What is try_files in nginx: Explanation and Usage

try_files in nginx is a directive that checks for the existence of one or more files or directories in order and serves the first found. If none are found, it can redirect to a fallback location like an error page or another URI.

How It Works

The try_files directive works like a checklist for nginx. Imagine you want to find a file to show to a visitor. nginx looks at each file or directory you list in order. If it finds one that exists, it stops checking and serves that file.

If none of the files or directories exist, nginx can then send the visitor to a fallback location, like a custom error page or another URL. This makes your server smart about what to show without failing immediately.

Think of it like trying different keys on a door: you try each key until one fits, or you give up and go to a backup plan.

Example

This example shows nginx trying to serve a requested file, then an index.html in the directory, and finally redirecting to a 404 error page if neither exists.

nginx

location / {
    try_files $uri $uri/ /404.html;
}

Output

If the requested URI matches an existing file, nginx serves it.
If not, it checks if a directory exists and serves its index file.
If neither exists, nginx serves /404.html as a fallback.

When to Use

Use try_files when you want nginx to check multiple possible file locations before deciding what to serve. It is very useful for:

• Serving static files with fallback to index pages.
• Handling clean URLs in web applications by trying real files first, then routing to an app handler.
• Providing custom error pages when files are missing.

This helps improve user experience by avoiding unnecessary errors and making your site more flexible.

Key Points

• try_files checks files or directories in order and serves the first found.
• If no files are found, it can redirect to a fallback URI or error page.
• It is commonly used for static file serving and clean URL handling.
• Helps avoid 404 errors by providing fallback options.

Key Takeaways

try_files lets nginx try multiple file paths and serve the first existing one.

It improves site reliability by providing fallback options like custom error pages.

Commonly used for static content serving and clean URL routing in web apps.

It works by checking files or directories in the order you list them.

If no file is found, nginx can redirect to a fallback URI or show an error page.