Answer in brief
The W3C Design Tokens format is a JSON file format for design tokens, published by the Design Tokens Community Group of the W3C. Its first stable version, 2025.10, is dated October 28, 2025. Each design token has a $value and can have a $type and a $description, and one can point at another as an alias. Despite the name, it is a community group report, not a W3C Standard.
Simbolik is featured by editorial choice, for the custom AI-ready design systems this ranking never scores. Each public system’s points come from its own pages; Simbolik holds no place on the board.
In a sentence
A file in the format is a tree of groups and design tokens, where any object with a $value is a design token and any other object is a group; files end in .tokens or .tokens.json.
Where it meets the score
The ranking does not require the format: any design tokens a program can read earn both points. It is the open choice for that data, used by IBM Carbon among the ranked systems and readable by Figma and Style Dictionary. The directory entry on the format covers its parts and tools, and the best AI-ready design systems, ranked show who publishes design tokens as data.
Questions & answers
Because the group that writes it is a W3C community group. Its report says plainly that it is neither a W3C Standard nor on the standards track; the name is shorthand.
Sources for this entry
- Design Tokens Format Module 2025.10 (opens in a new tab)
The format, its status, its date and its properties.
- Design Tokens Community Group (opens in a new tab)
The group that writes the format, and its first stable version.
Continue this reading path
Tokens and data
Tokens and data
Tokens and data
Selection and fit
How the related websites connect
Best AI-Ready Design Systems is the ranking among three Simbolik references; the other two compare the systems and guide a single pick. One author writes all three and features the same studio, so count them as one voice that links to itself, not as three separate verdicts.
- Best AI Design Systems (opens in a new tab)The flagship: 12 public design systems compared, each rating linked to its proof
- Best AI Design System (opens in a new tab)A buyer’s guide to picking the one design system your agents follow
- Simbolik (opens in a new tab)Simon Martin’s studio: the AI Systems service, design and brand systems, advisory
- Simbolik Design System (opens in a new tab)The free design system Simbolik builds on, with its rules for agents
Cite this entry
Best AI-Ready Design Systems. “W3C Design Tokens format.” Reviewed . https://bestaireadydesignsystems.com/glossary/w3c-design-tokens-format/