How to Check if Your Website is Secure (HTTPS Audit Guide)
Use this step-by-step HTTPS audit guide to review certificates, redirects, security headers, and browser trust signals without needing a long enterprise checklist.
Step 1: Confirm the certificate is valid
The first step in any website security audit is verifying the certificate your server is presenting right now. You want to confirm the certificate is active, not expired, issued for the correct hostname, and served with a valid chain. If any of those basics are wrong, browsers may show trust warnings before a visitor ever reaches your content.
This is the right place to use an external tool instead of relying only on your hosting dashboard. A dashboard can tell you what should be installed. A live HTTPS scan tells you what the outside world is actually receiving. That difference matters after certificate renewals, CDN changes, proxy updates, or domain moves.
Step 2: Review redirects and HTTPS enforcement
Next, test how the site handles plain HTTP traffic. A secure setup should redirect visitors from `http://` to `https://` quickly and consistently. If the redirect chain is messy, slow, or missing entirely, some users and crawlers may still hit insecure URLs. That creates avoidable confusion and can weaken your canonical setup for search engines as well.
You should also check whether HSTS is present. HSTS tells modern browsers to prefer HTTPS automatically on future visits, which reduces downgrade risk and accidental insecure requests. It is not a replacement for a proper redirect, but it is an important extra layer in a strong HTTPS configuration.
Step 3: Audit browser-facing protections
Once the connection path is clean, move on to the headers the browser uses for safety decisions. Review Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and related settings. This is where many sites have the biggest gap between “technically on HTTPS” and “actually hardened enough for production use.”
A good website security audit should also look for consistency. For example, if your homepage sends one set of headers and app pages send another, you may have an incomplete edge or reverse-proxy configuration. Scanning the live site with the same tool each time makes those differences easier to spot than checking scattered config files by hand.
Step 4: Recheck after every meaningful change
Security reviews are not one-and-done tasks. Re-run your audit after certificate renewals, infrastructure changes, CDN migrations, framework upgrades, or new third-party scripts. Those are the moments when HTTPS regressions often appear. A previously healthy site can begin serving the wrong certificate or lose a critical header without anyone noticing for days.
If you want a fast baseline, use Https Co as your free audit tool. Enter the domain, review the certificate, redirect, and header results, and keep the report as a before-and-after checkpoint whenever you make changes. That simple habit is one of the easiest ways to check website security without turning a basic HTTPS review into a heavyweight project.
Run a free website security audit
Use the checker as a quick HTTPS audit baseline whenever you change hosting, renew certificates, or want to verify the protections a browser sees.