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 369 open source projects, with a combined 53k 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 551 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. mdast-util-to-string

    mdast utility to get the plain text content of a node
    1. 82%
    2. 41m
    3. 369 B
  2. @mdx-js/node-loader

    Experimental Node loader for MDX
    1. 76%
    2. 2k
  3. mdast-util-gfm-autolink-literal

    mdast extension to parse and serialize GFM autolink literals
    1. 75%
    2. 7m
    3. 2.77 kB
  4. hast-to-hyperscript

    Legacy hast utility to transform to something else
    1. 81%
    2. 17m
    3. 7.75 kB
  5. unist-util-is

    unist utility to check if a node passes a test
    1. 83%
    2. 48m
    3. 572 B
  6. See 551 packages and 369 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 207 are currently open (4%). In the last 30 days, we’ve cut 60 new releases.

  1. vfile/vfile-location@5.0.0·


    • Change to require Node.js 16 migrate: update Node
    • 63dcd08 Change to use export map migrate: don’t use private APIs
    • 038c164 Change to return undefined for out-of-bound offsets migrate: check for undefined as a return value in toOffset instead of -1
    • 4d67eb7 Change to yield undefined for invalid points by @remcohaszing in #12, by @wooorm in #13 migrate: check for undefined as a return value in toPoint


    Full Changelog: https://github.com/vfile/vfile-location/compare/4.1.0...5.0.0

  2. syntax-tree/mdast-util-from-markdown@1.3.1·

    • 13430aa Update types for changes in micromark-util-types

    Full Changelog: https://github.com/syntax-tree/mdast-util-from-markdown/compare/1.3.0...1.3.1

  3. micromark/micromark-extension-gfm-strikethrough@1.0.7·

  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