Your co-GM, explained

A Game Master Assistant is an AI-powered tool that helps tabletop RPG game masters prepare and run campaigns. Instead of scattering notes across docs and spreadsheets, you store everything in one place. LoreKeeper reads your lore, generates content grounded in your world, and gives you an AI co-pilot that knows your entire setting.

Sign up for free, create a world, and upload your campaign notes as lore documents. LoreKeeper chunks and indexes everything automatically. Then start chatting — the AI already knows your world. You can also use the free generators without an account.

LoreKeeper is free to start: create a world, upload lore, and chat. Premium features like image generation, video cutscenes, sound effects and the worldbook tool use credits. When you want more, top up, or subscribe for a monthly allowance.

LoreKeeper works with any tabletop RPG system. D&D 5e, Pathfinder 2e, Call of Cthulhu, Blades in the Dark, FATE, or fully homebrew. Upload your rules as lore documents and the AI will reference them in chat and content generation.

LoreKeeper accepts PDF, DOCX, TXT, and Markdown files. Drag and drop them into the Lore tab and the AI automatically reads, chunks, and indexes the content. You can also paste notes straight in.

Every message you send is enriched with relevant lore from your world using retrieval-augmented generation. The AI searches your lore documents, finds the most relevant chunks, and includes them as context. This means it can answer questions about your NPCs, locations, factions, and plot threads accurately.

Upload your custom rules, homebrew mechanics, or house rules as lore documents. LoreKeeper treats them the same as any world lore — they become searchable, and the AI references them when generating content or answering questions about your game.

Yes. Every entity (character, monster, faction) has its own chat mode. The AI roleplays as that entity using their description, personality, backstory, and rules. Ask your tavern keeper about local rumours or interrogate the villain about their plans.

Yes. Generate a share link from the Outputs tab and send it to your players. They get a read-only view of your world lore — no account needed. You control what they see.

Yes. LoreKeeper has built-in generators for characters, monsters, and NPCs. Each generator pulls context from your world lore so the results fit your setting. Generated entities include a description, appearance, backstory, rules, and an AI-generated portrait.

LoreKeeper generates images grounded in your world lore. When you generate a character portrait, location art, or battle map, the AI enriches the prompt with details from your lore so the art matches your setting. You can generate images in the Studio or as part of entity creation.

Open the Scenes tool in Studio. Describe a moment from your campaign — a battle, a dramatic reveal, a journey. The AI breaks it into a storyboard of shots with director-style prompts, generates an image for each shot, then renders them into video cutscenes. Play them at the table to set the mood.

Yes. The Studio includes an AI sound effects generator. Describe any sound — a dragon roar, tavern ambiance, spell casting, sword clash, creaking door — and LoreKeeper generates a downloadable audio clip you can play during your sessions.

The Worldbook tool turns your world into a professional PDF sourcebook. The AI analyses your lore and plans chapters, you review and edit the structure in an interactive editor, then LoreKeeper generates a formatted document with a cover page, table of contents, and rich content. Share the PDF with your players or print it.

The Generator Generator lets you create custom content generators for any type of entity. Want a generator for taverns, ships, magical artifacts, or alien species? Define the fields you need and LoreKeeper builds a reusable generator that produces content grounded in your world lore every time.

LoreKeeper uses Anthropic Claude for intelligent chat and worldbuilding, specialist vision models for image analysis, and dedicated AI models for image generation, video rendering, and sound effects. Each feature uses the best model for the job.