Create complete D&D 5th edition monsters in the classic 2014 layout or the new 2024 style. A math engine sets the numbers: Armor Class, hit points, attack bonuses, save DCs, and damage all derive from the Challenge Rating you pick, on curves calibrated against every monster in the 5e SRD. The abilities come from a library of shapes written against the official monsters of each kind: an ambusher, a charger, a grappler, a binder, a tomb warden. Each shape is scaled to your CR and fitted to your concept. The AI names the creature, writes its lore, and proposes a signature ability that the tool fits to the closest shape, all around numbers it cannot change, so a CR 12 skirmisher from this tool hits like an official CR 12 skirmisher.
This tool is part of a suite of game master tools including an encounter generator, NPC generator, dungeon generator, magic item generator, and worldbuilding dashboard. Monsters you make here can be dropped into encounters, attached to NPCs, or placed in dungeon rooms.
Challenge Rating sets the baselines. AC, hit points, attack bonus, and save DC each follow a curve fitted to the official monsters, and total damage per round comes from the Dungeon Master's Guide's damage bands. A multiattack splits that budget across its attacks, an area effect gets about half of it, and a once-per-fight nova can spend most of it at once. Legendary monsters deal about 60% of their budget on their own turn and the rest through legendary actions, matching how official legendaries are costed. Save DCs always derive from 8 + proficiency + ability modifier, and every block passes an automated review of more than a hundred checks calibrated so that no official SRD monster would trip them.
The combat role shifts those baselines the way official monster design does. A defender and a lurker of the same CR are very different fights that award the same XP:
Leave the role on Auto and the tool reads your concept and picks: a “tomb guardian” resolves to a defender, a “dune ambusher” to a lurker.
Some monsters are defined by their body rather than a role. Swarms, oozes, and true dragons are read from your concept and built on their own chassis. A swarm gets the official weapon resistances, extra hit points, and damage that halves at half hit points. An ooze corrodes, engulfs, and squeezes through cracks. A dragon gets the breath weapon, flight, and frightful presence in one kit.
The 2024 rules mostly changed how monsters are written. A 2024 block prints Initiative on the statblock, shows each ability's modifier and save in one table, merges damage and condition immunities into a single line, capitalizes conditions and damage types, and uses new phrasing for attacks and saves: “Melee Attack Roll: +7” without “to hit,” and saving throws written as “Constitution Saving Throw: DC 15” with Failure and Success lines. Bonus Actions get their own section, and new vocabulary appears: Emanation areas and Bloodied for half hit points.
Both editions run on the same math engine, but each is priced to its own damage curve. The 2014 damage-per-CR curve runs lower than the 2024 one, so a monster generated under 2014 rules hits a little softer than its 2024 counterpart, on purpose. A monster generated under the 2014 rules is born with its 2024 printing, and tabs on the card flip between them instantly. A 2024 monster, or one saved before this change, converts to the other edition once with an AI pass and then carries both printings the same way. Conversion translates wording only and never changes numbers, with one exception that matches the official 2024 reprints: blanket resistance to nonmagical bludgeoning, piercing, and slashing is dropped, and the tool tells you when it does this.
Yes. The free tier includes 5 AI generations per 24 hours, and statblocks and edition conversions share that count. Premium ($5/month) removes the limit across every tool on the site.
Yes. The AI never chooses the numbers. AC, hit points, attack bonuses, save DCs, and damage are computed from the CR and combat role on curves calibrated against the official SRD monsters. Abilities are fitted from shapes written against those monsters and scaled to the CR, and an automated review checks every block against the conventions they follow. When no shape fits the AI's idea for a signature ability, a proven one from the library stands in rather than an unchecked ability.
Yes. Every field edits inline on the card, including the name, ability scores, detail lines, and each trait or action. Editing a number shows the engine's expected band for that CR, and individual abilities can be re-rolled with AI without regenerating the whole monster.
Yes. Monsters generated under the 2014 rules arrive with both printings already saved, at no extra cost. For a 2024 monster, or one saved before that change, a one-time AI conversion rewrites the wording into the other edition's style while the numbers stay identical. Both printings are then saved on the monster, with tabs to flip between them instantly. A conversion counts as one generation on the free tier.
Homebrewery markdown, including the 2024 monster frame, for styled PDFs. Foundry VTT via the 5e Statblock Importer module. Improved Initiative JSON, where 2024 blocks include native Bonus Actions and the Initiative modifier. Roll20 through the Conjure Creature Chrome extension.
In your browser's local storage, organized into folders. Use the sidebar's Data options to export a backup file or move your collection to another device. Private browsing windows can't save, so the tool asks for a standard window.
Yes. Saved monsters can be dropped into the encounter generator with XP budgeting, attached to NPCs, and generated inside the dungeon and NPC tools, all of which use this same engine and honor your 2014/2024 preference.