Deactivate All Plugins
You can deactivate all plugins using FTP access or File Manager.
- Rename /wp-content/plugins to /wp-content/plugins_temp
- Create the folder /wp-content/plugins
This way you will deactivate all the plugins without deleting them one by one from WordPress.
If you rename the folder /wp-content/plugins_temp back to /wp-content/plugins, all the plugins will be activated again.
Note! During this process, do not access the Plugins tab in WordPress to avoid detecting that the plugins are missing and deactivating them all.
Test Only One Plugin
If you want to test only a plugin, copy the plugin folder from /wp-content/plugins_temp in /wp-content/plugins folder after creating it.
- Rename /wp-content/plugins to /wp-content/plugins_temp
- Create the folder /wp-content/plugins
- Copy one plugin folder like /wp-content/plugins_temp/hide-my-wp to /wp-content/plugins/hide-my-wp
Now, after the test, remove the created folder and rename the temp folder back.