D&D 5e monster statblock generator (2014 & 2024 rules)

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 AI writes the creature's abilities and flavor 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.

How the numbers are calculated

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 roughly ninety checks calibrated so that no official SRD monster would trip them.

What the combat roles do to the math

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:

• Balanced: the raw mathematical baseline for the CR.
• Brute: trades a point of AC for about 25% more hit points and harder single hits.
• Defender: +2 AC and extra hit points, paid for with about 15% less damage. Usually carries a protection reaction.
• Skirmisher: baseline numbers plus a movement trick like bonus-action disengage, flyby, or burrow.
• Artillery: thin defenses in exchange for long-range attacks and an escape tool.
• Controller: +1 to save DCs and about 30% less damage. Restraints, slows, and blinds do the work.
• Lurker: fragile and weak in a stand-up fight, with an opening strike that spends the missing damage all at once.
• Support: buffs, heals, and enables allies. Deliberately underperforms its CR when fought alone.
• Swarm: a mass of Tiny creatures with weapon resistances, extra hit points, and damage that halves below half hit points, per the official swarm rules.

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.

2014 vs. 2024 statblocks

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 here, so the numbers are identical either way. Any saved monster can be converted to the other edition once. After that, both printings are stored on the monster and tabs flip between them instantly. Conversion translates wording only, 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.

Frequently asked questions