HTTP Protocol Checker

Check if a website supports HTTP/2 and HTTP/3 protocols. Modern protocols mean faster, more secure connections.

How It Works

Enter Any URL

Paste any website URL. Our tool works with any publicly accessible website.

STEP 1

Real-Time Testing

We perform live protocol negotiation with the target server to detect actual support.

STEP 2

Instant Results

Get clear indicators for HTTP/1.1, HTTP/2, and HTTP/3 compatibility.

STEP 3

Why HTTP/2 and HTTP/3 Matter

Performance improvements that make a real difference

HTTP/2 revolutionized web performance by allowing multiple requests over a single connection, compressing headers, and enabling server push. It's widely supported and offers significant speed improvements over HTTP/1.1.

HTTP/3 takes it further by using QUIC (Quick UDP Internet Connections) instead of TCP. This eliminates head-of-line blocking, reduces connection setup time, and performs better on mobile and unreliable networks.

Global Protocol Usage

Real-time data from Cloudflare (Last 7 days)

Updated: Apr 7, 2026

HTTP/1.x
27.8%

Legacy protocol still in use

HTTP/2
51.3%

Most widely adopted modern protocol

HTTP/3
20.9%

Next-generation protocol, rapidly growing

HTTP/1.x

Legacy support

HTTP/2

Mature & stable

HTTP/3

Fast adoption