D&D Beyond Campaign DM Screen is a Chrome extension developed by ashdevfr. This free extension falls under the category of Browsers and specifically the subcategory of Add-ons & Tools.

The purpose of this extension is to enhance the campaign page of D&D Beyond by transforming it into a Dungeon Master (DM) screen. With this extension, DMs can easily access important information about their players' characters without having to navigate through multiple tabs or windows.

Once the extension is installed, it adds a section to the campaign page where DMs can view key stats for each character, including their Armor Class (AC), Hit Points (HP), Initiative bonus, Saving Throws, and Passive Checks. This allows DMs to quickly reference important information during gameplay and make informed decisions.

Overall, the D&D Beyond Campaign DM Screen extension provides a convenient and efficient way for DMs to manage and track their players' characters during a D&D campaign.