Free HTTPS Checker

What does an HTTPS checker do?

An HTTPS checker makes a request to a website using the HTTPS protocol and reports what happened. It can show whether the server answered, which status code came back, how long the response took, whether the request followed redirects, and whether a TLS error prevented the connection.

This is different from only checking whether a domain exists. A domain can resolve in DNS while the HTTPS endpoint is down. A certificate can also exist while the application behind the secure endpoint returns an error. A useful HTTPS check sits closer to the user experience.

What this HTTPS checker verifies

This public tool checks the entered hostname over HTTPS, follows a limited redirect chain, records the final URL, captures the response time, and reports TLS or timeout errors when the request cannot complete. It classifies the result as healthy, warning, critical, or unknown based on the response and timing.

• Status code shows whether the server returned success, redirect, client error, or server error.
• Response time helps reveal slow endpoints that may need investigation.
• Redirect chain shows intermediate hops and the final destination.
• TLS error highlights certificate or handshake problems that block secure access.

How redirects work

A redirect is an HTTP response that tells the client to request a different URL. Common redirect status codes include 301, 302, 303, 307, and 308. Redirects are normal when a site moves from the bare domain to www, from HTTP to HTTPS, or from an old path to a new path. They become a problem when they point to the wrong host, create a loop, or add enough hops to slow down every visit.

Redirects also interact with certificates. If a redirect sends users to a hostname that does not have a valid certificate, the final experience can fail even though the first URL looked fine.

Common HTTPS problems

• The website only answers over HTTP and does not serve HTTPS correctly.
• A redirect sends visitors to the wrong hostname, locale, path, or parked page.
• A redirect chain is too long or loops back to a URL that was already visited.
• The server returns a 5xx status because the application, proxy, or upstream dependency is failing.
• TLS negotiation fails because the endpoint presents an invalid certificate or unsupported configuration.
• The response is technically successful but slow enough to signal a degraded experience.

The result card is designed to narrow the search. A 5xx status points toward server or application health. A redirect issue points toward routing rules, CDN configuration, or framework middleware. A TLS error points toward certificate, SNI, or load balancer configuration.

Why HTTPS monitoring matters

HTTPS failures are visible to customers, search crawlers, partner integrations, and uptime monitors. They can interrupt signups, checkout, API calls, and support workflows. The failure may be brief, but if it happens during a deployment or DNS change, someone needs to know quickly enough to roll back or fix the configuration.

Monitoring also helps catch quieter regressions. A site that still returns 200 but suddenly takes several seconds to respond may not be fully down, yet it can still hurt conversion and user trust.

How to monitor HTTPS availability automatically

Use the public checker for one-time tests during setup, migration, and troubleshooting. For production domains, automatic monitoring is better because availability changes without waiting for a manual check. Website Certs can monitor HTTPS health alongside SSL and DNS so related failures appear in one place.

After running a check, use the result CTA to start monitoring the checked domain. Anonymous visitors go to registration with the domain prefilled, while authenticated users go directly to the dashboard flow for a new domain monitor.

Related website checks

HTTPS health depends on more than one layer. Use the SSL checker to inspect certificate expiration, issuer, and hostname match. Use the DNS checker to verify records that route visitors to the endpoint. Use the Security Headers Checker to review the HTTP response headers browsers use after the HTTPS request succeeds.