Building a D&D stat block in minutes, not a spreadsheet
Hand-building a stat block means juggling ability modifiers, proficiency bonus, hit dice, save DCs and XP by CR, and getting every one of them to agree with each other. The stat block generator at /stat-block-generator takes a sentence describing the creature and returns the whole thing, math checked, in the current Monster Manual format.
· 5 min read · TerrainTale
One sentence in, a finished block out
Describe what the creature is, what it does, and roughly how dangerous it should be — "a hag who trades in stolen names, CR 7" is enough. Naming a CR is optional; leave it out and the generator picks one that fits the concept. The example prompts on the page show the range this works across, from a CR 1/2 goblin gang boss to a CR 18 ancient bog dragon with legendary actions.
Two jobs, split cleanly
An AI model drafts the creature — concept, ability scores, hit dice, traits, and the wording of every action — following the 2024 format rules. The generator then computes everything that's actually arithmetic: modifiers, proficiency bonus and XP from the CR, hit points from hit dice and size, every attack bonus, every save DC, and the average of every damage roll in the text. None of that math is left to the language model to get right in its head; it's recomputed from the design the model returned, so the numbers in the block always agree with each other.
The 2024 format, not the old one
The block comes out in the current Monster Manual layout, following SRD 5.2: Initiative gets its own line with the modifier and the score in parentheses, saving throws sit inside the ability table instead of a separate line, attacks read "Melee Attack Roll: +5" rather than "to hit," and a line the creature has nothing for — no resistances, no legendary actions — is left out rather than filled with a dash. It does not produce 2014-style blocks.
Getting it onto the table
Copy the finished block as Markdown for your own notes, print it or save it as a PDF for the table, or read it aloud straight from the page. With a free account, the same monster can go straight onto a 3D battle map with its HP already tracked and an initiative slot waiting — the generator and the table are built to hand off to each other.
What's free and what needs an account
The first stat block needs no account at all — describe a creature and it generates immediately. After that one, a free TerrainTale account keeps the generator going with no limit; the paid plan is about how many scenes you can keep on the 3D table, not about how many stat blocks you can make.
What used to take longest
Building a stat block by hand is mostly bookkeeping, not creativity — looking up the proficiency bonus for a given CR, working out hit points from a hit die and a Constitution score, checking that an attack's bonus actually matches the ability it's supposedly using. None of that is where the interesting part of monster design lives, and it's exactly the part a spreadsheet or a blank template leaves entirely up to you to get right and keep consistent across a dozen fields.