Find passive voice constructions (be + past participle) and get the percentage of passive sentences.
未针对 简体中文 设计
该工具针对英语（和一些相近语言）校准。简体中文 的结果可能不准确。
Passive voice combines a form of "to be" (am, is, are, was, were, be, been, being) with a past participle.
This tool scans every sentence for the pattern and highlights matches. Some constructions are ambiguous; treat the results as a guide rather than an absolute count.
A small amount of passive voice is fine — but most engaging writing keeps it under 10%.
We look for "be" forms (am, is, are, was, were, be, been, being) followed within 3 words by a past participle (verbs ending in -ed, -en, plus common irregulars).
Yes. Use passive when the actor is unknown ("The lock was broken") or when you want to emphasise the action over the actor. Aim for under 10% in most writing.
% content words vs. function words.
analysisVocabulary variety — type‑token ratio.
analysisTotal + per‑word syllable counts.
analysisSentence length stats and variety score.