Certificates & Site Ops
HTTPS Migration Basics for Small Sites
Move a small site from HTTP to HTTPS with a practical checklist for certificates, redirects, mixed content, canonicals, cookies, testing, and renewal.
In brief
What it is: A sound HTTPS migration is more than getting a certificate; it also covers redirects, mixed content, cookies, and renewal hygiene.
Why it matters: Small sites avoid repeat outages when they treat HTTPS as a durable operational change instead of a one-time install.
Worth knowing: Complete the migration by checking redirects, mixed content, canonical URLs, security headers, and representative routes.
Moving a small site to HTTPS is one of the highest-value infrastructure upgrades you can make, but it touches more than the certificate itself. Redirects, mixed content, internal links, deployment paths, and renewal all need to line up for the migration to stay clean.
The easiest way to reduce surprises is to treat HTTPS migration as a checklist rather than a single certificate task.
What to plan besides the certificate
- Certificate issuance and renewal are only the start.
- Redirect behavior, canonical URLs, and internal references need consistency after migration.
- Test the live site after deployment, not just the server configuration.
Run through this checklist
- Generate or document the initial certificate command and validation method.
- Update server redirects so HTTP requests move cleanly to HTTPS.
- Review internal links, assets, and templates for protocol-specific references.
- Confirm that the live site serves the correct certificate and content after the change.
Checks people skip
- Treating HTTPS migration as finished the moment the certificate file exists.
- Forgetting to update hard-coded internal asset links.
- Leaving renewal undocumented after a successful first deployment.
Questions that come up in review
Do I need a wildcard certificate to move to HTTPS?
Most small sites do not.
Is HTTPS migration only an SEO task?
It is also a security, trust, and operational reliability task.
Do this locally (CLI)
Use these commands when you want to confirm the site responds over HTTPS and when the current certificate expires.
curl -I https://example.com
openssl s_client -connect example.com:443 -servername example.com </dev/null 2>/dev/null | openssl x509 -noout -subject -issuer -enddate
Worth knowing: A curl -I response can be reviewed with the Security Headers Inspector. Sample representative routes and times for broader coverage.
- The redirect, certificate, and content checks belong to the same migration story.
- A certificate can be valid while mixed content or redirect rules still make the migration incomplete.
