Free tool
Passive voice detector.
Detect possible passive-voice sentences so you can make the doer the subject and write more directly.
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How to use the passive voice detector.
What it does. Flags likely passive constructions - forms of to be with a past participle - so you can decide which ones to keep deliberately.
How to use it. Paste the section and review each hit. Keep the passive when the actor is unknown or genuinely unimportant, as in the house was sold; rewrite when it hides who did what - mistakes were made is hiding someone.
Why it matters. Passive voice is not a sin - reflexive passive voice is. Working from a list of candidates turns a style-guide slogan into sentence-level decisions.
Your data. The tool runs entirely in your browser - text you paste never leaves the page, and nothing is uploaded to a server.
Good to know
The detector flags patterns, not crimes - was and a participle sometimes form a perfectly active progressive (was running). Read each hit in its sentence before reaching for a rewrite.
Where this fits
Analysis tools put numbers where a writer's blind spots live: the sentence you always write, the word you lean on, the reading level you drifted into. The number is never the verdict - it is the pointer. Read each flag in its sentence, keep what is deliberate, fix what is not.
Category neighbours: Word density calculator and Readability score
Page reviewed 27 September 2026 · re-checked at every desk sweep