Nginx Config Generator (server block)

nginx serves most of the web, but its configuration is easy to get subtly wrong: a missing semicolon, an HTTPS redirect loop, or security headers that silently disappear inside a location block. This generator writes a complete, commented server block for a static site, a single-page app, a PHP-FPM site or a reverse proxy to an app on another port, with Let’s Encrypt HTTPS, canonical-host redirects, HTTP/2, gzip, asset caching, security headers, WebSockets and optional rate limiting.

How to use this tool

1. Enter the domain names (the first is the main one) and choose the site type.
2. Fill in the web root, the app address or the PHP-FPM socket.
3. Tick HTTPS, redirects and the extras you want.
4. Save the file, get the certificate, then run nginx -t and reload.

Formula

HTTPS layout: server :80 (ACME challenge + 301 to https) → server :443 for the extra names (301 to the main name) → server :443 for the main name with the site configuration.

try_files decides what is served: $uri $uri/ =404 for static files, /index.html as the fallback for single-page apps, /index.php?$query_string for PHP front controllers. add_header lines in the server block are not inherited by a location that has its own add_header, so the generated locations avoid add_header.

Example

For example.com and www.example.com as a reverse proxy to http://127.0.0.1:3000 with HTTPS, the output has 3 server blocks — the port-80 redirect, www → example.com on 443, and the main site — and its main location contains proxy_pass http://127.0.0.1:3000; with the Host, X-Forwarded and WebSocket upgrade headers.