reviewjs

A drop-in visual review & annotation layer for any website. Highlight text, draw rectangles & circles, drop pins, sketch freehand and leave threaded comments — directly on top of your live page.

No backend. No database. No tracking. Comments live in the visitor's own browser (localStorage) and can be downloaded to / imported from a portable JSON file to share with your team.

<script src="https://cdn.jsdelivr.net/npm/@reviewjs/annotate/annotate.js" defer></script>

That single line is the whole installation.

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Why reviewjs?

• One <script> tag. No build step, no framework, no signup.
• Works everywhere. Plain HTML, React, Vue, Svelte, WordPress, Webflow, Shopify, static sites — anything that renders HTML in a browser.
• Local-first & private. Every comment is stored on the reviewer's device. Nothing is sent anywhere.
• Portable. Reviewers export their feedback as JSON and send it to you; you import it with one click and see every note in place.
• Polished UI. A floating toolbar, a Figma-style comments panel, light/dark themes that auto-adapt to your page, and full keyboard shortcuts.
• Tiny & dependency-free. ~40 KB of vanilla JavaScript, zero dependencies.

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Features

Tool	What it does
✏️ Highlight	Select any text to highlight and comment on it
▭ Rectangle	Draw a box around any region
◯ Circle	Circle anything that needs attention
📍 Pin	Drop a point marker anywhere
〰️ Freehand	Sketch directly on the page
➕ Section note	Hover any paragraph/heading for a margin comment button

Plus: threaded replies, resolve/reopen, search & filter, deep-links to a single comment (#an=<id>), an "off" mode that collapses to a small launcher, and a Download / Import round-trip for sharing.

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Quick start

1. The fastest way (CDN)

Add this just before </body>:

<script src="https://cdn.jsdelivr.net/npm/@reviewjs/annotate/annotate.js" defer></script>

That's it — reload the page and the toolbar appears in the bottom-right corner.

Pin a version for production stability: https://cdn.jsdelivr.net/npm/@reviewjs/annotate@1.0.1/annotate.js

unpkg works too: https://unpkg.com/@reviewjs/annotate@1.0.1/annotate.js

2. Self-hosted

Download annotate.js, drop it next to your HTML and:

<script src="/annotate.js" defer></script>

---

Configuration

Configure with data- attributes on the script tag — all optional:

<script
  src="https://cdn.jsdelivr.net/npm/@reviewjs/annotate/annotate.js"
  data-project="marketing-site"
  data-accent="#6d28d9"
  data-theme="auto"
  data-position="bottom-right"
  data-start-open="true"
  data-note="Focus on the hero copy and pricing — flag anything off-brand."
  data-share-email="reviews@example.com"
  defer
></script>

Attribute	Default	Description
data-project	""	Namespace for stored comments. Keep separate sites apart.
data-page	location.pathname	Page key comments are grouped under.
data-accent	—	Brand color for primary buttons & the active tool.
data-theme	auto	light, dark, or auto (sniffs your page background).
data-position	bottom-right	bottom-right or bottom-left.
data-blocks	sensible default	CSS selector for "section note" (+) targets.
data-start-open	false	Set to true to show the review toolbar immediately instead of the collapsed Review pill.
data-note	—	Author's note to reviewers — what should be reviewed. Shown when they start and atop the comments panel.
data-share-email	—	Where reviewers send comments: an email address, or a Slack / Hangout link. Adds a Share button.

Prefer JS config? Set window.AnnotateConfig before the script loads:

<script>
  window.AnnotateConfig = {
    project: "marketing-site",
    accent: "#6d28d9",
    theme: "auto",
    note: "Focus on the hero copy and pricing — flag anything off-brand.",
    shareEmail: "reviews@example.com",
  };
</script>
<script src="https://cdn.jsdelivr.net/npm/@reviewjs/annotate/annotate.js" defer></script>

---

Framework integration

reviewjs is a plain browser script, so the goal everywhere is the same: load annotate.js once, after the page has rendered. Below are copy-paste recipes.

⚛️ React (and Next.js)

Load it once at the app root with a useEffect:

// components/Annotate.jsx
import { useEffect } from "react";

export default function Annotate() {
  useEffect(() => {
    if (document.getElementById("annotate-js")) return;
    window.AnnotateConfig = { project: "my-react-app", accent: "#6d28d9" };
    const s = document.createElement("script");
    s.id = "annotate-js";
    s.src = "https://cdn.jsdelivr.net/npm/@reviewjs/annotate/annotate.js";
    s.defer = true;
    document.body.appendChild(s);
  }, []);
  return null;
}

// App.jsx
import Annotate from "./components/Annotate";

export default function App() {
  return (
    <>
      <Annotate />
      {/* your app */}
    </>
  );
}

Next.js (App Router) — drop the <Script> into app/layout.js:

import Script from "next/script";

export default function RootLayout({ children }) {
  return (
    <html>
      <body>
        {children}
        <Script
          src="https://cdn.jsdelivr.net/npm/@reviewjs/annotate/annotate.js"
          strategy="afterInteractive"
        />
      </body>
    </html>
  );
}

🟩 Vue 3

<!-- App.vue -->
<script setup>
import { onMounted } from "vue";

onMounted(() => {
  if (document.getElementById("annotate-js")) return;
  window.AnnotateConfig = { project: "my-vue-app", accent: "#10b981" };
  const s = document.createElement("script");
  s.id = "annotate-js";
  s.src = "https://cdn.jsdelivr.net/npm/@reviewjs/annotate/annotate.js";
  s.defer = true;
  document.body.appendChild(s);
});
</script>

Or, even simpler, add the <script> tag straight into public/index.html (Vue CLI) / index.html (Vite) before </body>.

🧩 WordPress

Option A — no code. Install a "header/footer scripts" plugin (e.g. WPCode or Insert Headers and Footers) and paste this into the footer box:

<script src="https://cdn.jsdelivr.net/npm/@reviewjs/annotate/annotate.js" data-project="my-wp-site" defer></script>

Option B — theme code. Add to your theme's functions.php:

function reviewjs_enqueue() {
  wp_enqueue_script(
    'reviewjs',
    'https://cdn.jsdelivr.net/npm/@reviewjs/annotate/annotate.js',
    array(),
    '1.0.1',
    true // load in footer
  );
}
add_action( 'wp_enqueue_scripts', 'reviewjs_enqueue' );

Tip: wrap the enqueue in if ( current_user_can('edit_posts') ) to show the review tools only to logged-in editors.

🔷 Svelte / SvelteKit

<!-- src/routes/+layout.svelte -->
<script>
  import { onMount } from "svelte";
  onMount(() => {
    const s = document.createElement("script");
    s.src = "https://cdn.jsdelivr.net/npm/@reviewjs/annotate/annotate.js";
    s.defer = true;
    document.body.appendChild(s);
  });
</script>

<slot />

🅰️ Angular

In angular.json, add to the "scripts" array:

"scripts": [
  "https://cdn.jsdelivr.net/npm/@reviewjs/annotate/annotate.js"
]

🌐 Plain HTML / static sites / Webflow / Shopify / Squarespace

Paste before </body> (or into the platform's "custom code / footer" field):

<script src="https://cdn.jsdelivr.net/npm/@reviewjs/annotate/annotate.js" defer></script>

---

Sharing comments

Because everything is local, sharing is an explicit, privacy-friendly action:

1. A reviewer opens the Comments panel (toolbar list icon or press A).
2. They click Download (⬇) to save a annotate-<page>-<date>.json file.
3. They send you that file.
4. You open the same page, click Import (⬆), pick the file — every comment reappears anchored in place.

You can also drive this from code (see the API below).

---

JavaScript API

A global window.Annotate is available once the script loads:

Annotate.open();              // show the review layer and open the comments panel
Annotate.close();
Annotate.toggle();
Annotate.enable();            // show the review layer
Annotate.disable();           // collapse to the launcher
Annotate.setTool("highlight");// show the layer, then choose cursor | highlight | rect | circle | pen | pin
Annotate.comments();          // → array of comment objects for this page
Annotate.focus(id);           // scroll to & highlight a comment
Annotate.export();            // trigger the JSON download
Annotate.import();            // open the file picker
Annotate.clear();             // delete all comments on this page (local)
Annotate.toast("Saved!");     // show a toast
Annotate.version;             // "1.0.1"

Comment shape

{
  "id": "c…",
  "page": "marketing-site:/pricing",
  "url": "https://example.com/pricing",
  "type": "highlight",
  "author": "Jane Doe",
  "text": "This price looks out of date.",
  "color": "#f59e0b",
  "anchor": { "exact": "…", "prefix": "…", "suffix": "…" },
  "geom": null,
  "resolved": false,
  "replies": [],
  "createdAt": "2026-06-16T10:00:00.000Z",
  "updatedAt": "2026-06-16T10:00:00.000Z"
}

---

Keyboard shortcuts

Key	Action	Key	Action
V	Browse	P	Pin
H	Highlight	A	Comments panel
R	Rectangle	O	Show / hide tools
C	Circle	Esc	Cancel
D	Freehand	?	Shortcuts card

---

Try it locally

git clone git@github.com:reviewjs/annotate.git
cd annotate
npm start          # serves the demo at http://localhost:3000

Open index.html and start annotating. Framework examples live in examples/.

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Browser support

Modern evergreen browsers (Chrome, Edge, Firefox, Safari). Uses standard DOM APIs only — no polyfills required. Gracefully no-ops where localStorage is unavailable (private mode, sandboxed iframes).

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License

MIT — free for personal and commercial use.