Introducing Nginx Config Generator: Production-Ready Nginx Configs Without the Syntax Pain

We built a free nginx configuration generator. Choose your use-case — static site, reverse proxy, SSL termination, or load balancer — fill in your domain and settings, and get a complete, production-ready nginx server block in seconds. No syntax knowledge required. No login. No install.

→ nginx-config-generator.tools.jagodana.com

What Is Nginx and Why Is Its Config So Hard to Write?

Nginx is a high-performance web server and reverse proxy used by a significant portion of the web. It's the layer that sits in front of your Node.js app, your Docker containers, or your static files — handling HTTPS termination, routing, compression, and load distribution.

The problem is its configuration syntax. Nginx uses a custom block-based format with precise placement rules:

server {
    listen 443 ssl;
    server_name example.com www.example.com;
 
    ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:...;
 
    location / {
        proxy_pass http://localhost:3000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}

A misplaced semicolon breaks the server. Missing proxy_set_header directives cause authentication failures. Wrong ssl_protocols settings leave users on deprecated TLS 1.0. The proxy_pass URL with vs. without a trailing slash behaves differently. Getting this right from memory — or from a correct reference — takes longer than it should.

What Does the Nginx Config Generator Do?

The tool generates complete, correct nginx server blocks from a visual form. You fill in fields; it writes the config.

What configuration types does it support?

Four types, covering the most common nginx use-cases:

Reverse Proxy — routes traffic from nginx to a backend service running on a local port or another server. The generated config includes the correct proxy_set_header directives for passing real client IP, protocol information, and the Host header. Optional WebSocket support adds Upgrade and Connection headers.

Static Site — serves files directly with root and index directives. The try_files directive handles SPA routing (falling back to index.html). Optional asset caching sets expires max for images, CSS, and JavaScript.

Load Balancer — generates an upstream block with your backend servers plus the server block that references it. Supports round-robin (nginx default), least-connections (least_conn), and IP-hash (ip_hash) methods. Each backend can have a weight.

HTTP → HTTPS Redirect — a minimal server block that returns 301 or 302 to redirect all HTTP traffic to the HTTPS version of the same URI.

Does it support SSL and Let's Encrypt?

Yes. Enable the SSL toggle and the config includes:

• ssl_certificate and ssl_certificate_key pointing to the standard Certbot paths (/etc/letsencrypt/live/yourdomain/fullchain.pem and privkey.pem)
• ssl_protocols TLSv1.2 TLSv1.3 — no deprecated TLS 1.0/1.1
• A modern cipher suite (ECDHE-ECDSA-AES128-GCM-SHA256, ECDHE-RSA-AES128-GCM-SHA256, etc.)
• HSTS header with a 1-year max-age and includeSubDomains

The cert paths work out of the box after running certbot --nginx — no manual path editing required.

Can I enable HTTPS redirect automatically?

Yes. When SSL is enabled, there's a "Force HTTPS" toggle. Enable it and the generator produces two server blocks: one for port 443 with the full config, and a second for port 80 that does nothing but return 301 https://$host$request_uri. This is the correct pattern — a separate minimal server block, not a redirect inside the SSL block.

How Do You Use the Generated Config?

The generated config goes in /etc/nginx/sites-available/ on Ubuntu/Debian systems.

# Save the config
sudo nano /etc/nginx/sites-available/example.com
# (paste the generated config)
 
# Enable it
sudo ln -s /etc/nginx/sites-available/example.com /etc/nginx/sites-enabled/
 
# Test syntax
sudo nginx -t
 
# Apply
sudo systemctl reload nginx

If nginx -t reports an error, it will tell you the line number and the type of error. But configs from this generator pass nginx -t without edits — that's the point.

What Makes a Good Nginx Reverse Proxy Config?

A proxy config that just works in development often fails in production. Three directives are almost always missing from copy-pasted configs:

proxy_set_header X-Real-IP $remote_addr; Without this, your backend sees 127.0.0.1 as the client IP — nginx's own address. Server-side rate limiting, geolocation, and audit logs break silently.

proxy_set_header X-Forwarded-Proto $scheme; Without this, your backend doesn't know whether the original request was HTTP or HTTPS. Applications that redirect to HTTPS can enter a redirect loop, or generate HTTP URLs in emails and links when HTTPS was expected.

proxy_set_header Host $host; Without this, virtual hosting on the backend breaks — the backend receives localhost instead of the actual requested hostname.

The generator includes all three by default.

How Does Nginx Load Balancing Work?

Nginx distributes requests across backend servers defined in an upstream block. The three main methods:

Round-robin (default) distributes requests sequentially across all backends. Simplest option; works well when all backends have similar capacity and response times.

least_conn sends each new request to the backend with the fewest active connections. Better for requests with variable processing time — a slow request doesn't pile more work on an already-busy backend.

ip_hash hashes the client IP to always route the same client to the same backend. This is session affinity without a shared session store — useful for legacy apps that store session data in memory.

Add a weight to each backend to send proportionally more traffic to higher-capacity servers:

upstream myapp {
    server 10.0.0.1:3000 weight=3;
    server 10.0.0.2:3000 weight=1;
}

This sends 75% of traffic to the first server and 25% to the second.

What Is HSTS and Should I Include It?

HSTS (HTTP Strict Transport Security) is a response header that tells browsers to only connect to your domain over HTTPS — for a specified duration — and to refuse HTTP connections without first trying HTTPS.

add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

max-age=31536000 is one year in seconds. Once a browser has seen this header, it will refuse to load your site over HTTP for one year, even if the user types http:// manually. This eliminates a class of SSL-stripping attacks.

Should you include it? Yes, if your site is fully HTTPS. The generator includes it by default when SSL is enabled.

Caution: Once deployed, removing HSTS doesn't take effect for cached browsers until max-age expires. Don't enable it if you might need to move back to HTTP.

What Does Gzip Compression Do for Nginx?

Gzip compresses HTTP responses before sending them to the client, reducing transfer sizes for text-based content (HTML, CSS, JavaScript, JSON, SVG). Typical compression ratios are 60–80% for text.

The correct nginx gzip configuration includes the right MIME type list:

gzip on;
gzip_vary on;
gzip_proxied any;
gzip_comp_level 6;
gzip_types text/plain text/css text/xml application/json application/javascript
           application/rss+xml application/atom+xml image/svg+xml;

Key detail: gzip_types does not include text/html by default because nginx always compresses HTML when gzip is on — listing it would cause a warning. The generator handles this correctly.

Who Is This For?

Backend developers deploying Node.js, Python, or Go services behind nginx who need the reverse proxy config without looking up proxy_set_header order every time.

DevOps engineers setting up new servers who want a correct base config to customize, not a blank file.

Full-stack developers who configure servers occasionally and want to avoid subtle mistakes in SSL settings or proxy headers.

Startup founders self-hosting who understand what nginx does but don't have its syntax memorized.

Students learning server configuration who want to see a complete, working example alongside the fields that produced it.

Try It Now

nginx-config-generator.tools.jagodana.com

Free. No account. Works in any browser. Config generated entirely in your browser — nothing sent to any server.

Built as part of the 365 Tools Challenge — one useful tool every day for developers, designers, and product builders.