Nginx Error Code 413: How to Fix It

Q: What does Nginx 413 Request Entity Too Large mean?

This error means the file upload or request data you're trying to send exceeds the maximum size limit configured in Nginx. The default limit is usually 1MB, which is often too small for file uploads.

Q: Where should I add client_max_body_size in Nginx config?

Add client_max_body_size in the http block for global settings, or in a specific server block for individual sites. Place it before the closing brace of the block you're modifying.

Q: What's a safe value for client_max_body_size?

Common values are 10M-50M for general websites, 100M-500M for file sharing sites, and 1G+ for video upload platforms. Choose based on your largest expected file upload while considering server resources.

Q: Why does Nginx 413 error still occur after increasing the limit?

Check that you reloaded Nginx properly, verify the configuration file syntax, and ensure PHP limits (if applicable) are also increased. Also confirm you're editing the correct configuration file being used by your site.

Q: Can I set different upload limits for different directories?

Yes, use location blocks in your Nginx configuration to set different client_max_body_size values for specific URLs or directories, allowing fine-grained control over upload limits.

Abstract

Nginx Error 413 Request Entity Too Large occurs when a file upload or request body exceeds the server's configured maximum size limit. This error prevents users from uploading files or submitting forms with large data, but can be easily fixed by adjusting Nginx configuration settings.