Passive Voice Detector

Passive voice is a grammatical construction where the subject of the sentence receives the action of the verb rather than performing it. In the sentence "The report was written by the team," the report (subject) receives the action of being written. In the active version — "The team wrote the report" — the team (subject) performs the action. Passive voice is typically formed with a form of the verb "to be" (is, are, was, were, been) followed by a past participle (written, sent, approved). It is grammatically correct but often makes writing longer and less direct.

No. Passive voice is a legitimate grammatical construction and is appropriate in several contexts. Scientific writing often uses passive voice deliberately: "The samples were heated to 100°C" keeps the focus on the experiment rather than the experimenter. When the actor is unknown or unimportant — "The window was broken" — passive voice is perfectly natural. Legal and formal writing also uses it for neutrality and precision. The problem is overuse. When more than 10-20% of your sentences are passive, your writing begins to feel evasive and hard to follow.

The tool uses pattern matching to identify the most common passive constructions: a form of "to be" (is, are, was, were, been, being, has been, had been, will be, would be, etc.) followed by a past participle within the same sentence. It checks against a library of common irregular past participles (written, known, sent, built) and also detects regular past participles ending in -ed (approved, reviewed, completed). This approach catches the large majority of passive sentences. It is a heuristic, not a full grammar parser, so it may occasionally miss unusual constructions or flag borderline cases.

Most writing guides recommend keeping passive voice below 10% of your sentences for general audience content. Hemingway aimed for almost no passive voice in his fiction. The Associated Press Stylebook advises preferring active voice. Google's developer documentation style guide explicitly recommends active voice. Academic writing is more permissive — 20-30% passive is common and accepted in scientific papers. For blog posts, marketing copy, and web content aimed at general audiences, aim for under 10%. This tool flags content above 20% as high and above 40% as excessive.

The key is to identify who or what performs the action and make them the subject of the sentence. Ask: who does the action? In "The proposal was approved by the board," the board performs the action. Rewritten: "The board approved the proposal." When there is no "by" phrase, you need to supply the actor: "Mistakes were made" becomes "We made mistakes" or "The team made mistakes" depending on context. The rewrites panel in this tool attempts to generate a suggested active version for each flagged sentence automatically, though some complex sentences will need manual attention.