Enable HTTP/2 by updating the Nginx TLS server block; HTTP/3 is an optional addition that also needs a compatible Nginx build, TLS 1.3, and reachable UDP. Laravel does not need a different front controller: keep serving the app from its public directory and pass PHP requests to PHP-FPM.
Keep Laravel’s existing document root and routing
Start with your current Laravel Nginx server block—or Laravel’s deployment example—and change the protocol settings without changing how the application is served. The document root should point to the project’s public directory. Laravel warns that serving the project root can expose sensitive configuration files. Its deployment example uses try_files to send unmatched requests to public/index.php, which is then handled by PHP-FPM.
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Laravel 13’s deployment documentation lists PHP 8.3 or later. Adjust the PHP-FPM socket and hostname in its example to match your server. The protocol change belongs in Nginx and its TLS setup, not in Laravel’s front-controller architecture. See Laravel’s deployment documentation.
Enable HTTP/2 over your existing HTTPS listener
For current Nginx configuration, keep the TLS listener and enable HTTP/2 with the separate http2 on; directive:
server {
listen 443 ssl;
http2 on;
server_name example.com;
ssl_certificate /path/to/fullchain.pem;
ssl_certificate_key /path/to/private-key.pem;
ssl_protocols TLSv1.2 TLSv1.3;
# Keep the existing Laravel public root, try_files, and PHP-FPM locations.
}The separate http2 directive was introduced in Nginx 1.25.1. Older examples may put http2 directly on the listen line; use the syntax supported by your installed version. Nginx also requires ALPN support for HTTP/2 over TLS; its documentation identifies OpenSSL 1.0.2 as the version from which ALPN is available. Check the Nginx HTTP/2 module documentation.
Keep the private-key file readable by the Nginx master process but restrict access to it. Nginx’s HTTPS configuration guide covers certificate, key, and TLS configuration.
Add HTTP/3 only if the build and network support it
Nginx HTTP/3 uses QUIC over UDP. The optional ngx_http_v3_module requires a compatible build and TLS 1.3; the HTTP/3 listener does not replace the ordinary TCP HTTPS listener. Keep TCP HTTPS available for clients that use HTTP/1.1 or HTTP/2.
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Nginx describes the module as experimental: “The module is experimental, caveat emptor applies.” HTTP/3’s 0-RTT feature is not required for ordinary HTTP/3 and should not be enabled as a routine configuration step; it has stricter TLS-library requirements and requires a separate application-level replay-risk assessment. See the HTTP/3 module documentation and QUIC setup guide.
Illustrative combined server block
This protocol-focused sketch shows the relevant directives, not a tested, drop-in Laravel configuration. Retain your existing Laravel root, try_files, and PHP-FPM locations, and verify your installed Nginx accepts every directive.
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server {
listen 443 ssl;
http2 on;
# QUIC uses UDP; retain the TCP HTTPS listener above.
listen 443 quic reuseport;
server_name example.com;
ssl_certificate /path/to/fullchain.pem;
ssl_certificate_key /path/to/private-key.pem;
ssl_protocols TLSv1.2 TLSv1.3;
# Keep Laravel's existing public root, try_files, and PHP-FPM locations.
add_header Alt-Svc 'h3=":443"; ma=86400' always;
}The Alt-Svc header advertises HTTP/3 to clients; it does not prove that QUIC connections can reach the server. Make sure the port in the advertisement is the externally reachable UDP port. Nginx’s example uses reuseport, which its QUIC guide says is useful when running multiple workers.
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Permit UDP on the advertised port in the host firewall and any cloud security group, load balancer, or network appliance between clients and Nginx. A TCP-only HTTPS path can serve HTTP/1.1 and HTTP/2 while QUIC remains unreachable, so check network controls as well as Nginx configuration.
Check the Nginx build before troubleshooting HTTP/3
-
Inspect the version, build options, and SSL library with
nginx -V. Confirm the installed package includesngx_http_v3_module; if you built Nginx from source, check that it was compiled with--with-http_v3_module. -
Test the configuration with
nginx -t. If it passes, reload Nginx using the service procedure for your operating system. -
Confirm TCP port 443 still serves HTTPS and that UDP on the advertised HTTP/3 port is reachable from outside the server.
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Inspect a response for the
Alt-Svcheader. Then use a browser’s network panel or a command-line client to check the protocol actually negotiated; an advertisement alone does not demonstrate a successful QUIC connection.
For QUIC failures, Nginx recommends testing with a console client such as ngtcp2 before focusing on browser behavior. A debug build’s logs can provide further clues; Nginx notes that QUIC messages in those logs carry a quic prefix. Its QUIC guide describes the build and diagnostic checks.
Account for TLS termination before Laravel
If a load balancer or reverse proxy terminates TLS and forwards plain HTTP to Laravel, the app may see an internal port-80 request and generate HTTP URLs. Configure Laravel’s trustProxies in bootstrap/app.php for the actual trusted proxy addresses and the forwarded headers used by your deployment. Do not trust arbitrary proxies unless your topology warrants it. See Laravel’s trusted-proxy documentation.
Check package security advisories for your exact build
Security status depends on the product, package, and version. NGINX Plus release notes dated September 15, 2026, describe a fix for a limited heap buffer overflow under certain HTTP/3 configurations using OpenSSL 3.5.0 and earlier. That product-specific note is not a blanket statement about every Nginx package. Review current Nginx and distribution advisories for the exact build and TLS library you run. See the NGINX Plus release notes.
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Measure before expecting a speedup
Enabling a protocol does not establish that a particular Laravel site will be faster. To compare HTTP/2 and HTTP/3 on your own workload, measure page or API latency, behavior under packet loss and high latency, CPU use, connection success across your target clients, and the operational complexity of the deployment under the same conditions. Treat the result as workload-specific, not a guaranteed protocol benefit.
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