Best D&D Dungeon Master Tools & Resources

26 March 2026

The right tools don’t make you a better DM—but they do remove friction. Less time looking things up mid-session, fewer gaps in your prep, more mental space for the actual game. This list covers the tools that experienced DMs actually use, along with free alternatives for everything.

No single tool here is essential. The best setup is the simplest one that works for your prep style.

Reference Tools: Rules at Your Fingertips

D&D Beyond (free tier)

D&D Beyond’s free tier gives you access to the basic rules, monster listings, spell descriptions, and class features for core content. The search is fast and the mobile interface works well at the table.

Best for: Looking up rules mid-session. Much faster than flipping through a physical book when a player asks “does Hold Person work on undead?”

Paid tier: Lets you access sourcebooks digitally and build characters with full content. Useful if your group uses it collectively, less so individually.

System Reference Document (SRD)

The full 5e core rules are available free via the official SRD at dnd.wizards.com. The 5.1 SRD covers monsters, spells, classes, and rules completely. It’s not beautifully formatted, but it’s comprehensive and always available.

Best for: DMs who want complete reference access without paying, or who prefer PDFs they can download and search.

Encounter Building

Kobold Fight Club / Improved Initiative

Kobold Fight Club (now called CritterDB) lets you build encounters, calculate XP budgets, and track initiative in real time. You input party size and levels, add monsters, and it tells you the difficulty rating instantly.

Best for: DMs who want to verify encounter balance quickly, especially when improvising. Understanding XP thresholds manually is worth doing once—after that, a calculator speeds things up considerably.

We also have a free Encounter Generator right here on Roll for Two that handles party-scaled encounter building with SRD monsters.

Flee, Mortals! Monster Compendium

A paid supplement with redesigned monsters that play faster and more distinctly at the table. Not essential, but beloved by DMs who find the base Monster Manual encounters samey at higher levels.

Maps and Visuals

Inkarnate (free + paid)

Inkarnate is a browser-based map maker for world maps and regional maps. The free tier includes a solid selection of assets. Good for creating a campaign map that players can reference throughout a campaign.

Best for: DMs who want a visual world map without drawing one by hand.

Dungeon Scrawl (free)

A browser-based dungeon mapper that produces clean, grid-based dungeon maps quickly. Drag to draw rooms, add details, export as PNG. Faster than most alternatives for simple layouts.

Best for: Quick dungeon maps before a session when you don’t have time for elaborate tools.

Owlbear Rodeo (free)

A lightweight virtual tabletop (VTT) for sharing maps and moving tokens. Works in the browser, no accounts required for players. Excellent for groups who play online or hybrid (some in-person, some remote).

Best for: Online and hybrid groups who want something between “Discord screenshare” and a full VTT like Roll20.

NPCs and Improvisation

Fast NPC Generators

When players go somewhere you didn’t expect, you need an NPC immediately. Some options:

• NPC in a Hurry — our own generator: role, mannerism, motivation, secret. One click.
• Donjon (donjon.bin.sh) — generates names, personality traits, and ideals/bonds/flaws. Good for populating a town quickly.
• Behind the Name — for generating culturally-consistent character names when the setting matters.

Tavern Prompt Pack

For tavern scenes specifically, our Tavern Prompt Pack generates a name, atmosphere, rumour, NPC, and scene hook—filtered by location type and vibe.

Music and Ambiance

Syrinscape

Subscription-based sound software with licensed D&D content, including official adventure soundscapes. Expensive but excellent quality. Best for DMs who run regularly and want to invest in atmosphere.

Tabletop Audio (free)

Free, browser-based ambient music and sound effects organised by theme: dungeon, tavern, battle, city, forest. No account required. Loops seamlessly. One of the best free audio options available.

Best for: DMs who want background music without spending money or managing software.

Spotify / YouTube

Search “D&D tavern music” or “dungeon ambiance” on either platform and you’ll find hours of curated playlists. Not as interactive as Syrinscape, but free and requires zero setup.

Session Prep

Notion or Obsidian

Both are note-taking tools that DMs use to build campaign wikis—tracking NPCs, locations, session notes, and plot threads.

• Notion is cloud-based and easy to share with players if you want them to have access to a campaign journal.
• Obsidian is offline-first, uses plain markdown files, and has a plugin ecosystem including a D&D-specific template pack.

Best for: DMs running long campaigns who need organised reference material.

Index Cards (seriously)

Physical index cards for NPCs, locations, and encounter notes. Cheap, fast, and tactile. Many experienced DMs use nothing else. Writing a card forces you to summarise—which means you only prep what’s actually necessary.

Thinking About Your Own Setup

Start minimal. A tablet with D&D Beyond and one ambient music tab covers most sessions. Add tools when you feel a specific gap—when you’re spending time on something that a tool could automate.

The DMs who run the best sessions usually prep less, not more. Tools should free up time for thinking about your players, not replace thinking with more software.

Related Guides

• How to Prep a Session in Under an Hour — what to actually spend prep time on
• How to Run D&D Combat Faster — tools help, but technique matters more
• Common Mistakes New DMs Make — over-relying on tools is one of them
• Session Zero for Dungeon Masters — start any campaign with the right foundation