TopCopilot AI Translator

Webpage translation, grammar analysis, and a word dictionary.

Select any English sentence on a web page and instantly break it down with TopCopilot — or translate the whole page into side-by-side bilingual text with one click. [Grammar analysis on selection] • Color-coded sentence components — subject, predicate, object, complement, attributive, adverbial, appositive • Automatic clause classification — attributive, adverbial, object, appositive clauses • Sentence type / tense / voice summary • Three-layer reading — skeleton, inline coloring, detailed blocks • Click any component to see its role in the sentence [Word dictionary card] • Select a single English word to see phonetics, part of speech, definitions, inflections and examples [Full-page bilingual translation] • Translate the main content of a page in place; translations appear right under the original text • Built-in free Bing and Google engines, or switch to an LLM engine for more natural output • Body text only — navigation, ads and code blocks are skipped Two simple steps: click the toolbar icon to open the browser side panel, then select English text on a web page and release the mouse to analyze it automatically. Grammar analysis is powered by a deterministic rule engine (not an LLM) — free, fast and reproducible. Great for GRE/IELTS/TOEFL long-sentence reading and English teaching. Web page translation is free and works without login. Grammar analysis and LLM translation require a one-time login (WeChat QR or SMS) and share the same account and credits as the web and Word plugin versions.