diff --git a/bin/generateCssDocs.js b/bin/generateCssDocs.js
index 825af02c..51ee94f1 100644
--- a/bin/generateCssDocs.js
+++ b/bin/generateCssDocs.js
@@ -1,8 +1,12 @@
+import path from 'path'
 import sass from 'sass'
 import table from 'markdown-table'
+import { readFile, writeFile } from './fs.js'
 import { replaceInReadme } from './replaceInReadme.js'
 import postcss from 'postcss'
 
+const __dirname = path.dirname(new URL(import.meta.url).pathname)
+
 const START_MARKER = '<!-- CSS variable options start -->'
 const END_MARKER = '<!-- CSS variable options end -->'
 
@@ -25,7 +29,7 @@ function extractCSSVariables (node) {
 
 // Find all the CSS variables declared on the :host and print them out
 // into the README as documentation
-async function generateMarkdownTable (css) {
+async function generateCssVariablesData (css) {
   const ast = postcss.parse(css)
   const hosts = ast.nodes.filter(({ selector }) => ([':host', ':host,\n:host(.light)'].includes(selector)))
   const darkHosts = ast.nodes.filter(({ selector }) => selector === ':host(.dark)')
@@ -34,7 +38,7 @@ async function generateMarkdownTable (css) {
 
   const sortedVars = vars.sort((a, b) => a.name < b.name ? -1 : 1)
 
-  const data = sortedVars.map(({ name, value, comment }) => {
+  return sortedVars.map(({ name, value, comment }) => {
     const darkIndex = darkVars.findIndex(_ => _.name === name)
     let darkValue = darkIndex !== -1 ? darkVars[darkIndex].value : ''
     if (darkValue === value) {
@@ -45,18 +49,39 @@ async function generateMarkdownTable (css) {
 
     return [wrap(name), wrap(value), darkValue ? wrap(darkValue) : '', comment || '']
   })
+}
+
+function generateMarkdownTable (cssData) {
   const headers = ['Variable', 'Default', 'Default (dark)', 'Description']
   return table([
     headers,
-    ...data
+    ...cssData
   ])
 }
 
+async function replaceInCustomElementsJson (cssData) {
+  const jsonFilename = path.join(__dirname, '../custom-elements.json')
+  const json = JSON.parse(await readFile(jsonFilename, 'utf8'))
+
+  const unwrap = _ => _.substring(1, _.length - 1) // remove backticks
+
+  json.modules[0].declarations[0].cssProperties = cssData.map(([name, value, darkValue, comment]) => {
+    return {
+      name: unwrap(name),
+      description: `${comment} (default: ${value}${darkValue ? `, dark default: ${darkValue}` : ''})`.trim(),
+      default: JSON.stringify(unwrap(value))
+    }
+  })
+  await writeFile(jsonFilename, JSON.stringify(json, null, 2), 'utf8')
+}
+
 async function main () {
   const css = sass.renderSync({ file: './src/picker/styles/variables.scss' }).css.toString('utf8')
 
-  const markdown = await generateMarkdownTable(css)
+  const cssData = await generateCssVariablesData(css)
+  const markdown = generateMarkdownTable(cssData)
   await replaceInReadme(START_MARKER, END_MARKER, markdown)
+  await replaceInCustomElementsJson(cssData)
 }
 
 main().catch(err => {
diff --git a/custom-elements.json b/custom-elements.json
new file mode 100644
index 00000000..047c5de2
--- /dev/null
+++ b/custom-elements.json
@@ -0,0 +1,232 @@
+{
+  "schemaVersion": "1.0.0",
+  "readme": "",
+  "modules": [
+    {
+      "kind": "javascript-module",
+      "path": "picker.js",
+      "declarations": [
+        {
+          "kind": "class",
+          "description": "Lightweight emoji picker distributed as a web component",
+          "name": "Picker",
+          "superclass": {
+            "name": "HTMLElement"
+          },
+          "tagName": "emoji-picker",
+          "customElement": true,
+          "attributes": [
+            {
+              "name": "locale",
+              "description": "Locale string",
+              "type": "string",
+              "default": "\"en\""
+            },
+            {
+              "name": "data-source",
+              "description": "URL to fetch the emoji data from",
+              "type": "string",
+              "default": "\"https://cdn.jsdelivr.net/npm/emoji-picker-element-data@^1/en/emojibase/data.json\""
+            },
+            {
+              "name": "skin-tone-emoji",
+              "description": "The emoji to use for the skin tone picker",
+              "type": "string",
+              "default": "\"🖐\""
+            }
+          ],
+          "members": [
+            {
+              "name": "locale",
+              "description": "Locale string",
+              "kind": "field",
+              "default": "\"en\""
+            },
+            {
+              "name": "dataSource",
+              "description": "URL to fetch the emoji data from",
+              "kind": "field",
+              "default": "\"https://cdn.jsdelivr.net/npm/emoji-picker-element-data@^1/en/emojibase/data.json\""
+            },
+            {
+              "name": "skinToneEmoji",
+              "description": "The emoji to use for the skin tone picker",
+              "kind": "field",
+              "default": "\"🖐\""
+            },
+            {
+              "name": "i18n",
+              "description": "i18n object",
+              "kind": "field"
+            },
+            {
+              "name": "customEmoji",
+              "description": "Array of custom emoji",
+              "kind": "field"
+            },
+            {
+              "name": "customCategorySorting",
+              "description": "Function to sort custom category strings (sorted alphabetically by default)",
+              "kind": "field"
+            }
+          ],
+          "events": [
+            {
+              "name": "skin-tone-change",
+              "description": "This event is fired whenever the user selects a new skin tone."
+            },
+            {
+              "name": "emoji-click",
+              "description": "The `emoji-click` event is fired when an emoji is selected by the user."
+            }
+          ],
+          "cssProperties": [
+            {
+              "name": "--background",
+              "description": "Background of the entire `<emoji-picker>` (default: `#fff`, dark default: `#222`)",
+              "default": "\"#fff\""
+            },
+            {
+              "name": "--border-color",
+              "description": "(default: `#e0e0e0`, dark default: `#444`)",
+              "default": "\"#e0e0e0\""
+            },
+            {
+              "name": "--border-size",
+              "description": "Width of border used in most of the picker (default: `1px`)",
+              "default": "\"1px\""
+            },
+            {
+              "name": "--button-active-background",
+              "description": "Background of an active button (default: `#e6e6e6`, dark default: `#555555`)",
+              "default": "\"#e6e6e6\""
+            },
+            {
+              "name": "--button-hover-background",
+              "description": "Background of a hovered button (default: `#d9d9d9`, dark default: `#484848`)",
+              "default": "\"#d9d9d9\""
+            },
+            {
+              "name": "--category-emoji-padding",
+              "description": "Vertical/horizontal padding on category emoji, if you want it to be different from `--emoji-padding` (default: `var(--emoji-padding)`)",
+              "default": "\"var(--emoji-padding)\""
+            },
+            {
+              "name": "--category-emoji-size",
+              "description": "Width/height of category emoji, if you want it to be different from `--emoji-size` (default: `var(--emoji-size)`)",
+              "default": "\"var(--emoji-size)\""
+            },
+            {
+              "name": "--category-font-color",
+              "description": "Font color of custom emoji category headings (default: `#111`, dark default: `#efefef`)",
+              "default": "\"#111\""
+            },
+            {
+              "name": "--category-font-size",
+              "description": "Font size of custom emoji category headings (default: `1rem`)",
+              "default": "\"1rem\""
+            },
+            {
+              "name": "--emoji-padding",
+              "description": "Vertical and horizontal padding on emoji (default: `0.5rem`)",
+              "default": "\"0.5rem\""
+            },
+            {
+              "name": "--emoji-size",
+              "description": "Width and height of all emoji (default: `1.375rem`)",
+              "default": "\"1.375rem\""
+            },
+            {
+              "name": "--indicator-color",
+              "description": "Color of the nav indicator (default: `#385ac1`, dark default: `#5373ec`)",
+              "default": "\"#385ac1\""
+            },
+            {
+              "name": "--indicator-height",
+              "description": "Height of the nav indicator (default: `3px`)",
+              "default": "\"3px\""
+            },
+            {
+              "name": "--input-border-color",
+              "description": "(default: `#999`, dark default: `#ccc`)",
+              "default": "\"#999\""
+            },
+            {
+              "name": "--input-border-radius",
+              "description": "(default: `0.5rem`)",
+              "default": "\"0.5rem\""
+            },
+            {
+              "name": "--input-border-size",
+              "description": "(default: `1px`)",
+              "default": "\"1px\""
+            },
+            {
+              "name": "--input-font-color",
+              "description": "(default: `#111`, dark default: `#efefef`)",
+              "default": "\"#111\""
+            },
+            {
+              "name": "--input-font-size",
+              "description": "(default: `1rem`)",
+              "default": "\"1rem\""
+            },
+            {
+              "name": "--input-line-height",
+              "description": "(default: `1.5`)",
+              "default": "\"1.5\""
+            },
+            {
+              "name": "--input-padding",
+              "description": "(default: `0.25rem`)",
+              "default": "\"0.25rem\""
+            },
+            {
+              "name": "--input-placeholder-color",
+              "description": "(default: `#999`, dark default: `#ccc`)",
+              "default": "\"#999\""
+            },
+            {
+              "name": "--num-columns",
+              "description": "How many columns to display in the emoji grid (default: `8`)",
+              "default": "\"8\""
+            },
+            {
+              "name": "--outline-color",
+              "description": "Focus outline color (default: `#999`, dark default: `#fff`)",
+              "default": "\"#999\""
+            },
+            {
+              "name": "--outline-size",
+              "description": "Focus outline width (default: `2px`)",
+              "default": "\"2px\""
+            },
+            {
+              "name": "--skintone-border-radius",
+              "description": "Border radius of the skintone dropdown (default: `1rem`)",
+              "default": "\"1rem\""
+            }
+          ]
+        }
+      ],
+      "exports": [
+        {
+          "kind": "custom-element-definition",
+          "name": "emoji-picker",
+          "declaration": {
+            "name": "Picker",
+            "module": "picker.js"
+          }
+        },
+        {
+          "kind": "js",
+          "name": "default",
+          "declaration": {
+            "name": "Picker",
+            "module": "picker.js"
+          }
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/package.json b/package.json
index 7e6f05b3..7e0b4584 100644
--- a/package.json
+++ b/package.json
@@ -6,13 +6,15 @@
   "module": "index.js",
   "types": "index.d.ts",
   "type": "module",
+  "customElements": "custom-elements.json",
   "files": [
     "database.js*",
     "index.js*",
     "picker.js*",
     "trimEmojiData.*",
     "svelte.js*",
-    "*.d.ts"
+    "*.d.ts",
+    "custom-elements.json"
   ],
   "scripts": {
     "prepare": "run-s build",