Wat is HTTP/2?
Snelle definitie
HTTP/2 is de tweede grote versie van het HTTP-protocol die prestaties verbetert via multiplexing, header-compressie en server push, waardoor pagina's sneller laden.
HTTP/2 was designed to address the performance limitations of HTTP/1.1, which was standardized in 1997. The biggest improvement is multiplexing — the ability to send multiple requests and responses simultaneously over a single TCP connection. In HTTP/1.1, browsers had to open multiple connections and requests were processed sequentially, creating a bottleneck.
Key features of HTTP/2 include: multiplexed streams (multiple requests/responses on one connection without blocking), header compression (HPACK reduces redundant header data), stream prioritization (browsers can indicate which resources are most important), and binary framing (more efficient than HTTP/1.1's text-based protocol).
HTTP/2 requires HTTPS — another incentive to secure your site with an SSL certificate. Most modern web servers, CDNs, and hosting platforms support HTTP/2 by default.
HTTP/3 (based on QUIC protocol using UDP instead of TCP) is the next evolution, offering even better performance for unreliable connections and reducing connection establishment time. Major browsers and platforms are already supporting HTTP/3.
Waarom het belangrijk is
HTTP/2 can improve page load times by 30-50% compared to HTTP/1.1, especially for sites with many resources (images, scripts, stylesheets). This improvement happens at the protocol level — you don't need to change your website code to benefit.
HTTP/2 also reduces server load because it needs fewer connections, and its compression reduces bandwidth usage. For high-traffic sites, this translates to meaningful infrastructure cost savings.
Praktijkvoorbeelden
An image-heavy photography portfolio loaded 40% faster after enabling HTTP/2 because 100+ images could be requested simultaneously instead of 6 at a time
A web application that made 50+ API calls per page saw request completion time drop by 35% after upgrading to HTTP/2 multiplexing
A hosting provider enabled HTTP/2 across all their servers, and their customers' average page load times decreased by 25% without any code changes
An e-commerce site's product pages (which load 80+ resources each) saw the biggest improvement from HTTP/2 — from 3.5s to 1.8s on average
Gerelateerde termen
Page Speed
Paginasnelheid is de maatstaf voor hoe snel een webpagina laadt en interactief wordt, met directe invloed op de gebruikerservaring en zoekmachinerankings.
TTFB (Time to First Byte)
TTFB meet de tijd van het moment dat een browser een pagina aanvraagt totdat het de eerste byte aan gegevens van de server ontvangt, als indicator van serverrespons.
CDN (Content Delivery Network)
Een CDN is een netwerk van geografisch verspreide servers die webinhoud aan gebruikers levert vanaf de server die het dichtst bij hen staat, waardoor laadtijden worden verkort.
SSL Certificate
Een SSL-certificaat is een digitaal beveiligingscertificaat dat gegevens versleutelt die worden overgedragen tussen een website en zijn bezoekers, aangeduid door het slotpictogram en HTTPS.
Hulp nodig met http/2?
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