How to fix "413 Request Entity Too Large" in Nginx – cPanel

Introduction

When a user attempts to upload a large file, you might encounter the following error message:

413 Request Entity Too Large

You need to configure Nginx to accept larger files.

Create a folder for the user, ensuring "USER" is replaced with the cPanel user:
```
mkdir -p /etc/nginx/conf.d/users/USER
```
Create the file for the configuration options to reside in, replacing FILENAME with a valid file name that does not begin with "cpanel-":
```
nano /etc/nginx/conf.d/users/$username/FILENAME.conf
```
Place the following line within the newly created file, adjusting the value according to your needs:
```
client_max_body_size 32M;
```
Rebuild the Nginx configuration for the user, ensuring "USER" is replaced with the cPanel user:
```
/scripts/ea-nginx config USER
```

You may also need to adjust the upload limits for ModSecurity and PHP. You can view details on how to do so in the following support articles: