Technical SEO

What is HTTP/3 and how does it impact SEO?

HTTP/3 is the latest version of the HTTP protocol, built on QUIC. It improves SEO by drastically reducing latency, especially on mobile networks, by handling packet loss more efficiently and speeding up the initial connection handshake. Faster load times directly translate to better Core Web Vitals.

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HTTP/3 is a significant evolution of the protocol that powers the web. Unlike HTTP/1.1 and HTTP/2, which rely on TCP, HTTP/3 uses QUIC (Quick UDP Internet Connections). For SEO, the benefits are primarily centered around speed and connection reliability. One of the biggest advantages is the reduction in 'Head-of-Line Blocking.' In HTTP/2, if one packet of data is lost, all subsequent packets are delayed. HTTP/3 fixes this, allowing other data streams to continue even if one encounters an issue. This makes it particularly effective for mobile users on unstable or slow networks. Additionally, HTTP/3 reduces the 'handshake' time required to establish a secure connection, meaning the first byte of your site reaches the user much faster. While Google doesn't rank you higher just for having HTTP/3, the resulting improvements in your Core Web Vitals (specifically LCP and TTFB) and the overall reduction in bounce rates provide a strong competitive advantage in search rankings.

Průvodce krok za krokem

Check Server Support

Verify if your web server (e.g., Nginx, LiteSpeed) or hosting provider supports HTTP/3.

Enable on CDN

If you use a CDN like Cloudflare, simply toggle the HTTP/3 (with QUIC) setting in the dashboard.

Update SSL/TLS

Ensure your security certificates are up to date, as HTTP/3 requires encryption by default.

Verify Implementation

Use browser developer tools or online HTTP/3 checkers to confirm your site is serving requests via the new protocol.

Monitor Metrics

Track changes in your Largest Contentful Paint (LCP) in Search Console to see the impact.

Pro tipy

Prioritize HTTP/3 if a large portion of your traffic comes from mobile devices.
Check that your firewall settings aren't blocking UDP traffic, which HTTP/3 requires.
Most modern browsers (Chrome, Firefox, Edge) support HTTP/3 automatically.
Don't worry about older browsers; they will automatically fall back to HTTP/2 or HTTP/1.1.

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Jak pSeoMatic pomáhá

At Pseomatic, we track the latest shifts in web infrastructure. We identify if your site is lagging behind modern protocols like HTTP/3, which can cause subtle but persistent performance issues. By upgrading your delivery stack, Pseomatic ensures you maintain a technical edge over competitors still using older, slower protocols.

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Související dotazy

Is HTTP/3 faster than HTTP/2?

Yes, particularly on mobile networks or connections with high packet loss.

Does HTTP/3 require a new SSL certificate?

No, your existing SSL certificate will work, but the protocol handles the security handshake faster.

Is HTTP/3 a direct ranking factor?

No, but the speed improvements it provides are a significant part of the Page Experience ranking factor.

Související průvodci

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