Polyhedral is an online virtual tabletop tool for tabletop role-playing games, built around the idea of βBring your books. Run your game.β It aims to let GMs and players keep rulebooks, notes, maps, and game sessions in one place and use everything directly in the browser. The site emphasizes that there is no installation and no complex setup required.
The product is centered on online tabletop play. Users can upload PDF rulebooks, adventures, and supplements, then search them in full text. During a session, they can open any page, pin frequently used pages, and reduce the need to switch between multiple documents. The tabletop features include map uploads, Token placement, drawing, mouse-wheel zooming, drag-and-drop movement, and basic grid editing. It also provides built-in character sheets, 3D dice, real-time chat, and encounter tracking. One notable detail is that the library is described as βYour books stay yours,β highlighting that users do not need to repurchase content on the platform, which also reduces platform lock-in.
Current pricing information is very simple: everything is free during the Beta, with no limits and no credit card required. However, the developer page states that developer features require a paid plan, while official pricing and plan details have not yet been announced. Developer support appears fairly comprehensive, including a React SDK, Polyhedral component library, 19 component references, dice API, storage, theme variables, field schema, MCP tools, MCP Server, Webhooks, real-time event subscriptions, CLI, and REST API. These can be used to build custom character sheets, automation tools, or integrations with AI assistants such as Claude and Cursor.
The main advantages are its low barrier to entry, making it suitable for groups that want to start playing online quickly; the deep integration between the PDF library and sessions is very practical for GMs who need to look up rules and reference pages; and the free Beta lowers the cost of trying it out. The drawbacks are that it is still in Beta, with an unclear long-term commercialization strategy. The site does not disclose details about team permissions, security compliance, backups, privacy, or support. It also does not state whether self-hosting or enterprise-grade management features are supported.
Polyhedral is best suited to TRPG GMs, regular campaign groups, and technically capable players who want to develop custom character sheets or AI-assisted workflows. Access from mainland China cannot be determined from the available text, so it should be considered unknown; supported payment methods are also not disclosed. If access or the ecosystem does not meet your needs, alternatives to consider include Roll20, Foundry Virtual Tabletop, Owlbear Rodeo, and Fantasy Grounds.
β This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on polyhedral.co official site.
polyhedral.co is an Unknown SaaS Tools provider. TG4G tracks its product information, an overall rating of 6.0/10, and a China-accessibility score of Workable. Click "Visit Official Site" to reach polyhedral.co directly.