The DM Companion icon

The DM Companion

by rudivdwalt · Just for Fun
Manifest V3 Free
View in Chrome Web Store Data as of 16 Oct 2026

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

Users
51
+7 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
1
0 in 30 days
Store rank
#108K
#90K among extensions
Version
0.5
updated 20 Mar 2026

Users

monthly, 8 months
02651Feb 2026Jul 2026Oct 2026
Latest, 16 Oct 2026: 51 usersMove the mouse over the chart for any month

Ratings count

monthly, 8 months
001Feb 2026Jul 2026Oct 2026
Latest, 16 Oct 2026: 1 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About The DM Companion

The DM Companion is a lightweight browser overlay designed for Dungeon Masters who play online. Default Shortcut key to open it is: Ctrl + Shift + Space for PC, or Cmd + Shift + Space on Mac. 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: NEW FEATURE: Added all the Magic Items from the SRD, so look up your favourite magic items. NEW FEATURE: DICE TRAY - as I was loading all the Magic Items, many of them have random tables that can be rolled on, so I decided to add a Dice Tray with full on Dice rolling (it's not 3D physics based, but it gets the job done with a nice little animation, and keeping a log of what was rolled and the result!). So you can now roll your favourite D&D dice, and any Magic Item with random tables or damage rolls can be rolled from the description right there and then, the results being recorded along with damage type and values from the tables that was rolled on! 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. Magic Items also recently added! NPC Generator: Create unique names on the fly (by Species and Gender) and save them to a list for later. Expand upon just a name with procedurally generated Physical Hooks, Mannerisms, Speaking Styles, Secret Desires, Moods, and Ideals based on species. Campaign Notes: A rich-text editor for session plans, loot tracking, and scratchpad ideas. Auto-saves as you type. Dice tray: Roll on random tables from the magic items, or just because rolling dice is fun! D20, D12, D10, D100, D8, D6 and D4 all present! ⌨️ 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!

Growth

WindowUsersChangeRatingsRating
7 days−6−10.5%00.00
30 days+7+15.9%00.00
6 months+7+15.9%00.00

Version history

3 versions recorded
0.520 Mar 2026
0.49 Mar 2026
0.315 Feb 2026

Details

Category
Just for Fun
First seen
15 Feb 2026
Size
237 KB
Languages
en
Pricing
Free
Extension ID
pcdceelknofjidhgdfgemnbgdlogpflj

Permissions and risk

Moderate riskimpact 2, likelihood 2
Permissions
storage

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