Mimir - D&D Campaign Assistant

“Remember, I know everything that can be known in the multiverse.” - Mimir, Planescape

Welcome to Mimir, your local-first D&D 5e campaign management tool. Named after the wise floating skull of Planescape lore, Mimir helps Dungeon Masters organize campaigns, run sessions, and keep everything at their fingertips.

Quick Start

New to Mimir? Start with our tutorials:

1. Your First Campaign - Create a campaign and explore the dashboard
2. Your First Module - Build an adventure with maps and monsters
3. Running Your First Session - Use Play Mode to run an encounter
4. Player Display Setup - Set up a second screen for players

Features

Campaign Management

Create and organize campaigns with a structured workflow. Track documents, NPCs, and plot threads across multiple adventure modules.

Interactive Maps

Upload maps (UVTT or images), configure grids, and place tokens. Manage fog of war with line-of-sight calculations and light sources.

Play Mode

Run sessions with a dedicated play interface. Control what players see on a second display while you manage encounters behind the scenes.

D&D 5e Reference

Search monsters, spells, items, and more from your D&D sourcebooks. Quick access to rules when you need them.

PDF Export

Print character sheets, spell cards, and maps with token cutouts for physical play.

Documentation

This documentation is organized using the Diataxis framework:

Download

Get the latest release from GitHub Releases.

Supported Platforms: macOS, Windows, Linux

Getting Help

• Issues: Report bugs on GitHub Issues
• Discussions: Ask questions on GitHub Discussions

Mimir is open source software. See the Developer Documentation if you’d like to contribute.