RPG Builder

Lifestyle & Education GamingSubscription

$10/moStarting price

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About RPG Builder

RPG Builder provides a suite of tools for Dungeons & Dragons 5e Dungeon Masters to prepare, run and document sessions. It combines four integrated studios—Characters, World, Adventures and Art Studio—into a single campaign interface. Users can generate NPCs, monsters, taverns, loot and other session elements, then save them directly to a persistent world. The platform includes a bestiary with 334 stat blocks, an encounter calculator, and a spell library with 319 spells. It also offers image generation and editing features such as text-to-image, image-to-image, and style transfer, along with tools for creating tokens, animated maps and 3D printable miniatures. The system emphasizes continuity by linking all generated content to a single campaign record that persists between sessions.

Key features

Character Sheet Generator
NPC Generator
World Builder
Session Prep and Recap tools
Image Generation and Editing
Token and Map Creation
Encounter Calculator
Spell and Magic Item Creation

Use cases

Preparing D&D 5e campaigns with generated NPCs and locations
Running sessions with integrated prep notes and recaps
Creating custom tokens, maps and 3D printable miniatures

Pros

Integrated campaign management across characters, world, adventures and art
Built-in generators for NPCs, monsters, locations and items
Includes a full bestiary with encounter calculator and spell library
Image generation and editing tools for tokens, maps and miniatures
Persistent campaign storage linking all generated content

Cons

No pricing details visible on homepage
Limited to Dungeons & Dragons 5e system
Requires user account to access tools

Frequently asked questions about RPG Builder

What is RPG Builder and who is it designed for?

RPG Builder is a suite of tools designed for Dungeons & Dragons 5e Dungeon Masters to prepare, run, and document sessions. It consolidates four integrated studios—Characters, World, Adventures, and Art Studio—into a single campaign interface.

How does RPG Builder help with session preparation?

The platform allows users to generate NPCs, monsters, taverns, loot, and other session elements, then save them directly to a persistent world. It includes tools like the bestiary, encounter calculator, and spell library to streamline prep work.

What image generation and editing features does RPG Builder offer?

RPG Builder provides text-to-image, image-to-image, and style transfer capabilities. It also includes tools for creating tokens, animated maps, and 3D printable miniatures, enhancing visual storytelling at the table.

Can RPG Builder generate custom content for homebrew campaigns?

Yes, the platform includes a monster creator and spell creator that allow users to design homebrew content while maintaining compatibility with official rules. Generated content is linked to a single campaign record for continuity.

How does RPG Builder ensure continuity between sessions?

All generated content—characters, locations, adventures, and art—is saved to a persistent campaign record. This ensures that details remain accessible and consistent across multiple sessions.

What resources are available for learning D&D 5e rules within RPG Builder?

The platform offers guides for all 12 classes, including subclasses, spell lists, and features by level. It also provides a full SRD bestiary with stat blocks and an encounter calculator to assist with rule adherence.