Foundry Virtual Tabletop

Foundry Virtual Tabletop is a commercial, self-hosted web application that provides a real‑time virtual tabletop environment for running role‑playing games. It exposes a comprehensive JavaScript API for systems and module development and can be run as an Electron desktop client or as a Node.js server for remote play.

Key Features

• Modular architecture with first‑class support for community Systems, Modules and Worlds, and an in‑app package browser for installation
• Developer‑oriented API using JavaScript, HTML and CSS enabling custom UI, document types and canvas interactions
• Advanced canvas rendering: dynamic lighting, line‑of‑sight, fog of war, shaders and high‑performance fog rendering using worker threads
• Compendium/pack support and data migration improvements (document schema and LevelDB migration noted in recent releases)
• Runs as a packaged Electron client or a Node.js server; supports modern web features including HTTP/2 for improved transfer performance
• Built‑in asset starter packs, playlist/audio controls and a chat/combat system tailored for TTRPG workflows
• Demo mode and a public demo environment suitable for evaluation and online demos

Use Cases

• Host and run remote tabletop RPG sessions with synchronized scene state, lighting and token controls
• Develop and publish custom game systems, UI modules, and content packs using the documented JavaScript API
• Build community servers, one‑shot events or paid content modules leveraging the package and compendium system

Limitations and Considerations

• Commercial proprietary license: Foundry VTT requires a purchased license to run official releases and access bundled content
• Major core updates can introduce API deprecations and breakage for third‑party modules; module compatibility management is an ongoing community challenge
• No integrated, first‑party video/voice conferencing; most groups use external services for voice/video during play

Foundry VTT is oriented toward users and developers who want deep customization and control over their virtual tabletop environment. It prioritizes a powerful, extensible API and high‑fidelity canvas features, making it a strong choice for technically minded GMs and community content creators.