, platform, or third party.
• Record notes in a repeatable format so future reviews do not start from scratch.
• Send a plain-language summary with the issue, impact, owner, and next review date.
• Run a confirmation check after remediation so there is an external result to reference.

Use this template for recurring reviews: [URL], [Check Type], [Status], [Issue], [Priority], [Owner], [Detected Date], [Resolved Date], [Next Review Date]. Add a one-line summary at the top: what changed, what needs attention, and who owns the next step.

For site owners and small teams, group findings into the four signals that matter most: reachability, SSL status, response time, and security headers. Where nothing needs action, say the check found no issue in that area rather than implying full coverage.

• [URL]: the exact page or endpoint checked.
• [Check Type]: uptime, SSL, response time, headers, API, CLI, or agent workflow.
• [Status]: pass, review, failed, blocked, or needs human investigation.
• [Issue]: the observable symptom, not an unsupported root-cause claim.
• [Owner]: agency, developer, host, DNS provider, client, or third-party vendor.
• [Next Review Date]: when the team should confirm status again.

The most common mistake is monitoring only the homepage while a checkout, signup, or booking flow silently breaks. Another is assuming SSL auto-renewal always works — it can fail quietly, and an external check is the only way to catch that before a browser warning does.

For site owners and small teams specifically, the recurring miss is treating one clean check as proof the whole site is fine, or fixing an issue without ever writing down what happened — which means the next person repeats the same investigation from zero.

• Tracking too many low-value URLs while missing the ones that matter.
• Skipping notes after an issue is resolved.
• Reporting a status without an owner or next step attached.
• Assuming automation can resolve an incident without human review.
• Treating one clean check as proof that every risk is covered.

Consider a small team doing a routine check before something breaks in front of a visitor. A scheduled check flags that the site is slower than its usual baseline and that a security header is missing. Instead of guessing, the team logs the observation with a timestamp, assigns an owner, and re-checks after the fix ships — turning a vague "something feels off" into a specific, closed-loop task.

MonitorMojo runs website health checks that combine reachability, SSL certificate status, response time, and security header presence in one workspace, so this workflow doesn't require stitching together several separate tools.

The API and CLI make the same checks scriptable for site owners and small teams who want them wired into an existing process, while credit-based checks keep it practical to run reviews exactly when they matter — before a client call, after a deploy, or when someone asks whether the site is healthy. Results still depend on hosting, DNS, and how quickly the responsible team acts on what the check finds.