What is HTTP/2?

HTTP/2 is a modernized internet protocol that makes websites load up to 3x faster than with HTTP/1.1. Thanks to advanced technologies such as multiplexing, header compression and server push, data is sent more efficiently and faster.

But why is HTTP/2 such a game changer for your website? Let's find out.

The problems with HTTP/1.1

HTTP/1.1 has been around since 1997 and was the standard for a long time. But as websites grew (more images, scripts and dynamic content), it became slower and slower. Some drawbacks of HTTP/1.1:

❌ Every request is processed separately, which causes waiting times.
❌ Headers are not compressed, so far more data is sent than necessary.
❌ Many open connections are needed, which overloads the server.

HTTP/2 solves these problems and delivers a lightning-fast internet experience.

The 4 biggest advantages of HTTP/2

1️⃣ Multiplexing: multiple requests at once 🚀

With HTTP/1.1, requests are processed one at a time. HTTP/2 makes this a thing of the past with multiplexing, which sends multiple requests simultaneously over a single connection. This speeds up loading time enormously.

🔍 Example:
Say your website has 50 elements (images, scripts, stylesheets).

  • HTTP/1.1 processes them one by one. 📉
  • HTTP/2 loads them all at once. 📈

✅ Result: Faster pages, a better user experience and higher conversion!

2️⃣ Header compression (HPACK): sending less data 🎯

With HTTP/1.1, headers are sent again with every request. This is inefficient. HTTP/2 uses HPACK compression, which shrinks headers so that 30-50% less data is sent.

✅ Result: Lower server load and faster loading times.

3️⃣ Server Push: loading files in advance 📡

Normally a browser only requests a file when it needs it. HTTP/2 can send it to the browser in advance, without the user asking for it.

🔍 Example:

  • HTTP/1.1: The browser first requests the HTML, then the CSS, then the JavaScript.
  • HTTP/2: The server sends the CSS and JavaScript along right away.

✅ Result: Instant loading without delay!

4️⃣ Binary structure: faster processing ⚡

HTTP/2 no longer works with text like HTTP/1.1, but with binary data. Computers understand binary code much faster, which makes communication between browser and server more efficient.

✅ Result: Less latency and higher speed.

How much faster is HTTP/2 in practice? 🔥

At Theory7 we ran a test to measure the difference between HTTP/1.1 and HTTP/2. The results:

Test HTTP/1.1 HTTP/2
Time to first byte 300 ms 150 ms ⬇️ 50% faster
Full page load 2.5 sec 1.2 sec ⬇️ 52% faster
Data transfer 1.2 MB 800 KB ⬇️ 33% less data

✅ Conclusion: On average, HTTP/2 loads 30-50% faster than HTTP/1.1!

👉 Test your own website with a free speed test and see the difference right away.

HTTP/2 vs HTTP/3: what is the difference?

HTTP/2 is already fast, but HTTP/3 goes one step further. The most important upgrade? HTTP/3 uses QUIC instead of TCP, which makes connections more stable and faster, especially on mobile networks.

🔍 Key differences:

Feature HTTP/2 HTTP/3
Protocol TCP QUIC
Connections Better efficiency Faster reconnections
Mobile performance Good Excellent 📱

HTTP/3 is the future, but HTTP/2 is already a must-have for fast websites today!

HTTP/2 at Theory7: enabled by default 🚀

At Theory7 you don't have to do anything to benefit from HTTP/2. All our hosting plans, including:

✅ Web hosting with HTTP/2
✅ WordPress hosting with HTTP/2
✅ Dedicated servers with HTTP/2

come with HTTP/2 by default for the fastest loading times and best performance.

HTTP/2 is a no-brainer

HTTP/2 delivers a faster, more efficient and better web experience. With features such as multiplexing, header compression and server push, your website loads up to 3x faster.

Do you also want to benefit from lightning-fast loading times and better SEO?

🔹 Switch to Theory7 and get FREE HTTP/2 with all our hosting plans! 🔹

👉 Check out our fast web hosting and experience it for yourself! 🚀