HTTP/3

HTTP/3 is the latest version of the Hypertext Transfer Protocol, the foundation for data communication on the World Wide Web. It improves upon HTTP/2 by replacing the Transmission Control Protocol (TCP) with the faster and more efficient QUIC protocol, which uses User Datagram Protocol (UDP) to resolve network congestion and reduce latency. This results in quicker loading times for web pages and better performance for web applications. HTTP/3 provides enhanced security, as encrypted communication is integral to the QUIC protocol, preventing information exposure and protecting against third-party interference. It is gradually being adopted across modern browsers and websites.

7,315

websites using HTTP/3

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Websites using HTTP/3 by countrymarket share · top 8 countries

🇩🇪Germany

16%

🇮🇳India

15%

🇬🇧United Kingdom

7.6%

🇦🇺Australia

5.9%

🇮🇩Indonesia

2.9%

🇨🇦Canada

2.4%

🇷🇴Romania

🇳🇱Netherlands

1.9%

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Websites using HTTP/3 by industrydetected industries

Shopping73%

SaaS & Cloud26%

Education0.2%

Travel0.1%

Law & Government0.1%

Aerospace & Defense0.1%

Websites using HTTP/3

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Frequently asked

What is HTTP/3?›

HTTP/3 is the third and latest major version of the Hypertext Transfer Protocol (HTTP), which is used to transmit data and facilitate communication between web servers and clients (users' browsers). It is built on top of the QUIC protocol, which uses User Datagram Protocol (UDP) instead of Transmission Control Protocol (TCP) for faster and more reliable operations.

How does HTTP/3 improve upon HTTP/2?›

HTTP/3 offers performance enhancements over HTTP/2 by using the QUIC protocol, reducing latency with faster connection establishment, and supporting more robust connection migration. This allows for quicker and more resilient interactions between servers and clients, especially in areas with low-quality internet connections or high packet loss.

Will my website automatically upgrade to HTTP/3?›

For your website to use HTTP/3, both the web server and users' browsers must support the protocol. Most modern web platforms, like Nginx and Apache, have begun to incorporate HTTP/3 support. Additionally, popular browsers such as Google Chrome and Mozilla Firefox have implemented or are in the process of implementing HTTP/3 support. To fully utilize HTTP/3, you may need to make some configuration changes on your web server.

Is HTTP/3 backward compatible with HTTP/1.x and HTTP/2?›

Yes, HTTP/3 is designed to be backward compatible with previous versions of HTTP. If a client or server does not support HTTP/3, they can automatically fall back to using HTTP/2 or HTTP/1.x, depending on what both parties support. This ensures that web services continue to function smoothly without interruptions.

Are there any security concerns with HTTP/3?›

HTTP/3 maintains the same security features as HTTP/2, including the use of encrypted channels (using TLS 1.3) to protect data transmission. The protocol itself was designed with security in mind, incorporating features like end-to-end encryption and improved connection privacy. However, as with any new technology, there is potential for unforeseen security risks, and keeping your web server and browser software updated is always a prudent approach.

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