HTTP/3 is the third major version of the Hypertext Transfer Protocol, built on QUIC rather than TCP. QUIC provides multiplexed connections over UDP, eliminating head-of-line blocking and reducing connection establishment to a single round-trip. HTTP/3 improves performance through zero-RTT connection resumption, better congestion control, and connection migration that survives network changes—particularly beneficial for mobile users switching between Wi-Fi and cellular. For URL shortening services, HTTP/3 adoption significantly reduces redirect latency. The elimination of TCP's three-way handshake means the redirect response arrives faster. Connection migration ensures redirects complete even when users move between networks, reducing failed redirects on mobile devices.
HTTP/3
The latest version of HTTP running on the QUIC protocol. Eliminates TCP head-of-line blocking and accelerates redirect responses.
Dec 23, 2025 · About 1 min read
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Related Terms
HTTP/2
The successor protocol to HTTP/1.1. Dramatically improves web page loading speed through multiplexing, header compression, and server push.
HTTPS
The secure version of HTTP that encrypts data transmitted between a browser and a web server using TLS.
TTFB
The time from when a browser sends a request to when it receives the first byte of the response. A fundamental metric for server responsiveness.
CDN
A network of geographically distributed servers that deliver web content from the location nearest to the user. Improves speed and reliability.
Redirect Latency
The delay incurred during a shortened URL's redirect process. A critical performance metric that directly affects user experience and conversion rates.
SSL/TLS
Cryptographic protocols that provide secure communication over the internet by encrypting data between client and server.
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