diff --git a/doc/getting-started.md b/doc/getting-started.md
index 9e2b6b6aa..cb86c1e31 100644
--- a/doc/getting-started.md
+++ b/doc/getting-started.md
@@ -2,7 +2,7 @@
 
 # Getting started
 
-**remark** transforms Markdown.
+**remark** transforms markdown.
 It’s an ecosystem of [plugins][].
 If you get stuck, [issues][] and [Discussions][] are good places to get help.
 
@@ -17,7 +17,7 @@ It’s built on [unified][], make sure to read it and its [website][] too.
 
 ## Intro
 
-Out of the box, **remark** transforms Markdown: Markdown is given, reformatted,
+Out of the box, **remark** transforms markdown: markdown is given, reformatted,
 and written:
 
 ```md
@@ -40,7 +40,7 @@ But, much more can be done, [through plugins][plugins].
 
 ## Command line
 
-**remark**’s CLI is a simple way to process Markdown files from the
+**remark**’s CLI is a simple way to process markdown files from the
 command line.  Its interface is provided by [**unified-args**][unified-args].
 
 Install [`remark-cli`][cli] and dependencies (in this case a [linting
@@ -74,9 +74,9 @@ readme.md.md
 
 ## Using remark in a project
 
-In the previous example, `remark-cli` was installed globally.  That’s
-generally a bad idea.  Here we’re going to use the CLI to lint
-an npm package.
+In the previous example, `remark-cli` was installed globally.
+That’s generally a bad idea.
+Here we’re going to use the CLI to lint an npm package.
 
 Say we have the following `package.json`:
 
@@ -84,6 +84,7 @@ Say we have the following `package.json`:
 {
   "name": "my-package",
   "version": "1.0.0",
+  "type": "module",
   "scripts": {
     "test": "node test.js"
   }
@@ -103,10 +104,11 @@ The `--save-dev` option stores the dependencies in our `package.json`:
  {
    "name": "my-package",
    "version": "1.0.0",
+   "type": "module",
 +  "devDependencies": {
-+    "remark-cli": "^9.0.0",
-+    "remark-html": "^13.0.0",
-+    "remark-preset-lint-markdown-style-guide": "^4.0.0"
++    "remark-cli": "^10.0.0",
++    "remark-html": "^14.0.0",
++    "remark-preset-lint-markdown-style-guide": "^5.0.0"
 +  },
    "scripts": {
      "test": "node test.js"
@@ -121,10 +123,11 @@ configuration:
  {
    "name": "my-package",
    "version": "1.0.0",
+   "type": "module",
    "devDependencies": {
-     "remark-cli": "^9.0.0",
-     "remark-html": "^13.0.0",
-     "remark-preset-lint-markdown-style-guide": "^4.0.0"
+     "remark-cli": "^10.0.0",
+     "remark-html": "^14.0.0",
+     "remark-preset-lint-markdown-style-guide": "^5.0.0"
    },
    "scripts": {
 -    "test": "node test.js"
@@ -145,15 +148,16 @@ Now from the command line we can run:
 npm test
 ```
 
-This will lint all Markdown files when we test the project.
+This will lint all markdown files when we test the project.
 [`--frail`][frail] ensures the command fails if a code-style violation
 is found, and [`--quiet`][quiet] hides successful files from the report.
 
 ## Programmatic usage
 
 The programmatic interface of **remark** is provided by
-[**unified**][unified].  In fact, [`remark`][api] is two plugins:
-[`remark-parse`][parse] and [`remark-stringify`][stringify].
+[**unified**][unified].
+In fact, [`remark`][api] is two plugins: [`remark-parse`][parse] and
+[`remark-stringify`][stringify].
 
 Install [`remark`][api] and dependencies with [npm][]:
 
@@ -164,16 +168,17 @@ npm install vfile-reporter remark remark-html remark-preset-lint-markdown-style-
 `index.js` contains:
 
 ```js
-var remark = require('remark')
-var styleGuide = require('remark-preset-lint-markdown-style-guide')
-var html = require('remark-html')
-var report = require('vfile-reporter')
+import {reporter} from 'vfile-reporter'
+import {remark} from 'remark'
+import remarkPresetLintMarkdownStyleGuide from 'remark-preset-lint-markdown-style-guide'
+import remarkHtml from 'remark-html'
 
 remark()
-  .use(styleGuide)
-  .use(html)
-  .process('_Hello_.', function (err, file) {
-    console.error(report(err || file))
+  .use(remarkPresetLintMarkdownStyleGuide)
+  .use(remarkHtml)
+  .process('_Hello_.')
+  .then((file) => {
+    console.error(reporter(file))
     console.log(String(file))
   })
 ```
diff --git a/doc/plugins.md b/doc/plugins.md
index ff953d8e6..6ebf601ad 100644
--- a/doc/plugins.md
+++ b/doc/plugins.md
@@ -2,7 +2,7 @@
 
 # Plugins
 
-**remark** is a Markdown processor powered by plugins part of the [unified][]
+**remark** is a markdown processor powered by plugins part of the [unified][]
 [collective][].
 
 ## Contents
@@ -43,7 +43,7 @@ The list of plugins:
     — new syntax to align text or blocks (new node types, rehype
     compatible)
 *   ⚠️ [`remark-attr`](https://github.com/arobase-che/remark-attr)
-    — new syntax to add attributes to Markdown
+    — new syntax to add attributes to markdown
 *   🟢 [`remark-autolink-headings`](https://github.com/remarkjs/remark-autolink-headings)
     — add GitHub-style links to headings
 *   🟢 [`remark-behead`](https://github.com/mrzmmr/remark-behead)
@@ -130,7 +130,7 @@ The list of plugins:
 *   🟢 [`remark-hint`](https://github.com/sergioramos/remark-hint)
     — add hints/tips/warnings to markdown
 *   🟢 [`remark-html`](https://github.com/remarkjs/remark-html)
-    — serialize Markdown as HTML
+    — serialize markdown as HTML
 *   🟢 [`remark-html-katex`](https://github.com/remarkjs/remark-math/tree/HEAD/packages/remark-html-katex#readme)
     — change inline and block math to equations w/ [KaTeX](https://github.com/Khan/KaTeX)
 *   ⚠️ [`remark-iframes`](https://github.com/zestedesavoir/zmarkdown/tree/HEAD/packages/remark-iframes#readme)
@@ -155,11 +155,11 @@ The list of plugins:
 *   🟢 [`remark-linkify-regex`](https://gitlab.com/staltz/remark-linkify-regex)
     — change text matching a regex to links
 *   🟢 [`remark-lint`](https://github.com/remarkjs/remark-lint)
-    — check Markdown code style
+    — check markdown code style
 *   🟢 [`remark-macro`](https://github.com/dimerapp/remark-macro)
     — support for block macros (new node types, rehype compatible)
 *   🟢 [`remark-man`](https://github.com/remarkjs/remark-man)
-    — serialize Markdown as man pages (roff)
+    — serialize markdown as man pages (roff)
 *   🟢 [`remark-math`](https://github.com/remarkjs/remark-math)
     — new syntax for math (new node types, rehype compatible)
 *   🟢 [`remark-message-control`](https://github.com/remarkjs/remark-message-control)
@@ -187,13 +187,13 @@ The list of plugins:
     — highlight code blocks w/ [Prism](https://prismjs.com/) (supporting most
     Prism plugins)
 *   🟢 [`remark-react`](https://github.com/remarkjs/remark-react)
-    — compile Markdown to [React](https://github.com/facebook/react)
+    — compile markdown to [React](https://github.com/facebook/react)
 *   🟢 [`remark-react-codemirror`](https://github.com/craftzdog/remark-react-codemirror)
     — highlight code blocks for `remark-react` w/ [CodeMirror](https://codemirror.net)
 *   ⚠️ [`remark-redact`](https://github.com/seafoam6/remark-redact)
     — new syntax to conceal text matching a regex
 *   🟢 [`remark-redactable`](https://github.com/code-dot-org/remark-redactable)
-    — write plugins to redact content from a Markdown document,
+    — write plugins to redact content from a markdown document,
     then restore it later
 *   🟢 [`remark-reference-links`](https://github.com/remarkjs/remark-reference-links)
     — transform links and images into references and definitions
@@ -216,7 +216,7 @@ The list of plugins:
 *   🟢 [`remark-simple-plantuml`](https://github.com/akebifiky/remark-simple-plantuml)
     — turn PlantUML code blocks to images
 *   🟢 [`remark-slate`](https://github.com/hanford/remark-slate)
-    — compile Markdown to [Slate nodes](https://docs.slatejs.org/concepts/02-nodes)
+    — compile markdown to [Slate nodes](https://docs.slatejs.org/concepts/02-nodes)
 *   🟢 [`remark-slate-transformer`](https://github.com/inokawa/remark-slate-transformer)
     — compile markdown to [Slate nodes](https://docs.slatejs.org/concepts/02-nodes)
     and Slate nodes to markdown
@@ -246,7 +246,7 @@ The list of plugins:
 *   🟢 [`remark-toc`](https://github.com/remarkjs/remark-toc)
     — add a table of contents
 *   🟢 [`remark-tree-sitter`](https://github.com/samlanning/remark-tree-sitter)
-    — highlight code blocks in Markdown files using
+    — highlight code blocks in markdown files using
     [Tree-sitter](https://tree-sitter.github.io/tree-sitter/)
     (rehype compatible)
 *   🟢 [`remark-truncate-links`](https://github.com/GaiAma/Coding4GaiAma/tree/HEAD/packages/remark-truncate-links)
@@ -254,7 +254,7 @@ The list of plugins:
 *   🟢 [`remark-twemoji`](https://github.com/madiodio/remark-twemoji)
     — turn emoji into [Twemoji](https://github.com/twitter/twemoji)
 *   🟢 [`remark-typedoc-symbol-links`](https://github.com/kamranayub/remark-typedoc-symbol-links)
-    — turn Typedoc symbol link expressions into Markdown links
+    — turn Typedoc symbol link expressions into markdown links
 *   🟢 [`remark-typescript`](https://github.com/trevorblades/remark-typescript)
     — turn TypeScript code to JavaScript
 *   🟢 [`remark-typograf`](https://github.com/mavrin/remark-typograf)
@@ -272,7 +272,7 @@ The list of plugins:
 *   ⚠️ [`remark-variables`](https://github.com/mrzmmr/remark-variables)
     — new syntax for variables
 *   🟢 [`remark-vdom`](https://github.com/remarkjs/remark-vdom)
-    — compile Markdown to [VDOM](https://github.com/Matt-Esch/virtual-dom/)
+    — compile markdown to [VDOM](https://github.com/Matt-Esch/virtual-dom/)
 *   🟢 [`remark-wiki-link`](https://github.com/landakram/remark-wiki-link)
     — new syntax for wiki links (rehype compatible)
 *   🟢 [`remark-yaml-config`](https://github.com/remarkjs/remark-yaml-config)
diff --git a/packages/remark-cli/package.json b/packages/remark-cli/package.json
index ca5c3e72f..7558dde93 100644
--- a/packages/remark-cli/package.json
+++ b/packages/remark-cli/package.json
@@ -1,7 +1,7 @@
 {
   "name": "remark-cli",
   "version": "9.0.0",
-  "description": "CLI to process Markdown with remark",
+  "description": "CLI to process markdown with remark",
   "license": "MIT",
   "keywords": [
     "unified",
diff --git a/packages/remark-cli/readme.md b/packages/remark-cli/readme.md
index 6119228e3..aa0472618 100644
--- a/packages/remark-cli/readme.md
+++ b/packages/remark-cli/readme.md
@@ -11,7 +11,7 @@ Command line interface for [**remark**][remark].
 
 *   Interface by [`unified-args`][unified-args]
 *   Loads [`remark-` plugins][plugins]
-*   Searches for [Markdown extensions][markdown-extensions]
+*   Searches for [markdown extensions][markdown-extensions]
 *   Ignores paths found in [`.remarkignore` files][ignore-file]
 *   Loads configuration from [`.remarkrc`, `.remarkrc.js` files][config-file]
 *   Uses configuration from [`remarkConfig` fields in `package.json`
@@ -31,8 +31,8 @@ npm install remark-cli
 # Add a table of contents to `readme.md`
 $ remark readme.md --use toc --output
 
-# Lint Markdown files in the current directory
-# according to the Markdown style guide.
+# Lint markdown files in the current directory
+# according to the markdown style guide.
 $ remark . --use preset-lint-markdown-style-guide
 ```
 
@@ -44,7 +44,7 @@ info on all available options.
 ```txt
 Usage: remark [options] [path | glob ...]
 
-  CLI to process Markdown with remark
+  CLI to process markdown with remark
 
 Options:
 
@@ -88,7 +88,7 @@ Examples:
 
 ## Security
 
-As Markdown is sometimes used for HTML, and improper use of HTML can open you up
+As markdown is sometimes used for HTML, and improper use of HTML can open you up
 to a [cross-site scripting (XSS)][xss] attack, use of remark can also be unsafe.
 When going to HTML, use remark in combination with the [**rehype**][rehype]
 ecosystem, and use [`rehype-sanitize`][sanitize] to make the tree safe.
diff --git a/packages/remark-cli/test.js b/packages/remark-cli/test.js
index a7464346c..a11a8ac99 100644
--- a/packages/remark-cli/test.js
+++ b/packages/remark-cli/test.js
@@ -16,7 +16,7 @@ test('remark-cli', (t) => {
         [
           'Usage: remark [options] [path | glob ...]',
           '',
-          '  CLI to process Markdown with remark',
+          '  CLI to process markdown with remark',
           '',
           'Options:',
           '',
diff --git a/packages/remark-parse/package.json b/packages/remark-parse/package.json
index 79fd827b2..2e33f938d 100644
--- a/packages/remark-parse/package.json
+++ b/packages/remark-parse/package.json
@@ -1,7 +1,7 @@
 {
   "name": "remark-parse",
   "version": "9.0.0",
-  "description": "remark plugin to parse Markdown",
+  "description": "remark plugin to parse markdown",
   "license": "MIT",
   "keywords": [
     "unified",
diff --git a/packages/remark-parse/readme.md b/packages/remark-parse/readme.md
index fd32f524d..2f17387df 100644
--- a/packages/remark-parse/readme.md
+++ b/packages/remark-parse/readme.md
@@ -9,14 +9,17 @@
 [![Chat][chat-badge]][chat]
 
 [Parser][] for [**unified**][unified].
-Parses Markdown to [**mdast**][mdast] syntax trees.
+Parses markdown to [**mdast**][mdast] syntax trees.
 Built on [`micromark`][micromark] and
 [`mdast-util-from-markdown`][from-markdown].
 Used in the [**remark** processor][remark] but can be used on its own as well.
-Can be [extended][extend] to change how Markdown is parsed.
+Can be [extended][extend] to change how markdown is parsed.
 
 ## Install
 
+This package is [ESM only](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c):
+Node 12+ is needed to use it and it must be `import`ed instead of `require`d.
+
 [npm][]:
 
 ```sh
@@ -26,15 +29,28 @@ npm install remark-parse
 ## Use
 
 ```js
-var unified = require('unified')
-var createStream = require('unified-stream')
-var markdown = require('remark-parse')
-var remark2rehype = require('remark-rehype')
-var html = require('rehype-stringify')
+import {unified} from 'unified'
+import remarkParse from 'remark-parse'
+import remarkGfm from 'remark-gfm'
+import remarkRehype from 'remark-rehype'
+import rehypeStringify from 'rehype-stringify'
+
+unified()
+  .use(remarkParse)
+  .use(remarkGfm)
+  .use(remarkRehype)
+  .use(rehypeStringify)
+  .process('# Hi\n\n*Hello*, world!')
+  .then((file) => {
+    console.log(String(file))
+  })
+```
 
-var processor = unified().use(markdown).use(remark2rehype).use(html)
+Yields:
 
-process.stdin.pipe(createStream(processor)).pipe(process.stdout)
+```html
+<h1>Hi</h1>
+<p><em>Hello</em>, world!</p>
 ```
 
 [See **unified** for more examples »][unified]
@@ -43,9 +59,12 @@ process.stdin.pipe(createStream(processor)).pipe(process.stdout)
 
 [See **unified** for API docs »][unified]
 
-### `processor().use(parse)`
+This package exports no identifiers.
+The default export is `remarkParse`.
+
+### `unified().use(remarkParse)`
 
-Configure the `processor` to read Markdown as input and process
+Configure the `processor` to read markdown as input and process
 [**mdast**][mdast] syntax trees.
 
 ## Extending the parser
@@ -55,7 +74,7 @@ Then create a wrapper plugin such as [`remark-gfm`][gfm].
 
 ## Security
 
-As Markdown is sometimes used for HTML, and improper use of HTML can open you up
+As markdown is sometimes used for HTML, and improper use of HTML can open you up
 to a [cross-site scripting (XSS)][xss] attack, use of remark can also be unsafe.
 When going to HTML, use remark in combination with the [**rehype**][rehype]
 ecosystem, and use [`rehype-sanitize`][sanitize] to make the tree safe.
diff --git a/packages/remark-stringify/package.json b/packages/remark-stringify/package.json
index fcb3b18a9..c7d0a8f57 100644
--- a/packages/remark-stringify/package.json
+++ b/packages/remark-stringify/package.json
@@ -1,7 +1,7 @@
 {
   "name": "remark-stringify",
   "version": "9.0.1",
-  "description": "remark plugin to compile Markdown",
+  "description": "remark plugin to compile markdown",
   "license": "MIT",
   "keywords": [
     "unified",
diff --git a/packages/remark-stringify/readme.md b/packages/remark-stringify/readme.md
index b7a158187..5a31b2773 100644
--- a/packages/remark-stringify/readme.md
+++ b/packages/remark-stringify/readme.md
@@ -9,12 +9,15 @@
 [![Backers][backers-badge]][collective]
 
 [Compiler][] for [**unified**][unified].
-Serializes [**mdast**][mdast] syntax trees to Markdown.
+Serializes [**mdast**][mdast] syntax trees to markdown.
 Used in the [**remark** processor][remark] but can be used on its own as well.
-Can be [extended][extend] to change how Markdown is serialized.
+Can be [extended][extend] to change how markdown is serialized.
 
 ## Install
 
+This package is [ESM only](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c):
+Node 12+ is needed to use it and it must be `import`ed instead of `require`d.
+
 [npm][]:
 
 ```sh
@@ -24,20 +27,30 @@ npm install remark-stringify
 ## Use
 
 ```js
-var unified = require('unified')
-var createStream = require('unified-stream')
-var html = require('rehype-parse')
-var rehype2remark = require('rehype-remark')
-var stringify = require('remark-stringify')
-
-var processor = unified().use(html).use(rehype2remark).use(stringify, {
-  bullet: '*',
-  fence: '~',
-  fences: true,
-  incrementListMarker: false
-})
-
-process.stdin.pipe(createStream(processor)).pipe(process.stdout)
+import {unified} from 'unified'
+import rehypeParse from 'rehype-parse'
+import rehypeRemark from 'rehype-remark'
+import remarkStringify from 'remark-stringify'
+
+unified()
+  .use(rehypeParse)
+  .use(rehypeRemark)
+  .use(remarkStringify, {
+    bullet: '*',
+    fence: '~',
+    fences: true,
+    incrementListMarker: false
+  })
+  .process('<h1>Hello, world!</h1>')
+  .then((file) => {
+    console.log(String(file))
+  })
+```
+
+Yields:
+
+```markdown
+# Hello, world!
 ```
 
 [See **unified** for more examples »][unified]
@@ -46,14 +59,17 @@ process.stdin.pipe(createStream(processor)).pipe(process.stdout)
 
 [See **unified** for API docs »][unified]
 
-### `processor().use(stringify[, options])`
+This package exports no identifiers.
+The default export is `remarkStringify`.
+
+### `unified().use(remarkStringify[, options])`
 
 Configure the `processor` to serialize [**mdast**][mdast] syntax trees to
-Markdown.
+markdown.
 
 ###### `options`
 
-Options can be passed directly, or passed later through
+Options can be passed directly or passed later through
 [`processor.data()`][data].
 
 All the formatting options of [`mdast-util-to-markdown`][to-markdown-options]
@@ -71,10 +87,10 @@ tree, but there are several cases where that is impossible.
 It’ll do its best, but complete roundtripping is impossible given that any
 value could be injected into the tree.
 
-As Markdown is sometimes used for HTML, and improper use of HTML can open you up
+As markdown is sometimes used for HTML, and improper use of HTML can open you up
 to a [cross-site scripting (XSS)][xss] attack, use of `remark-stringify` and
 parsing it again later can potentially be unsafe.
-When parsing Markdown afterwards, use remark in combination with the
+When parsing markdown afterwards, use remark in combination with the
 [**rehype**][rehype] ecosystem, and use [`rehype-sanitize`][sanitize] to make
 the tree safe.
 
diff --git a/packages/remark/readme.md b/packages/remark/readme.md
index 726fc6f07..ede5c929a 100644
--- a/packages/remark/readme.md
+++ b/packages/remark/readme.md
@@ -8,16 +8,16 @@
 [![Backers][backers-badge]][collective]
 [![Chat][chat-badge]][chat]
 
-[**unified**][unified] processor to parse and serialize Markdown.
+[**unified**][unified] processor to parse and serialize markdown.
 Built on [micromark][].
 Powered by [plugins][].
 Part of the [unified][] collective.
 
 *   API by [**unified**][unified]
-*   Parses Markdown to a syntax tree with [`remark-parse`][parse]
+*   Parses markdown to a syntax tree with [`remark-parse`][parse]
 *   [**mdast**][mdast] syntax tree
 *   [Plugins][] transform the tree
-*   Serializes syntax trees to Markdown with [`remark-stringify`][stringify]
+*   Serializes syntax trees to markdown with [`remark-stringify`][stringify]
 
 Don’t need the parser?
 Or compiler?
@@ -25,6 +25,9 @@ Or compiler?
 
 ## Install
 
+This package is [ESM only](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c):
+Node 12+ is needed to use it and it must be `import`ed instead of `require`d.
+
 [npm][]:
 
 ```sh
@@ -37,19 +40,20 @@ npm install remark
 
 ###### Common example
 
-This example lints Markdown and turns it into HTML.
+This example lints markdown and turns it into HTML.
 
 ```js
-var remark = require('remark')
-var recommended = require('remark-preset-lint-recommended')
-var html = require('remark-html')
-var report = require('vfile-reporter')
+import {reporter} from 'vfile-reporter'
+import {remark} from 'remark'
+import remarkPresetLintRecommended from 'remark-preset-lint-recommended'
+import remarkHtml from 'remark-html'
 
 remark()
-  .use(recommended)
-  .use(html)
-  .process('## Hello world!', function (err, file) {
-    console.error(report(err || file))
+  .use(remarkPresetLintRecommended)
+  .use(remarkHtml)
+  .process('## Hello world!')
+  .then((file) => {
+    console.error(reporter(file))
     console.log(String(file))
   })
 ```
@@ -57,7 +61,7 @@ remark()
 Yields:
 
 ```txt
-1:1  warning  Missing newline character at end of file  final-newline  remark-lint
+  1:1  warning  Missing newline character at end of file  final-newline  remark-lint
 
 ⚠ 1 warning
 ```
@@ -68,16 +72,16 @@ Yields:
 
 ###### Settings through data
 
-This example prettifies Markdown and configures [`remark-stringify`][stringify]
+This example prettifies markdown and configures [`remark-stringify`][stringify]
 through [data][].
 
 ```js
-var remark = require('remark')
+import {remark} from 'remark'
 
 remark()
   .data('settings', {emphasis: '*', strong: '*'})
-  .process('_Emphasis_ and __importance__', function (err, file) {
-    if (err) throw err
+  .process('_Emphasis_ and __importance__')
+  .then((file) => {
     console.log(String(file))
   })
 ```
@@ -90,16 +94,16 @@ Yields:
 
 ###### Settings through a preset
 
-This example prettifies Markdown and configures [`remark-parse`][parse] and
+This example prettifies markdown and configures [`remark-parse`][parse] and
 [`remark-stringify`][stringify] through a [preset][].
 
 ```js
-var remark = require('remark')
+import {remark} from 'remark'
 
 remark()
   .use({settings: {emphasis: '*', strong: '*'}})
-  .process('_Emphasis_ and __importance__', function (err, file) {
-    if (err) throw err
+  .process('_Emphasis_ and __importance__')
+  .then((file) => {
     console.log(String(file))
   })
 ```
@@ -114,9 +118,12 @@ Yields:
 
 [See **unified** for API docs »][unified]
 
+This package exports the following identifier: `remark`.
+There is no default export.
+
 ## Security
 
-As Markdown is sometimes used for HTML, and improper use of HTML can open you up
+As markdown is sometimes used for HTML, and improper use of HTML can open you up
 to a [cross-site scripting (XSS)][xss] attack, use of remark can also be unsafe.
 When going to HTML, use remark in combination with the [**rehype**][rehype]
 ecosystem, and use [`rehype-sanitize`][sanitize] to make the tree safe.
diff --git a/readme.md b/readme.md
index 0a66ea516..8b0457906 100644
--- a/readme.md
+++ b/readme.md
@@ -8,23 +8,23 @@
 [![Backers][backers-badge]][collective]
 [![Chat][chat-badge]][chat]
 
-**remark** is a Markdown processor built on [micromark][] powered by
+**remark** is a markdown processor built on [micromark][] powered by
 [plugins][] part of the [unified][] collective.
 
 ## Intro
 
-**remark** is [the world’s most popular Markdown parser][popular]!
+**remark** is [the world’s most popular markdown parser][popular]!
 And it does so much more than parse: it inspects (check, lint) and transforms
-(generate, compile) Markdown too!
+(generate, compile) markdown too!
 
-Everything is possible with plugins, such as [checking Markdown code
+Everything is possible with plugins, such as [checking markdown code
 style (`remark-lint`)][remark-lint], [transforming safely to React
 (`remark-react`)][remark-react], [adding a table of
 contents (`remark-toc`)][remark-toc], or [compiling to man pages
 (`remark-man`)][remark-man].
 
 Internally, remark now uses [micromark][], a new, fast, and tiny CommonMark
-compliant Markdown tokenizer.
+compliant markdown tokenizer.
 It can be GFM compliant with [`remark-gfm`][remark-gfm].
 
 Finally, remark is part of the [unified][website] [collective][governance].
@@ -41,14 +41,14 @@ Learn more about us:
 
 This repository contains the following packages:
 
-*   [`remark-parse`][parse] — Parse Markdown to syntax trees
-*   [`remark-stringify`][stringify] — Serialize syntax trees to Markdown
+*   [`remark-parse`][parse] — Parse markdown to syntax trees
+*   [`remark-stringify`][stringify] — Serialize syntax trees to markdown
 *   [`remark`][api] — Programmatic interface with both `remark-parse` and `remark-stringify`
 *   [`remark-cli`][cli] — Command line interface wrapping `remark`
 
 ## Security
 
-As Markdown is sometimes used for HTML, and improper use of HTML can open you up
+As markdown is sometimes used for HTML, and improper use of HTML can open you up
 to a [cross-site scripting (XSS)][xss] attack, use of remark can also be unsafe.
 When going to HTML, use remark in combination with the [**rehype**][rehype]
 ecosystem, and use [`rehype-sanitize`][sanitize] to make the tree safe.