Nginx Config Formatter & Beautifier

An nginx.conf file with 200 lines of server blocks, location directives, upstream definitions, and if conditions — all with inconsistent indentation from months of quick edits in production. You need to restructure it before adding a new reverse proxy rule, but the nesting structure is unclear.

What Is an Nginx Config Formatter?

An Nginx config formatter takes Nginx configuration files and restructures them with consistent block indentation, aligned directives, and proper spacing. Nginx configuration uses a C-like block syntax with nested contexts (http, server, location, upstream), and proper indentation is essential for understanding which directives apply to which context.

This tool supports:

• Consistent block indentation — 2-space or 4-space indentation for nested blocks
• Directive alignment — consistent spacing after directive names
• Comment preservation — keeps inline and block comments in place
• Multi-context support — http, server, location, upstream, events, stream

Nginx Configuration Structure

Nginx configuration uses a hierarchical block structure:

• Main context: Global settings like worker_processes, error_log, pid
• events block: Connection handling settings (worker_connections)
• http block: HTTP server settings, containing server blocks
• server block: Virtual host configuration with listen, server_name, and location blocks
• location block: URL path matching with proxy_pass, root, try_files
• upstream block: Load balancing groups of backend servers

Each nesting level should be indented consistently to show which directives belong to which context.

Common Use Cases

Server migration: Before migrating Nginx configurations to a new server, format them to clearly see all virtual hosts, SSL settings, proxy rules, and rewrites.

Security audit: Formatted configs make it easy to spot misconfigured security headers, missing SSL directives, overly broad location matches, and exposed internal paths.

Load balancer configuration: When configuring complex upstream groups with health checks, weights, and failover rules, proper formatting reveals the complete topology.

Documentation: Format Nginx configs before including them in runbooks, wiki pages, or infrastructure documentation for your team.

Frequently Asked Questions

Does this handle Nginx Plus directives? Yes. The formatter treats all directive names equally — Nginx Plus specific directives like health_check, status_zone, and sticky are formatted the same as standard Nginx directives.

Can it format included files? The formatter processes the configuration text you provide. It handles include directives as regular Nginx directives but does not resolve or follow the included file paths.

Does it validate Nginx syntax? The formatter checks for balanced braces and basic structural correctness. It does not validate directive names or parameter values — use nginx -t for full syntax validation.

Is my Nginx config sent to a server? No. All formatting runs entirely in your browser. No configuration data is transmitted anywhere. Your server configuration details never leave your device.