HTTP vs HTTPS
Compare plain web traffic with encrypted web traffic protected by TLS.
Networking
HTTP
HTTP is the standard protocol for transferring web content without encryption. It is simple and lightweight, but offers no confidentiality or integrity protection by itself.
Networking
HTTPS
HTTPS is HTTP over TLS. It encrypts traffic, protects data integrity, and validates server identity, making it the default standard for secure web communication.
Key Differences
HTTP sends traffic in plain text, while HTTPS encrypts traffic using TLS.
HTTPS protects confidentiality and integrity, while HTTP does not protect data from interception or tampering.
HTTPS validates server identity through certificates, while HTTP does not provide that trust model.
HTTP may still be used for redirects or controlled internal cases, while HTTPS is the modern default for real application traffic.
HTTPS adds cryptographic overhead, but the security benefits far outweigh the cost in most systems.
The main difference is whether traffic is protected in transit.
When to Use
When to use HTTP
Use HTTP only in limited scenarios such as internal testing, controlled non-sensitive environments, or redirecting traffic to HTTPS.
When to use HTTPS
Use HTTPS for public-facing services, user traffic, APIs, authentication flows, and any communication where privacy or trust matters.
Tradeoffs
HTTP is simpler, but insecure for normal modern production use.
HTTPS adds certificate management and TLS handling, but provides essential protection.
In practice, HTTPS is the right default almost everywhere.
Common Mistakes
Treating HTTPS as optional for public applications.
Thinking TLS only matters for login pages instead of all user traffic.
Forgetting certificate renewal and TLS configuration as part of operations.
Interview Tip
A clean short answer is: HTTP is plain text, HTTPS is encrypted HTTP over TLS.