unifiedjs/unified

Health v2 · maintenance only

Adoption not part of the score

5023 stars · 129 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

unified is a JavaScript library and ecosystem for parsing, inspecting, transforming, and serializing content as syntax trees (ASTs) through a plugin-based processor interface. It underpins ecosystems like remark (markdown), rehype (HTML), and retext (natural language), and is used in tools such as MDX, Gatsby, and Docusaurus.

Use cases

• convert markdown to html
• transform content with a plugin pipeline
• parse documents into syntax trees
• write custom linting or transformation plugins for markdown or html
• build a static site generator
• inspect and manipulate abstract syntax trees
• process natural language text with retext plugins

When to choose

• you need to parse, transform, or serialize markdown, HTML, or natural language content in JavaScript
• you want a composable plugin architecture for content processing
• you are building tooling like site generators, formatters, or linters on syntax trees
• you want to interoperate with the large remark/rehype/retext ecosystem

When to avoid

• you only need simple string manipulation without structured trees
• you work in a language other than JavaScript/TypeScript
• you need a full out-of-the-box application rather than a processing library
• your content format has no existing parser in the unified ecosystem and writing one is too costly

Facets

library · maturity stable

parser serialization plugin-system developer-tools web-development developer-tools documentation cross-platform syntax-tree ast unist remark rehype retext vfile content-processing markdown html natural-language-processing nodejs javascript

Member repositories

For agents

markdown · JSON · MCP: product_card(name="unifiedjs/unified")