Free Dungeon Master Tools Online
Everything a GM needs in one tab. Combat tracker, dice roller, battle map, session notes, and ruleset reference cards — works solo or with players connected.
Free forever — no subscription
Runs without players connected
Most VTTs only make sense when everyone is online. Nat20 works as a standalone GM screen at the physical table too — dice roller, map, stat blocks, and notes on your tablet while your players sit across from you.
Your complete GM toolkit
Combat tracker
Initiative, HP, conditions, turn order — manage every combatant without paper.
Dice roller
Every die, custom expressions, secret rolls. Fast and keyboard-friendly.
Battle map
Grid map with tokens for encounters — usable online or projected at the table.
Session notes
Write scene summaries. Keep the whole campaign history in one place.
Ruleset references
Stat blocks, spells, items — look up anything from your ruleset without switching tabs.
No players required
Use Nat20 as a standalone GM screen at the physical table. No internet session needed — just open it on your tablet.
Also see free virtual tabletop and how to play D&D online free.
