HTTP vs HTTPS
HTTP and HTTPS are the same protocol for moving web pages between a browser and a server, with one difference: HTTPS wraps the connection in encryption and HTTP does not. The s stands for secure, and it is backed by an SSL/TLS certificate.
That one difference touches privacy, trust, and search rankings, which is why HTTPS has gone from optional to expected.
At a glance
| Aspect | HTTP | HTTPS |
|---|---|---|
| Encryption | None; traffic sent in plain text | Encrypted with TLS |
| Can traffic be intercepted? | Yes, readable by anyone on the path | No, contents are scrambled in transit |
| Address bar | Marked 'Not secure' in modern browsers | Padlock; no warning |
| Requires a certificate | No | Yes, an SSL/TLS certificate |
| SEO treatment | At a disadvantage; a known ranking negative | Expected; a lightweight ranking signal |
Where HTTP still appears
Plain HTTP is now the legacy case rather than a choice. You will mostly meet it on old pages that never migrated, on internal links that still point at http:// after a switch, or as mixed content where an HTTPS page loads an asset over HTTP.
Modern browsers flag HTTP pages as 'Not secure', so there is no real argument for serving a public site over plain HTTP today.
Why HTTPS is the standard
HTTPS should be the default for every public site. It encrypts traffic so logins, forms, and ordinary browsing cannot be read or tampered with in transit, and it removes the 'Not secure' warning that scares visitors off.
When you migrate, 301-redirect every HTTP URL to its HTTPS version, update internal links, and clear any mixed-content warnings so the padlock stays intact on every page.
Frequently asked questions
- Does HTTPS help SEO?
- Yes. HTTPS is a confirmed, lightweight ranking signal, and browsers flag HTTP pages as not secure, which hurts trust and conversions. Every public site should be served over HTTPS.
- What do I need to switch from HTTP to HTTPS?
- An SSL/TLS certificate, which many hosts and Let's Encrypt provide free. After installing it, redirect HTTP URLs to HTTPS with 301s, update internal links, and fix any mixed-content warnings.
- What is mixed content?
- Mixed content is an HTTPS page that loads some resources, such as images or scripts, over plain HTTP. Browsers may block those resources or downgrade the padlock, so update every asset URL to https://.
Related comparisons
See what your own site returns
Check a host's SSL certificate, its expiry, and issuer to confirm HTTPS is set up correctly.