Content as structured data

We compile content to syntax trees and syntax trees to content.
We also provide hundreds of packages to work on the trees in between.
You can build on the unified collective to make all kinds of interesting things.


We provide the building blocks: from tiny, focussed, modular utilities to plugins that combine them to perform bigger tasks. And much, much more. You can build on unified, mixing and matching building blocks together, to make all kinds of interesting new things.

  1. Prettier

    Uses unified to format Markdown

  2. Gatsby

    Uses unified to pull content into GraphQL

  3. Write Music

    Uses unified to visualize sentence length

  4. Node.js

    Uses unified to check and build their docs

  5. alex

    Uses unified to catch insensitive, inconsiderate writing

  6. See 23 other cases


We provide the interface: for parsing, inspecting, transforming, and serializing content. You work on structured data. Learn how to plug building blocks together, write your own, and make things with unified.

  1. Intro to unified

    Guide that summarises the what and why of unified

    1. guide
    2. welcome
    3. introduction
  2. Use unified

    Guide that delves into transforming Markdown to HTML

    1. guide
    2. use
    3. transform
    4. remark
    5. rehype
  3. Tree traversal

    How to do tree traversal (also known as walking or visiting a tree)

    1. recipe
    2. unist
    3. tree
    4. traverse
    5. walk
    6. visit
  4. Find a node

    How to find a node in any unist syntax tree

    1. recipe
    2. node
    3. tree
    4. traverse
    5. walk
    6. find
  5. Support tables in remark

    How to support GitHub-style tables in remark (or react-markdown)

    1. recipe
    2. remark
    3. plugin
    4. gfm
    5. github
    6. table
  6. See 10 other articles


The ever growing ecosystem that the unified collective provides today consists of 350 open source projects, with a combined 52k stars on GitHub. In comparison, the code that the collective maintains is about 185 Moby Dicks or 73 Linuxes. In the last 30 days, the 533 packages maintained in those projects were downloaded 1b times from npm. Much of this is maintained by our teams, yet others are provided by the community.

  1. unist-util-visit

    unist utility to visit nodes
    1. 85%
    2. 43m
    3. 811 B
  2. hast-util-to-parse5

    hast utility to transform hast to Parse5’s AST
    1. 80%
    2. 18m
  3. react-markdown

    React component to render markdown
    1. 84%
    2. 7m
    3. 44.2 kB
  4. mdast-util-find-and-replace

    mdast utility to find and replace text in a tree
    1. 76%
    2. 7m
    3. 1.27 kB
  5. micromark-factory-destination

    micromark factory to parse destinations (found in resources, definitions)
    1. 79%
    2. 10m
  6. See 533 packages and 350 projects


Maintaining the collective, developing new projects, keeping everything fast and secure, and helping users, is a lot of work. In total, we’ve closed 5k issues/PRs while 208 are currently open (4%). In the last 30 days, we’ve cut 28 new releases.

  1. keplersj/remark-preset-lint-starstuff@2.0.3·

    2.0.3 (2023-05-23)

    Bug Fixes
    • deps: update dependency remark-preset-lint-consistent to v5.1.2 (6d318e0)
    • deps: update dependency remark-preset-lint-markdown-style-guide to v5.1.3 (ce678a1)
    • deps: update dependency remark-preset-lint-recommended to v6.1.3 (95b1f76)
  2. syntax-tree/hast-util-to-estree@2.3.3·

    (same as 2.3.2 but with missing generated types)

    Full Changelog: https://github.com/syntax-tree/hast-util-to-estree/compare/2.3.2...2.3.3

  3. syntax-tree/mdast-util-mdx-jsx@2.1.4·

    • 58e7ca3 Fix wrong indent on text elements when serializing

    Full Changelog: https://github.com/syntax-tree/mdast-util-mdx-jsx/compare/2.1.3...2.1.4

  4. Explore recent releases


Thankfully, we are backed financially by our sponsors. This allows us to spend more time maintaining our projects and developing new ones. To support our efforts financially, sponsor or back us on OpenCollective.

  1. Vercel

    Develop. Preview. Ship. – Creators of nextjs.org

  2. GatsbyJS

  3. Motif

    When content meets code, magic happens ✨

  4. HashiCorp

  5. GitBook

  6. See 42 other sponsors