Atakan Au

This lightweight tool adds a “Deactivate all” link to the Plugins page and a confirmation screen under Tools → Disable All Plugins.
Perfect for: 
– Plugin conflict debugging 
– Maintenance / emergency access recovery 
– When a bad plugin locks you out of wp-admin
Important Warning: Deactivation is immediate. There is no “Reactivate All” button, so you must turn your plugins back on individually. Keep FTP access handy in case reactivating a plugin causes a fatal error.
Visit my blog for details, support and feedback: 
<a href="https://atakanau.blogspot.com/2021/06/one-click-disable-all-plugins-wp-plugin.html?utm_source=wp_org&utm_medium=readme&utm_campaign=first-graders-toolbox&utm_content=description_link" rel="nofollow ugc">1-Click Disable All Plugin</a>

1-Click Disable All

Quickly deactivate all active plugins with one click – ideal for troubleshooting plugin conflicts.

ulsteinmedia

When an emergency suddenly strikes an organization, the website is usually the first place the public turns to for information. There is usually no time to construct a custom crisis site from scratch. Instead, a custom Dark Site can be instantaneously turned on when needed.
Client Crisis (CliCri) offers a prebuilt Dark Site that temporarily disables the normal site, only showing what’s most important for the public. You can prepare content before publishing the Dark Site, and update content when needed. It only takes the click of a button to enter Crisis Mode.
During an emergency, a Dark Site serves a number of key strategic purposes. It positions your organization to be the primary source of accurate information, and signals control and transparency. Running your website normally during times of crisis might indicate that your organization does not take the crisis seriously.

Client Crisis (CliCri)

Client Crisis (CliCri) offers a prebuilt Dark Site that temporarily disables the normal site, only showing what's most important for the public.

1-Click Disable All vs Client Crisis (CliCri)