Highlight, annotate and take notes on the web

This is the WuCai home site: the product homepage and documentation in both Chinese and English live here. Accounts, dashboards and data are still operated per region. 中文版本 →

Choose your service region ​

WuCai runs several independent services worldwide. Accounts and data are isolated per region — you cannot sign in across regions. Pick the one closest to you:

Not sure which one, or signing in to an existing account → Sign in and region selection. Pricing currency, payment methods, app stores and legal terms differ between the three regions; see that page for details.

Download WuCai ​

Edge Extension · Chrome Extension · Firefox Extension · Safari Extension

More ways to install (offline crx, phones and tablets, the WuCai app, PWA dashboard) → Install WuCai.

Here is what it looks like on a real page:

Highlight and annotate right on the page

Clip articles and read them later

Core features ​

• Highlight text anywhere on a page, add annotations and take notes — See how highlighting works
• Save full articles for later reading and capture ideas for easy review — How clipping works
• Chrome, Edge, Safari, Firefox and more, synced across desktop, tablet and mobile — Mobile setup
• Sync notes and articles with Obsidian, flomo, Logseq and SiYuan — Sync options
• Open API with deep integrations for uTools, PopClip, Quicker and other productivity tools — API reference
• Supports OpenClaw, connecting to more external services and workflows
• WuCai CLI lets you batch manage and export your annotations from the terminal

Why WuCai Highlight ​

Years of focus on web annotation, connecting reading, clipping and knowledge management.

• Cross-platform support — a web highlighting and annotation tool that works across Chrome, Edge, Firefox, Safari and tablets.
• Best-in-class highlighting — continuously optimised and adapted for numerous websites.
• Seamless synchronization — keep notes and articles in sync with Obsidian, flomo, Logseq and SiYuan.

What you will use it for ​

Most people start with one specific reading task.

• Mark up a long article, then come back later and find your highlights exactly where you left them
• Collect quotes from different sites into one place, organised with tags and folders
• Save articles to the WuCai dashboard and finish reading them on the commute
• Send everything to Obsidian or SiYuan and let it grow into your own knowledge base

Mentioned by ​

SSPAI · Ruan Yifeng's Weekly · SSPAI browser extensions roundup · Wang Zhiyuan

Frequently asked questions ​

• What is WuCai Highlight, and which browsers does it support? — A browser extension for highlighting, annotating and note-taking. Chrome, Edge, Firefox and Safari, on desktop, phones and tablets. Full feature list
• Is it free? — The free plan covers highlighting, annotation and notes. PRO membership is billed yearly and unlocks the assistant and API. Compare plans
• Where are my highlights stored? — In the cloud, tied to your account. Sign in elsewhere and your whole library is there. Install and sign in
• Can I sync highlights to Obsidian? — Yes, Obsidian, SiYuan, Logseq and flomo are supported, with customisable templates. How sync works
• Does it work with PDF files? — Not yet; WuCai focuses on web pages. What is supported
• Can I use it on a phone? — Yes, install the extension in Edge on Android/iOS, or use the dashboard. Mobile options

More answers in the FAQ; if nothing helps, contact us.

More resources ​

English docs · 中文文档 · Changelog · WuCai Blog · Feedback · Terms of Service · Privacy Policy