Built for the encounter that matters
Boss design for GMs who need more than one CR dial.
Boss Forge is a browser-based custom 5e boss generator for mechanically dense encounters, especially at tables where optimized heroes can erase a conventional villain in the opening round.
Why it exists
One challenge rating often forces durability and damage into the same control. Boss Forge separates offensive and defensive CR so a GM can give a villain enough staying power without also creating one-hit damage against a player character.
What you control
Start with your campaign premise and party profile. Choose actions, bonus actions, reactions, legendary actions, lair actions, regional effects, and spellcasting. Every generated field remains editable before export to print, 5e.tools, or Foundry VTT.
One choice at a time
Ability alternatives are generated individually, never as an automatic batch of three. You can keep up to three temporary choices, compare them, select one, and then finalize the monster. Guided requests preserve supplied dice, modifiers, DCs, ranges, and damage types.
Open-rules foundation
The built-in class spell catalog is pinned to SRD 5.2 material under CC BY 4.0. Users may add content they own through editable inputs; Boss Forge does not scrape or bundle proprietary, non-SRD catalogs.
Bring the hard encounter into focus.
Forge the mechanics, review the result, and finalize only when it is ready for your table.
Open the forgeContact
Questions, support requests, and product feedback are welcome in the Boss Forge Discord community.