WordBlock

WordBlock is a Chrome extension for language learners who read real webpages and want fast, in-context lookup without breaking flow. What WordBlock does: Instant on-page lookup card Select or double-click a term to open a compact card directly on the page. Bilingual lookup (English + Chinese) English: definition, pronunciation, etymology, and prefix/root/suffix breakdown. Chinese: pinyin, whole meaning, character map, and usage note. Optional AI explanation Supports OpenAI, Gemini, Claude, DeepSeek, Kimi, and OpenAI-compatible endpoints. Configure endpoint, model, and prompts in Options. AI is optional and can be turned on/off at any time. Learning records and review tools Saves lookup history and favorites. One-click copy for card/list content. Export current list as CSV or JSON. Soft-delete current list (History or Favorites) from the popup toolbar. Popup controls and workflow English-first popup UI with language toggle. Page lookup can be toggled on/off from the popup. Shortcut: Shift + Space to toggle page lookup quickly. How to use: Install the extension. Select an English or Chinese term on any webpage. Use the popup to search manually, review History/Favorites, copy, export, or clean current list. Open Options to configure AI provider/model/prompts and test your AI config. Notes: AI is disabled by default. If AI is enabled, users provide their own API key. WordBlock is a learning aid and not a substitute for professional advice. Permission Justification (for listing/privacy section) Permissions used: storage: stores local cache, lookup history, favorites, soft-delete state, and user AI settings. host_permissions: enables lookup on the current webpage and requests to dictionary/etymology services. Data behavior: Lookup is triggered by explicit user action (selection/manual search), and can be turned off with the page lookup toggle. No ad tracking and no data selling.