HTTP Version

The HTTP version shows the protocol version used to communicate between the client and server. Here’s a quick rundown of the most common ones:

v0.9 | v1.0 | v1.1 | v2 | v3

HTTP/0.9 (1991)

The first version, only supported GET requests.

HTTP/1.0 (1996)

Added headers and better support for different types of content, improving caching.

HTTP/1.1 (1997)

Brought persistent connections, chunked transfer encoding, and better caching. It’s still widely used today.

HTTP/2 (2015)

Introduced features like multiplexing, header compression, and prioritisation for faster performance.

HTTP/3 (2022)

Built on HTTP/2, but uses a new protocol (QUIC) for quicker and more secure connections.

Although HTTP/2 and HTTP/3 offer better speed and security, many systems still use HTTP/1.1 because it’s well-supported and works with most existing setups.

However, upgrading to HTTP/2 or HTTP/3 can provide significant performance and security improvements as more systems adopt them.