How to increase the memory in your WordPress website without FTP access, or any real full-stack skills.

Step 1. Login to your WordPress website

WP Login
WP Login

Step 2. Go to Plugins, download a File Manager Plugin, Install + Activate the plugin.

File Manager Plugin
File Manager Plugin

Step 3. Select the activated File Manager Plugin in the sidebar menu

WP File Manager Settings
WP File Manager Settings

Step 4. Add

define( 'WP_MEMORY_LIMIT', '64M' );

To your wp-config.php file, press save. Adjust the MB number as needed.

wp-config.php
wp-config.php
define memory
define memory

Step 5. Deactivate + Delete the File Manager Plugin. I personally don't like to leave it activated or installed as it can create a security risk.

Delete WP File Manager
Delete WP File Manager