WebBoard

About

WebBoard 是一款轻量级 Chrome 浏览器插件，让你在任何网页上直接进行板书涂写和文字标注。

核心功能

画笔工具 — 自由绘制，支持颜色选择（12 色调色板）和粗细调节（1–20px）
文本框工具 — 在任意位置添加文字，支持字体（Sans/Serif/Mono/中文）和字号调节
橡皮擦 — 局部擦除不需要的笔画
普通指针模式 — 穿透画布，正常点击页面元素
工具栏拖拽移动 — 按住工具栏空白处拖拽，位置自动保存
横/纵向切换 — 工具栏可在水平/垂直布局间一键切换
退出板书 — 一键移除所有叠加元素
持久化设置

所有偏好（画笔颜色、粗细、字体、字号、工具栏位置、方向、大小）自动保存到 chrome.storage.sync，关闭页面或重启浏览器也不会丢失。同一个 Chrome 账号下多个设备间自动同步。

使用方式

点击扩展图标开启板书模式（或按快捷键 Cmd+Shift+B / Ctrl+Shift+B）
使用浮动工具栏选择工具开始绘制
再次点击图标或按快捷键关闭
隐私说明

不收集任何用户数据
不需要网络权限
所有设置仅存储在本地 Chrome 存储中

WebBoard is a lightweight Chrome extension that lets you draw and annotate directly on any webpage with an overlay canvas.

Features

Drawing Brush — Freehand drawing with 12-color palette and adjustable thickness (1–20px)
Text Tool — Add text annotations anywhere with customizable font (Sans/Serif/Mono/Chinese) and size
Eraser — Partially erase unwanted strokes
Pointer Mode — Pass through the canvas to interact with page elements normally
Drag-to-Move Toolbar — Drag the toolbar by its empty area to reposition; position saved automatically
Horizontal/Vertical Layout — Toggle the toolbar between horizontal and vertical orientations
Exit Board — Remove all overlay elements with one click
Persistent Settings

All preferences (brush color, thickness, font, text size, toolbar position, orientation, scale) are saved to chrome.storage.sync. They persist across page reloads and browser restarts, and sync automatically across devices signed into the same Chrome account.

How to Use

Click the extension icon to toggle the board (or use Cmd+Shift+B / Ctrl+Shift+B)
Select a tool from the floating toolbar and start drawing
Click the icon again or press the shortcut to exit
Privacy

No user data is collected
No network permissions required
All settings are stored locally in Chrome storage