Passive Voice Checker guide
Flag English sentences that contain common auxiliary-verb and participle patterns for careful human review.
What this tool does
The Passive Voice Checker splits English text into sentence-like units and searches each one for a form of be followed by a nearby past-participle pattern. It recognizes common auxiliaries such as is, were, being, and been, participle-like endings such as -ed and -en, and a limited list of irregular forms. Matching phrases are displayed with their source sentences and a candidate rate.
This approach is transparent and fast, but it is not a complete grammar parser. English contains irregular verbs, adjectives that resemble participles, omitted agents, complex clauses, and constructions separated by punctuation. “The door is closed” can describe a state rather than an action, while a genuine passive sentence may use a form the rule list does not recognize. The checker can therefore produce both false positives and false negatives.
Passive voice is not automatically wrong. It can be useful when the actor is unknown, obvious, deliberately de-emphasized, or less important than the action or result. Scientific methods, incident reports, and procedural writing often use it intentionally.
How to use it
- Paste an English passage into the text area.
- Select Check for passive voice.
- Review the sentence count, candidate count, and candidate rate.
- Read every matched phrase in its full sentence.
- Rewrite only when naming the actor would make the sentence clearer or more accountable.
To test a rewrite, identify who performed the action, make that actor the subject, and keep the original meaning. For example, “The report was approved by the editor” can become “The editor approved the report.” Do not invent an actor when the source does not establish one.
Benefits
- Highlights specific phrases instead of returning an unexplained score
- Reports candidates in their sentence context
- Encourages review rather than automatic rewriting
- Explains common limitations and appropriate passive usage
- Processes potentially sensitive drafts locally
Responsible interpretation
A low candidate rate does not prove that writing is clear, accurate, inclusive, or grammatically correct. A high rate does not prove that a passage is poor. Audience, discipline, tone, and purpose matter more than a universal percentage target.
Do not use this result alone to grade students, evaluate employees, determine authorship, or make publishing and compliance decisions. Specialized writing deserves review by a qualified editor familiar with its subject and conventions.
Practical notice: Results are rule-based candidates, not professional editing advice or a definitive grammar judgment.