What Is HTTP/3 and How Do I Enable It?

What Is HTTP/3 and How Do I Enable It?

HTTP/3 is the latest evolution of the Hypertext Transfer Protocol, designed to deliver faster, more secure, and more reliable connections across the modern web. Unlike HTTP/1.1 and HTTP/2, which rely on TCP, HTTP/3 is built on QUIC, a UDP‑based transport protocol optimized for speed and stability.

For proxy users, especially those who rely on high‑performance residential routes, HTTP/3 can significantly improve connection quality and reduce latency.

Why HTTP/3 Matters for Proxy Users

• Faster connection setup thanks to QUIC’s reduced handshake time
• Better performance on unstable or mobile networks, which is common when routing globally
• Built‑in TLS 1.3 encryption, improving security without extra overhead
• No head‑of‑line blocking, allowing multiple requests to run smoothly

These benefits make HTTP/3 a major upgrade for scraping, automation, browsing, and API‑heavy workloads.

How HTTP/3 Works With 39Proxy

At 39Proxy, HTTP/3 is automatically supported when you use our SOCKS5 residential per‑GB proxies. Here’s how:

1. SOCKS5 With Full UDP Support

HTTP/3 requires UDP because QUIC runs over UDP.
Our SOCKS5 network fully supports UDP tunneling, allowing QUIC traffic to pass through without restrictions.

2. Residential IP Routing

Your traffic is routed through real residential IPs, improving compatibility with websites that support HTTP/3 and reducing the chance of blocks or throttling.

3. Automatic Enablement

There is no configuration required.
If your target website supports HTTP/3, your connection through 39Proxy will automatically upgrade to it.

4. Per‑GB Billing Efficiency

Because our residential plan charges per gigabyte, you only pay for the traffic you use — making HTTP/3’s efficiency even more valuable.