Open Source TTRPG Tools, Built for You
SessionZero is a free, open-source, and offline-first companion for any tabletop RPG.
⚠️ SessionZero is still in development, but you can try it out as it grows! ⚠️
SessionZero is 100% open source. Inspect, modify, and contribute to the code. No secrets, no hidden fees—just community-driven software. Transparency and freedom.
Everything is user-generated: items, NPCs, monsters, and more. Build your own datasets and templates for any system. Total flexibility, no limits.
SessionZero works fully offline by default. All your data stays on your device unless you choose otherwise. No account required.
SessionZero is built by and for the community. The code is public, the roadmap is open, and your ideas shape the project. Fork it, contribute, or just use it, your choice.
View the code on GitHub →
The core app is free forever and open source. Use it offline, create and manage your own content, and download from the community. Want to host or join online games? Self-host for free, or use our official servers with a subscription for extra convenience.
Learn more about features and pricing →