# WuCai - Highlight, Annotation and Note

> WuCai lets you highlight, annotate and take notes on any webpage. Support multi-level tags and web clipping. With our highlight manager, organize notes efficiently, boost learning and work productivity, save time, and stay focused.

Canonical page: [https://chrome-stats.com/d/wucai](https://chrome-stats.com/d/wucai)

## Overview

- **ID:** `wucai`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** wucai
- **Category:** search-tools,bookmarks
- **Daily users:** 442
- **Weekly downloads:** 23
- **Rating:** 4.69 / 5 (13 ratings)
- **Version:** 26.8.152
- **Last updated:** 2026-08-20
- **First published:** 2022-11-24
- **Size:** 735 KB
- **Data as of:** 2026-09-12
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/wucai/)
- **Website:** [https://doc.wucai.site/](https://doc.wucai.site/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/wucai/privacy/](https://addons.mozilla.org/firefox/addon/wucai/privacy/)

## Description

WuCai is a lightweight Chrome extension for highlighting, annotating and taking notes on any webpage. Highlights persist after refresh, support multiple colors, image highlighting, unlimited highlights per page, and a convenient sidebar toolbar with keyboard shortcuts. Use powerful nested tags and an integrated highlight manager to keep your notes organized and easy to find.

Built for knowledge management and productivity, WuCai supports web clipping, export to Text or Markdown, and a “super copy” feature to bypass site copy limits. Multi-device sync and seamless integrations with Obsidian, Logseq, Workflowy and SiYuan make it easy to centralize research and build a personal knowledge system. Learn more in the help guide or contact support for feedback and setup tips.

## Rankings

- #5,451 — Overall
- #185 — Bookmarks
- #31 — take
- #55 — organization
- #105 — note
- #115 — organize

## Permissions and access

### Permissions

- `*://*/*`
- `<all_urls>`
- `tabs`
- `storage`
- `activeTab`
- `scripting`
- `contextMenus`
- `clipboardWrite`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension was recently updated in the past month. New updates may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

### Pros

- Best web highlighter addon on Firefox.
- Continuous updates from the developer.
- Supports highlighting images and exporting to note-taking apps.
- Easy to use and user-friendly.

### Cons

- Does not support highlighting for local .xml and .json files.
- Some users reported it not functioning properly on certain pages or with specific configurations.

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Source: [Chrome-Stats](https://chrome-stats.com/d/wucai)