Launch day is not the time to discover that HTTPS is broken, email bounces, or Google is indexing your staging pages. A focused pre-launch audit catches configuration mistakes while they are still cheap to fix. This guide walks through the checks that matter most for a typical business site — and points you to free tools on sky-ai.my for each step.
Most launch failures are not code bugs. They are infrastructure gaps: a certificate that covers only the bare domain but not www, MX records still pointing at the old host after a migration, or a robots.txt file left over from development that blocks search engines entirely.
Visitors judge trust in seconds. A browser warning about an invalid certificate sends people away before they read a single headline. Customers who email you on day one and get no reply because mail routing was never updated will not come back quietly.
You do not need a full penetration test before every launch. You do need a structured pass over the layers that connect your domain to the public internet: TLS, DNS, email, crawl rules, and basic security headers. Run the checks from production — the same hostname and DNS your audience will use — not from a local dev server.
Start with the Website Health Check. It coordinates SSL, DNS, email authentication, security headers, robots.txt, and page speed in one plain-English report. That gives you a prioritized list before you drill into individual tools.
Treat the health check as your map, not your only stop. Some issues need context only you have — for example, whether a subdomain should be public or whether a specific email provider is intentional. Use the report to spot red flags, then verify each finding against your launch checklist.
Run the check twice: once with the apex domain (example.com) and once with www if you serve both. Certificate and redirect mismatches between the two are one of the most common pre-launch surprises.
Every public page should load over HTTPS without warnings. Open the SSL Checker and confirm the certificate is valid, not expired, and issued for every hostname you plan to use.
Check these specifics:
www, and any other hostnames visitors will type.http:// should 301-redirect to https://. Test both apex and www variants.If you terminate TLS at a CDN, confirm the origin certificate is also valid. A healthy edge certificate can hide a broken origin until someone bypasses the CDN.
DNS is the control plane for your domain. Use the DNS Lookup tool to inspect live records and compare them to what your hosting provider documented.
www often CNAMEs to a CDN hostname. Make sure the chain resolves and TTL values are reasonable (300–3600 seconds is typical before launch).After any DNS change, wait for propagation before declaring success. Low TTLs help during migration; you can raise them once everything is stable.
Business email is easy to break during a hosting move. The MX Validator shows whether mail exchanger records exist, resolve, and point to reachable hosts.
Go beyond MX alone. Your health check report also covers SPF, DKIM, and DMARC — the trio that keeps legitimate mail out of spam folders and stops others from spoofing your domain. At minimum before launch:
p=none).Send test messages to and from your new addresses before the press release goes out. Inbound and outbound paths are configured separately; both can fail independently.
A staging site often uses Disallow: / to stay out of Google. Forgetting to remove that rule on launch is a classic SEO self-inflicted wound. Use the Robots Checker to fetch and parse your live robots.txt.
Confirm that production rules match your intent:
Sitemap: directive points to a valid sitemap URL if you publish one.Also verify you removed noindex meta tags or X-Robots-Tag headers that developers add during QA. The robots file is only one layer of crawl control.
On the morning of launch, walk through this short list:
Schedule a follow-up audit one week after launch. DNS caches settle, certificate auto-renewal proves itself, and real traffic exposes edge cases no checklist anticipates.
Enter your production domain into the Website Health Check for a consolidated report, then use individual tools for anything that needs a closer look.
Run Website Health Check →Individual checks: SSL Checker · DNS Lookup · MX Validator · Robots Checker