The DM Companion

A lightweight, overlay-based DM screen for managing combat, lookup rules and take notes on any webpage.

The DM Companion is a lightweight browser overlay designed for Dungeon Masters who play online. Whether you use a Virtual Tabletop (like Roll20 or Foundry), a campaign manager (like D&D Beyond), or just Google Docs, The DM Companion sits on top of your current tab, giving you instant access to your most vital tools. Stop alt-tabbing through a dozen windows to find a spell description or a condition rule. Just hit the shortcut, and your screen is ready. ⚔️ KEY FEATURES: Player Dashboard: Keep your party's vital stats (AC, Passive Perception, Spell Save DC) visible at all times. Instant Rules Lookup: Quickly reference Conditions, Actions, Weapon Properties, and Hazards without searching a wiki. SRD Spellbook: Filter and search hundreds of spells by Class and Level instantly. Item Reference: Look up weapons, armor, and adventuring gear - including costs and weights. NPC Generator: Create unique names on the fly (by Species and Gender) and save them to a list for later. Campaign Notes: A rich-text editor for session plans, loot tracking, and scratchpad ideas. Auto-saves as you type. ⌨️ SHORTCUTS & CUSTOMIZATION: Default Hotkey: Press Ctrl + Shift + Space (or Cmd + Shift + Space on Mac) to toggle the overlay. Customizable: Prefer a different key? Go to the Settings tab inside the extension to record your own custom shortcut. 🔒 PRIVACY FIRST: The DM Companion works entirely offline. All your data (players, notes, saved names) is stored locally in your browser. No accounts, no logins, and no cloud servers. Perfect for: DMs who use single-screen setups. Running theatre-of-the-mind games over Discord. Reducing screen clutter during complex combat encounters. Ready to upgrade your DMing experience? Add to Chrome today!