AI Dungeon Master for D&D™ 5e
A D&D 5e campaign that lives in your conversation. You write what you do, in your own words. The Dungeon Master writes back.
The throne room is silent except for the creak of your armor. The king's body lies cold on the stone floor. Above the throne, the crown hovers in mid-air, cracked down the center, leaking light like a wound.
I reach for it.
The crown screams. Not a sound you hear with your ears. A sound that lives in your bones. Your vision whites out.
The crown's scream claws at your mind. Hold on to yourself.
Roll: 1d20+2
d20[12] +2 = 14
14
SUCCESSYou hold. Barely. The scream fades. The crown drifts lower, trembling, as if deciding whether to trust you. Every torch in the room has gone out. The only light is the gold bleeding from the fracture.
What do you do?
Play your adventureYour First Quest
From landing here to standing in a world: three choices, no books required.
Pick a world and the tier that fits: a cosy first delve, a dark frontier, a bronze-age voyage. Or describe your own and the DM treats it as canon.
Pick a painted pregen and start immediately, or build your own through the guided creation wizard: the math is handled, the story is yours.
The full creation wizard if you want the math, or a painted pregen if you want to start now.
The dungeon door opens. The DM speaks. Your adventure begins.
You stand at the edge of Thornfield as night falls. Somewhere past the treeline, something howls. The notice in your pocket reads ADVENTURERS WANTED. The ink is still wet.
The Worlds
Hand-crafted worlds in level-banded campaigns, or infinite freedom. Start at level 1, or walk straight into an epic.
4 worlds · 9 campaigns · levels 1 to 20
A Cosy Corner of Classic Fantasy
The village of Thornfield, the Whispering Woods, and a crown broken into five pieces. Warm, whimsical, and kind to first-time adventurers. Its dungeons run deep: the Bramble Hollow Den, and a Shattered Keep where Krag the Foul holds Isla Ash captive.
“The crown fragment pulses with a cold light. Something in the dark growls.”
A Dark-Fantasy Frontier
A living darkness called the Umbra devours the world beyond the holy light of the Beacon. Make your name as a Venturer out of the fortress-town of Emberfort, and follow the truth of the Apostasy all the way down. Three campaigns carry you from your first descent to the fall of empires.
“The Umbra stretches to the horizon. Beyond it, nothing returns.”
A Bronze Age of Seafaring and Empire
Four hundred years before Brightvale fell, oar-and-sail galleys charted waters that should not exist. Wonder and intrigue above, a cosmic dread waiting past the edge of the map. Sail from the floating sea-city of Pattis, play the great powers of Athregal and Ziramat against each other, and end where mortals contend with life, death, and divinity itself. Four campaigns, all the way to level 20.
“The chart ends in open water. The captain keeps sailing.”
Spoken into Existence
Describe any world you can imagine, up to four thousand characters of it, and the DM treats your description as canon. High fantasy, grimdark, comedy, political intrigue: the tone, the era, and the rules of the setting are yours to declare.
“You stand at the edge of a world that does not yet exist. Speak, and it will.”
Bring Your Own· III
The campaign on your shelf and the character in your drawer are not retired. The Endlessness reads them.
Upload a campaign you bought, downloaded, or wrote yourself. The Endlessness reads the whole document and builds a private, playable world from it: its places, characters, factions, and quests. Then you pick a hero and step in.
On the Adventurer and Legend plans.
Photograph the sheet from your last table, even a handwritten one. The Endlessness reads it, rebuilds the character rule-true, and shows you everything for review before you play.
Included on every plan.
48 ready-made heroes with painted portraits. Whoever you choose, the world will remember them.
Choose a hero and play free →The Party· IV
Recruit companions who fight beside you, share the party's XP, rest when you rest, and level up on Sidekick rules. Tap any of them for a full character sheet.
Sella wipes the harbor rain off her crossbow and looks you over, unimpressed. "You're the one sailing past the edge of the chart? You'll want someone who can shoot straight when the water starts glowing. I work for shares and I don't cook."
Welcome aboard, Sella.
She joins the party. Sella, Sidekick Expert, level 3: crossbow +5, Cunning Action, and strong opinions about your rigging. Her sheet is one tap away, and she levels when you do.
Sella
Sidekick Expert · Level 3
The Dungeon Master· V
of Worlds
Every scene painted with sensory detail. Every NPC given voice and motive. The story adapts to your choices, tightens when you need tension, and exhales when you need wonder.
Every scene narrated live
“The candle gutters. For a moment, you think you see a face in the shadow on the wall.”
of Law
Every roll verified. Every modifier calculated. Every rule applied as written.
Rules enforced, not improvised
“That requires a spell slot, and you have used both your 2nd-level slots. Use a 3rd-level slot instead?”
of Realms
Nothing forgotten. NPC locations tracked. Quest arcs maintained. Faction standings updated. When you return to a village after ten sessions, it remembers you.
Worlds persist across sessions
“Kira the merchant remembers you. ‘You saved my caravan three tendays ago. I have something for you.’”
D&D with friends is always better. We build for the moments the table cannot happen. Read our full position
The Rules· VI
This is D&D 5e as written, enforced from the SRD 5.2.1. When you push past a rule, the DM tells you which one, and why.
Large monstrosity, unaligned
Armor Class 13 (natural armor)
Hit Points 59 (7d10 + 21)
Speed 40 ft., climb 40 ft.
STR
20 (+5)
DEX
12 (+1)
CON
17 (+3)
INT
3 (−4)
WIS
12 (+1)
CHA
7 (−2)
Skills Perception +5
Senses darkvision 60 ft., passive Perception 15
Challenge 3 (700 XP, PB +2)
Multiattack. The owlbear makes two Rend attacks.
Rend. Melee Attack Roll: +7, reach 5 ft. Hit: 14 (2d8 + 5) slashing damage.
One of 330 SRD creatures, run exactly as printed
The Adventurer's Guild
Every world, campaign, and companion is on Free. The plans raise the ceilings and unlock importing your own campaigns. No contracts, no hidden fees.
Everything you need to start your adventure.
For dedicated players who want more from every session.
For marathon campaigns and deep rosters.
Lore & Legends
The Endlessness is an AI Dungeon Master that runs complete Dungeons & Dragons™ 5th Edition campaigns. You write what your character does in your own words, and the DM narrates the story, enforces the rules from the SRD 5.2.1, runs combat with full initiative tracking, and remembers your world across sessions. It ships with 4 worlds and 9 campaigns spanning levels 1 to 20, 12 character classes, 9 playable species, and the complete SRD spell list of 339 spells.
More questions answered on the full FAQ page.
Word of Mouth
“I'm from the UK, and have just moved to a new town, so finding DnD groups is tough, so your website has been incredible to fill the gap. I'm surprised more people don't know about it!”
“I started play ADnD in the 80s, and I absolutely love this game. The descriptive text from the DM is beautiful. I'm playing a paladin, and the DM responds well to my role playing. I've established two churches, got a big congregation and converted one of my party. It handles my battle tactics for the party really well too, and allows me to think outside the box. When I had a few magic swords, I asked a blacksmith to reforge some of them into a magic shield. Brilliant!”
“I've been trying your AI DM and its probably the best and easiest one to use. It actually respect dnd rules and has a long term memory unlike other AIs.”
The Story Continues
Your first adventure is free. Your first character takes five minutes. The only thing standing between you and the dungeon is a single click.
What do you do?
Free · No credit card · Plays in your browser
