Every URL starts with either http:// or https://. That small "S" has significant implications for your privacy and security online.
What Is HTTP?
HTTP (Hypertext Transfer Protocol) is the foundation of data communication on the web. It defines how browsers request pages and how servers respond. The problem: HTTP sends everything as plain text. Anyone who can intercept the connection — someone on the same Wi-Fi, your ISP, or an attacker — can read the data in full.
What Is HTTPS?
HTTPS (HTTP Secure) adds encryption via TLS (Transport Layer Security), formerly known as SSL. All communication between your browser and the server is encrypted and authenticated.
HTTPS provides three guarantees:
- Encryption: Nobody can read the traffic in transit
- Authentication: You're talking to the real server, not an impersonator
- Integrity: Data hasn't been modified in transit
How TLS Certificates Work
For HTTPS to work, a website needs a TLS certificate issued by a trusted Certificate Authority (CA). When you connect, your browser verifies the certificate and establishes an encrypted session.
Free certificates from Let's Encrypt have made HTTPS accessible to every website — there's no longer any excuse to run HTTP-only.
HTTP vs HTTPS: Direct Comparison
| Feature | HTTP | HTTPS |
|---|---|---|
| Encryption | None | TLS |
| Data visible to ISP | Yes (full content) | Only domain name |
| Man-in-the-middle attacks | Vulnerable | Protected |
| Google ranking | Disadvantage | Slight advantage |
| Browser indicator | "Not Secure" warning | Padlock icon |
| Default port | 80 | 443 |
Does HTTPS Hide Everything?
No. HTTPS encrypts the content of your communication, but your ISP can still see which domains you visit (via DNS queries). HTTPS also doesn't make a website safe — a phishing site can have a valid TLS certificate. The padlock means "encrypted connection", not "trustworthy website."
For hiding which sites you visit from your ISP, you'd need a VPN in addition to HTTPS.
Check Your Connection
Curious what information is visible about your connection? Our IP tool shows what websites can see when you connect — including your IP and provider.
Conclusion
HTTPS is the baseline for any modern website. It encrypts your data in transit, authenticates the server, and protects against interception. HTTP has no place on the modern web. But HTTPS alone isn't a complete privacy solution — it secures the connection, not your identity.